- The influence of different coordination environments on one-dimensional Cu(II) coordination polymers for the photo-degradation of organic dyes
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Three new Cu(ii) coordination polymers, namely, {[Cu3(L1)(NO3)2(DMF)(H2O)]·3(DMF)}n (1), [Cu3(L1)(Cl)2(DMF)2]n (2) and [Cu3(L2)(NO3)4(H2O)4]n (3), were synthesized from pyridine-2,6-dicarbohydrazide based imine linked tritopic ligands. All the complexes were characterized using elemental analysis, IR, UV-vis spectroscopy and ESI-MS. The solid state structures of complexes 1-3 were determined using single crystal X-ray crystallography. The complexes contain trinuclear copper units connected through different anions that lead to the formation of one dimensional (ID) chain structures. Depending upon the anion of the copper salt and donor atoms of the ligands used in complexation, a small variation in the structures was observed. In complex 1, the trinuclear copper units are connected by phenoxo-bridging (μ2-O-) along with one coordinated water molecule, whereas complex 2 is connected through chloride bridging (μ2-Cl) and complex 3 is connected through nitrate ions (μ-[O-N-O]) along with four water molecules. Photo-catalytic activities of the synthesized complexes (1-3) were investigated. All the complexes were found to be photo-catalytically active; however, the distinct coordination environment of the metal ions (i.e. difference in the coordinated water molecules and donor sites of ligands) played a significant role in the catalytic activities. Therefore, this study presents comparative photo-catalytic studies of different coordination environments of metal ions in one-dimensional Cu(ii) coordination polymers. The results provide a potential pathway for the rational design of more efficient photo-catalysts.
- Hussain, Navid,Bhardwaj, Vimal K.
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- A visible-light-driven solid state photo-Fenton reagent based on magnetite/carboxylate-rich carbon spheres
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A visible-light-driven solid state photo-Fenton reagent based on magnetite/carboxylate-rich carbon spheres (MCRCSs) has been one-step fabricated via hydrothermal carbonization (HTC) process. Without using H2O 2, MCRCSs exhibit excell
- Luo, Zhijun,Tang, Hongjun,Qu, Lingling,Han, Tingting,Wu, Xiangyang
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- Carboxyfullerene decorated titanium dioxide nanomaterials for reactive oxygen species scavenging activities
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Titanium dioxide nanomaterials offer superior protection for human skin against ultraviolet light. However, some reports have indicated that they might be associated with adverse effects such as cytotoxicity or reactive oxygen species (ROS) under UV-irrad
- Yang, Kai-Cheng,Zheng, Jia-Huei,Chen, Yen-Ling,Lee, Kuen-Chan,Cho, Er-Chieh
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- Synthesis of ZnO Nanoparticles Assisted by N Sources and their Application in the Photodegradation of Organic Contaminants
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A modified polymeric precursor method assisted by N sources (urea or melamine) was used to obtain anion-doped ZnO nanoparticles. The influence of these molecules on the physical-chemical and photocatalytic properties of the as-synthesized samples was inve
- da Silva, Gelson T. S. T.,Carvalho, Kele T. G.,Lopes, Osmando F.,Gomes, Eliziana S.,Malagutti, Andréa R.,Mastelaro, Valmor R.,Ribeiro, Caue,Mour?o, Henrique A. J. L.
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- Improving photocatalytic reduction of 4-nitrophenol over ZrO2-TiO2 by synergistic interaction between methanol and sulfite ions
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The effect of two sacrificial agents (methanol and sodium sulfite) on the photocatalytic reduction of 4-nitrophenol employing a ZrO2-TiO2 photocatalyst is reported. The experimental results showed a decrease in the generation of OH r
- Guerrero-Araque, Diana,Acevedo-Pe?a, Próspero,Ramírez-Ortega, David,Gómez, Ricardo
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- Microwave-Assisted Synthesis of Perovskite SrSnO3 Nanocrystals in Ionic Liquids for Photocatalytic Applications
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Nanosized SrSnO3 photocatalysts have been successfully synthesized by microwave synthesis in various ionic liquids (ILs) followed by a heat treatment process to optimize the materials' crystallinity. The influence of the ILs with various cation
- Alammar, Tarek,Hamm, Ines,Grasmik, Viktoria,Wark, Michael,Mudring, Anja-Verena
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- New insights into fluorinated TiO2 (brookite, anatase and rutile) nanoparticles as efficient photocatalytic redox catalysts
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The synthesis of anionic-modified nanostructures with specific properties is often hindered by difficulty in tuning the material compositions without sacrificing phase purity and sample uniformity. Here, we present a novel methodology using NH4
- Wang, Yafang,Li, Liping,Huang, Xinsong,Li, Qi,Li, Guangshe
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- Correlations between photocatalytic activity and chemical structure of Cu-modified TiO2–SiO2 nanoparticle composites
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Copper-modified TiO2–SiO2 photocatalysts were prepared by sol–gel method based on organic copper, silicon and titanium precursors. Copper concentration varied from 0.1 to 3.0?mol%. A widely applied model reaction of photocatalytic ox
- ?i?mar,?tangar, U. Lavren?i?,Ar?on
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- Facile Synthesis of Carbon Dots@2D MoS2 Heterostructure with Enhanced Photocatalytic Properties
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To better utilize carbon dots (CDs) as efficient photocatalysts, an excellent strategy of constructing CDs@MoS2 heterostructure is presented. Here a facile sonication-hydrothermal method is utilized to synthesize CDs@MoS2. Such heter
- Li, Ning,Liu, Zhengtang,Liu, Ming,Xue, Chaorui,Chang, Qing,Wang, Huiqi,Li, Ying,Song, Zhenchao,Hu, Shengliang
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- Magnetic nano-sized cadmium ferrite as an efficient catalyst for the degradation of Congo red in the presence of microwave irradiation
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A highly active nano-sized CdFe2O4 catalyst was prepared by a hydrothermal process and characterized by X-ray diffraction (XRD), scanning electronic microscopy (SEM), BET specific surface area method, and vibrating sample magnetometer (VSM) at room temperature. Application of the microwave-induced catalytic degradation method in the abatement of Congo red (CR) using the magnetic catalyst was studied. The degradation ratio of CR with CdFe2O4 reached 94.4% with 10 min microwave irradiation (MW), proving CdFe2O4 to be an excellent microwave catalyst. The intermediate products from CR degradation were investigated by UV-Vis, HPLC and ion chromatography. The reaction kinetics, effects of different ion species (SO42-, NO3-, HCO3-, and CH3COO-), pH of the solution, dye initial concentration, dosage of catalyst, as well as degradation mechanism were comprehensively studied. Radical trapping studies and the fluorescence technique revealed the holes (h+) and hydroxyl radicals (OH) were involved as the main active species in the reaction. The band structure of CdFe2O4 was analyzed by UV-Vis diffuse reflectance spectroscopy and Mott-Schottky measurements. The mechanism of the degradation was discussed in detail. This work can provide an effective technology for dye wastewater treatment.
- Shi, Wen,Liu, Xueyan,Zhang, Tingting,Wang, Qiong,Zhang, Lei
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- DNA Photocleavage by Non-innocent Ligand-Based Ru(II) Complexes
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In this work, we demonstrate for the first time that [Ru(bpy)2(R-OQN)]+ complexes (bpy = 2,2′-bipyridine, R-OQN = 5-chloro-8-oxyquinolate or 5-bromo-8-oxyquinolate) are able to generate hydroxyl radicals and cleave DNA effectively up
- Zhang, Yangyang,Zhou, Qianxiong,Zheng, Yue,Li, Ke,Jiang, Guoyu,Hou, Yuanjun,Zhang, Baowen,Wang, Xuesong
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- Synergetic promotion of the photocatalytic activity of TiO2 by gold deposition under UV-visible light irradiation
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Under UV-visible light irradiation, multiple synergetic promotion effects on the photocatalytic activity of TiO2 by gold deposition can be observed, and plasmonic Au/TiO2 shows great potential for photocatalytic solar conversion.
- Yan, Junqing,Wu, Guangjun,Guan, Naijia,Li, Landong
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- Deciphering a Nanocarbon-Based Artificial Peroxidase: Chemical Identification of the Catalytically Active and Substrate-Binding Sites on Graphene Quantum Dots
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Abstract The design and construction of efficient artificial enzymes is highly desirable. Recent studies have demonstrated that a series of carbon nanomaterials possess intrinsic peroxidase activity. Among them, graphene quantum dots (GQDs) have a high en
- Sun, Hanjun,Zhao, Andong,Gao, Nan,Li, Kai,Ren, Jinsong,Qu, Xiaogang
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- Influence of facets and heterojunctions in photoactive bismuth oxyiodide
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The role of facetted crystalline nanosheets and heterojunctions in bismuth oxyiodide composites for the photodegradation of phenolic compounds is investigated. Single-crystalline nanosheets with either {001} or {110} planes as the dominant facets were for
- Han, Aijuan,Sun, Jiulong,Lin, Xuanhao,Yuan, Cheng-Hui,Chuah, Gaik Khuan,Jaenicke, Stephan
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- Enhanced Photoexcited Carrier Separation in Oxygen-Doped ZnIn2S4Nanosheets for Hydrogen Evolution
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Limited by the relatively sluggish charge-carrier separation in semiconductors, the photocatalytic performance is still far below what is expected. Herein, a model of ZnIn2S4(ZIS) nanosheets with oxygen doping is put forward to obtai
- Yang, Wenlong,Zhang, Lei,Xie, Junfeng,Zhang, Xiaodong,Liu, Qinghua,Yao, Tao,Wei, Shiqiang,Zhang, Qun,Xie, Yi
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- Enhanced photocatalytic activity of nanocrystalline N-doped ZnSb2O6: Role of N doping, cation ordering, particle size and crystallinity
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Trirutile antimonate N-doped nanocrystalline ZnSb2O6 has been synthesised by a facile solution combustion method for the first time. The as synthesized products obtained with different oxidant to fuel ratios (O/F) are crystalline sin
- Arunkumar, Nagarajan,Vijayaraghavan, Rajagopalan
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- Fabrication of ZnO, ZnS, Ag-ZnS, and Au-ZnS microspheres for photocatalytic activities, CO oxidation and 2-hydroxyterephthalic acid synthesis
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This paper reports the synthesis of ZnS microspheres with cubic and hexagonal crystal phases using a solvothermal method. These materials were characterized by a range of techniques. The effects of Au and Ag-doping on ZnS were also examined. Hexagonal phase ZnO microspheres could be obtained by a CO oxidation process over the ZnS microspheres. The onset of CO oxidation occurred above 350 °C, which was increased by Au and Ag doping. The synthesized materials were used for the photocatalytic degradation of mixed dyes {methylene blue (MB) + methyl orange (MO) + rhodamine B (RhB)}. The observed photocatalytic degradation rate over the photocatalysts was in the order, RhB MB 蠐 MO. The photocatalytic degradation activity of the synthesized materials was observed in the order, Au-ZnS ≈ Ag-ZnS 蠐 ZnS ZnO. ZnO was ～6 times more efficient in the photocatalytic synthesis of 2-hydroxyterephthalic acid than the ZnS and metal-doped ZnS. These results further support the importance and wide applications of the synthesized ZnS, Ag-ZnS, Au-ZnS and ZnO microspheres.
- Choi, Young In,Lee, Seungwon,Kim, Seog K.,Kim, Young-Il,Cho, Dae Won,Khan, Mohammad Mansoob,Sohn, Youngku
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- Synthesis of Cr and La-codoped SrTiO3 nanoparticles for enhanced photocatalytic performance under sunlight irradiation
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In this study, we report a facile polymeric citrate strategy for the synthesis of Cr,La-codoped SrTiO3 nanoparticles. The synthesized samples were well characterized by various analytical techniques. The UV-vis DRS studies reveal that the absor
- Tonda, Surendar,Kumar, Santosh,Anjaneyulu, Oruganti,Shanker, Vishnu
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- Graphene nanodots decorated ultrathin P doped ZnO nanosheets as highly efficient photocatalysts
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A novel kind of highly efficient photocatalyst composed of ultrathin P doped ZnO (ZnO:P) nanosheets decorated with graphene nanodots (GNDs) was fabricated. Taking the unique advantages of the ultrathin ZnO nanosheet structure, and the excellent properties
- Zhu, Yuankun,Bu, Xiuming,Wang, Ding,Wang, Ping,Chen, Aiying,Li, Qian,Yang, Junhe,Wang, Xianying
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- Synthesis and Peroxidase-Like Activity of Cobalt@Carbon-Dots Hybrid Material
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A cobalt@carbon-dots (Co@C-dots) hybrid material is successfully prepared and well characterized. The hybrid material exhibits intrinsic peroxidase-like activity and can be utilized for the degradation of methylene blue; it shows enhanced catalytic activi
- Guo, Yali,Liu, Xiaoyu,Yang, Chengduan,Wang, Xudong,Wang, Dan,Iqbal, Anam,Liu, Weisheng,Qin, Wenwu
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- Enhanced oxidase/peroxidase-like activities of aptamer conjugated MoS2/PtCu nanocomposites and their biosensing application
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Hybrid composite materials are particularly useful and offer great opportunities for catalysis due to their multifunctionalities. Taking advantage of the high catalytic properties of bimetallic alloy nanoparticles, the large specific surface area and co-catalytic function of MoS2 nanosheets, we prepare a novel MoS2/PtCu nanocomposite with intrinsic high oxidase- and peroxidase-like activity. The preparation of MoS2/PtCu nanocomposites does not require organic solvents or high temperature. The introduction of single-layer MoS2 nanosheets not only improves porous PtCu nanoparticles with a fine dispersion, but also readily incorporates recognition elements. As a mimic oxidase, the independence of hydrogen peroxide shows the good biocompatibility of MoS2/PtCu for promising bioapplications. On the basis of oxidase-like activity, a novel colorimetric aptasensor (apt-MoS2/PtCu) was developed and its application in the colorimetric detection of cancer cells with different MUC1-protein densities was demonstrated. The as-prepared apt-MoS2/PtCu shows good sensitivity and selectivity to targeting cells. The proposed strategy will facilitate the utilization of MoS2-based nanocomposites with high oxidase/peroxidase activities in biotechnology, biocatalysis etc.
- Qi, Cui,Cai, Shuangfei,Wang, Xinhuan,Li, Jingying,Lian, Zheng,Sun, Shanshan,Yang, Rong,Wang, Chen
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- Preparation of PbYO composite photocatalysts for degradation of methyl orange under visible-light irradiation
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The PbYO composites were prepared through a precipitation method and used for the degradation of methyl orange under visible-light irradiation. The PbYO complex photocatalysts were characterized by X-ray diffraction (XRD), UV-vis diffuse reflectance spect
- Su, Tong-Ming,Liu, Zi-Li,Liang, Yi,Qin, Zu-Zeng,Liu, Jie,Huang, Yan-Qiu
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- Ionic-Liquid-Assisted Microwave Synthesis of Solid Solutions of Sr1?xBaxSnO3 Perovskite for Photocatalytic Applications
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Nanocrystalline Sr1?xBaxSnO3 (x=0, 0.2, 0.4, 0.8, 1) perovskite photocatalysts were prepared by microwave synthesis in an ionic liquid (IL) and subsequent heat-treatment. The influence of the Sr/Ba substitution on the stru
- Alammar, Tarek,Slowing, Igor I.,Anderegg, Jim,Mudring, Anja-Verena
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- Double-Walled ZrO2 Nanotube Array: Preparation and Enhanced Photocatalytic Activity
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This work demonstrates the formation of self-ordered double-walled ZrO2 nanotube array via electrochemical anodization in glycerol-based electrolyte. Compared with its counterpart of single-walled ZrO2 nanotube array, the tube wall o
- Xue, Chaorui,Hu, Shengliang,Chang, Qing,Wang, Yanzhong,Yang, Jinlong
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- Enhancing gas adsorption and separation capacity through ligand functionalization of microporous metal-organic framework structures
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Hydroxyl- and amino- functionalized [Zn(BDC)(TED)0.5] ·2DMF·0.2H2O leads to two new structures, [Zn(BDC-OH)(TED)0.5]·1.5DMF·0.3H2O and [Zn(BDC-NH2)(TED)0.5]·xDMF·yH2O (BDC=terephthalic acid, TED=triethylenediamine, BDC-OH=2-hydroxylterephthalic acid, BDC-NH2=2-aminoterephthalic acid). Single-crystal X-ray diffraction and powder X-ray diffraction studies confirmed that the structures of both functionalized compounds are very similar to that of their parent structure. Compound [Zn(BDC)(TED)0.5]·2DMF·0.2H 2O can be considered a 3D porous structure with three interlacing 1D channels, whereas both [Zn(BDC-OH)(TED)0.5]·1.5DMF·0. 3H2O and [Zn(BDC-NH2)(TED)0.5] ·xDMF·yH2O contain only 1D open channels as a result of functionalization of the BDC ligand by the OH and NH2 groups. A notable decrease in surface area and pore size is thus observed in both compounds. Consequently, [Zn(BDC)(TED)0.5]·2DMF·0. 2H2O takes up the highest amount of H2 at low temperatures. Interestingly, however, both [Zn (BDC-OH)(TED)0.5] ·1.5DMF·0.3H2O and [Zn(BDC-NH2)(TED) 0.5] ·xDMF·yH2O show significant enhancement in CO2 uptake at room temperature, suggesting that the strong interactions between CO2 and the functionalized ligands, indicating that surface chemistry, rather than porosity, plays a more important role in CO2 adsorption. A comparison of single-component CO2, CH4, CO, N2, and O2 adsorption isotherms demonstrates that the adsorption selectivity of CO2 over other small gases is considerably enhanced through functionalization of the frameworks. Infrared absorption spectroscopic measurements and theoretical calculations are also carried out to assess the effect of functional groups on CO2 and H2 adsorption potentials.
- Zhao, Yonggang,Wu, Haohan,Emge, Thomas J.,Gong, Qihan,Nijem, Nour,Chabal, Yves J.,Kong, Lingzhu,Langreth, David C.,Liu, Hui,Zeng, Heping,Li, Jing
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- Enhanced visible-light-induced photocatalytic performance of a novel ternary semiconductor coupling system based on hybrid Zn-In mixed metal oxide/g-C3N4 composites
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Hybrid composites of Zn-In mixed metal oxides (ZnIn-MMO) and g-C3N4 were synthesized by a facile thermal decomposition of Zn-In layered double hydroxide (ZnIn-LDH) and melamine mixture precursors. The structural and optical propertie
- Lan, Meng,Fan, Guoli,Yang, Lan,Li, Feng
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- Preparation of a ZnO/TiO2 vertical-nanoneedle-on-film heterojunction and its photocatalytic properties
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This paper introduces a process to prepare a novel ZnO/TiO2 heterojunction composite with ZnO nanoneedles vertically grown on a TiO 2 film via micro-arc oxidation (MAO), pulse plating and thermal oxidation. Firstly a TiO2
- Li, Delong,Zhang, Yupeng,Wu, Wenhui,Pan, Chunxu
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- Direct coating ZnO nanocrystals onto 1D Fe3O4/C composite microrods as highly efficient and reusable photocatalysts for water treatment
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In this wok, we demonstrated a facile two-step method to directly coat a ZnO nanocrystal layer on the surface of one-dimensional (1D) Fe3O4/C composite microrods to form Fe3O4/C@ZnO core-shell microrods. Firstly, 1D Fe3O4/C composite microrods were successfully synthesized by one-pot magnetic field-induced solvothermal reaction according to our previous work. Sencondly, a uniform ZnO nanocrystal layer was facilely coated onto the 1D Fe3O4/C composite microrods via a modified hydrothermal process at a low temperature (60 °C). Importantly, the size of ZnO nanocrystals and the thickness of coating layer can be easily tuned by varying the concentration of Zn(Ac)2·2H2O in the solution. Further investigation has revealed that the as-prepared core-shell microrods exhibited enhanced photocatalytic activity for the decolorization of photosensitized dyes (Congo red) under visible-light illumination. Moreover, these magnetically separable photocatalysts can be readily recycled by a magnet with virtually no loss in catalytic efficiency. We believe this facile synthesis strategy provides a general and efficient way to synthesize other 1D magnetic nanocomposites for different functional applications.
- Wang, Yanrong,Ning, Jiqiang,Hu, Enlai,Zheng, Changcheng,Zhong, Yijun,Hu, Yong
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- Magnetite/bi-doped carboxylate-rich carbon spheres-a highly efficient magnetic photocatalyst based on dimetallic FeII/FeIII and BiIII/BiIV photoredox cycles
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A new magnetically separable visible-light photocatalyst, magnetite/Bi-doped carboxylate-rich carbon spheres (Bi-MCRCSs), was synthesized under ultrasonic irradiation by using magnetite/carboxylate-rich carbon spheres (MCRCSs) as a precursor. The Bi-MCRCS
- Luo, Zhijun,Qu, Lingling,Han, Tingting,Zhang, Zhen,Shao, Xiaoling,Wu, Xiangyang,Chen, Zhong-Lin
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- Targeted deposition of ZnO2 on brookite TiO2 nanorods towards high photocatalytic activity
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A novel heterostructure was first synthesized by directly depositing photocatalytic inert ZnO2 onto facet {201} of brookite nanorods. The heterostructure thus obtained was found to show a superior photocatalytic activity under UV-light irradiat
- Guo, Meichen,Li, Liping,Lin, Haifeng,Zuo, Ying,Huang, Xinsong,Li, Guangshe
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- Ti0.89Si0.11O2 single crystals bound by high-index {201} facets showing enhanced visible-light photocatalytic hydrogen evolution
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Silicon (Si) doped anatase titanium dioxide (Ti0.89Si 0.11O2) single crystals bound by high-index {201} facets and high-energy {001} facets were synthesized by a facile method. It was found that the Si-doping can widely ex
- Wu, Long,Jiang, Hai Bo,Tian, Feng,Chen, Zhigang,Sun, Chenghua,Yang, Hua Gui
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- A new 2D cadmium coordination polymer based on hydroxyl-substituted benzenedicarboxylic acid as an effective heterogeneous catalyst for Knoevenagel condensation
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A self-assembled new 2D cadmium network, [Cd (BDC-OH)(DMF)2·DMF]n (Cd-BDC-OH), was synthesized based on 2-hydroxyterephthalic acid (BDC-OH) ligand and utilized as a heterogeneous catalyst for Knoevenagel condensation. The structure was fully elucidated by single-crystal X-ray diffraction, Hirshfeld surface analysis, powder X-ray diffraction, field emission-scanning electron microscopy, Fourier transform-infrared spectroscopy and thermogravimetric analysis. The fabricated coordination polymer exhibited high catalytic activity under ambient conditions, and was used without significant drop in product yield in further cycles.
- Sefidabi, Farzaneh,Abbasi, Alireza,Mortazavi, Saeideh-Sadat,Masteri-Farahani, Majid
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- Cu(0) nanoparticle-decorated functionalized reduced graphene oxide sheets as artificial peroxidase enzymes: Application for colorimetric detection of Cr(vi) ions
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Graphene oxide (GO) sheets were functionalized by a "click" chemistry approach using azide modified GO and alkynyl-terminated d(+)-glucose precursors to produce glucose terminated hydrophilic GO surfaces. This hydrophilic functionalized GO surface was uti
- Borthakur, Priyakshree,Boruah, Purna K.,Das, Manash R.,Szunerits, Sabine,Boukherroub, Rabah
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- Sonocatalytic degradation of Rhodamine B catalyzed by β-Bi2O3 particles under ultrasonic irradiation
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β-Bi2O3 particles were synthesized by a polyacrylamide sol-gel method. The sonocatalytic activity of β-Bi2O3 particles was evaluated by degrading Rhodamine B (RhB) under the ultrasonic irradiation, revealing tha
- Chen, Xuefu,Dai, Jianfeng,Shi, Gaofeng,Li, Lan,Wang, Guoying,Yang, Hua
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- Mechanistic study of visible light driven photocatalytic degradation of EDC 17α-ethinyl estradiol and azo dye Acid Black-52: Phytotoxicity assessment of intermediates
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The present study evaluated the phytotoxicity of degraded intermediates of an endocrine-disrupting compound (EDC) 17α-ethinyl estradiol (EE2) and toxic azo dye Acid Black-52 (AB-52) in photocatalytic degradation. A novel bimetallic (silver and zirconium)
- Naraginti, Saraschandra,Li, Yi,Wu, Yunbo,Zhang, Chi,Upreti, Akhanda Raj
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- Magnetoelectrically Driven Catalytic Degradation of Organics
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Here, the catalytic degradation of organic compounds is reported by exploiting the magnetoelectric nature of cobalt ferrite–bismuth ferrite (CFO–BFO) core–shell nanoparticles. The combination of magnetostrictive CFO with multiferroic BFO gives rise to a m
- Mushtaq, Fajer,Chen, Xiangzhong,Torlakcik, Harun,Steuer, Christian,Hoop, Marcus,Siringil, Erdem Can,Marti, Xavi,Limburg, Gregory,Stipp, Patrick,Nelson, Bradley J.,Pané, Salvador
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- Terephthalic acid: A dosimeter for the detection of hydroxyl radicals in vitro
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Hydroxylation reactions of aromatic compounds have been used to detect hydroxyl radicals produced by gamma irradiation and ultrasound. The present study investigated the suitability of terephthalic acid (THA) as a hydroxyl radical dosimeter for general us
- Barreto, Jose C.,Smith, Gregory S.,Strobel, Nathaniel H. P.,McQuillin, Pamela A.,Miller, Thomas A.
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- Enhanced Catalytic Activity in Liquid-Exfoliated FeOCl Nanosheets as a Fenton-Like Catalyst
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A facile liquid-phase exfoliation method to prepare few-layer FeOCl nanosheets in acetonitrile by ultrasonication is reported. The detailed exfoliation mechanism and generated products were investigated by combining first-principle calculations and experi
- Zhang, Jian,Jiao, Xiu-Ling,Xia, Yu-Guo,Liu, Fang-Fang,Pang, Ying-Ping,Zhao, Xin-Fu,Chen, Dai-Rong
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- Sonocatalytic performance of AgBr in the degradation of organic dyes in aqueous solution
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AgBr sonocatalysts were prepared by a simple method. The AgBr sonocatalysts exhibited excellent sonocatalytic activities against the decolorization of methylene blue, rhodamine B, and methyl orange. By determining the content of ·OH radicals in the ultras
- Wu, Yun,Song, Limin,Zhang, Shujuan,Wu, Xiaoqing,Zhang, Shuna,Tian, Haifeng,Ye, Jiayi
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- Studies on structural defects in bare, PVP capped and TPPO capped copper oxide nanoparticles by positron annihilation lifetime spectroscopy and their impact on photocatalytic degradation of rhodamine B
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Surface defects are potential sites for modifying the activities of photoexcited electrons and holes, and may consequently affect photocatalytic activity. Here we have demonstrated how surface defects in copper oxide nanoparticles can be engineered by ele
- Sharma, Aarti,Dutta, Raj Kumar,Roychowdhury, Anirban,Das, Dipankar
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- One-step hydrothermal synthesis of C, W-codoped mesoporous TiO2 with enhanced visible light photocatalytic activity
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C, W-codoped mesoporous TiO2 is prepared by one-step hydrothermal method and characterized by X-ray diffraction (XRD), Raman spectra, transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoe
- Xiao, Qi,Gao, Lan
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- Fabrication and characterization of a novel PbO2 electrode with a CNT interlayer
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A novel PbO2 electrode (marked as CNT-PbO2) with a carbon nanotube (CNT) interlayer was prepared by electrophoretic deposition and electro-deposition. The surface morphology, structure, electrochemical activity and stability of the C
- Duan, Xiaoyue,Li, Jiarun,Liu, Wei,Chang, Limin,Yang, Chunwei
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- Visible-light-responsive β-Rhombohedral boron photocatalysts
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It's elemental! β-Rhombohedral boron was investigated as an elemental photocatalyst. Boron crystals were found to be photocatalytically active in the generation of .OH radicals under irradiation with visible light (see picture); however, the pr
- Liu, Gang,Yin, Li-Chang,Niu, Ping,Jiao, Wei,Cheng, Hui-Ming
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- Improved photocatalytic performance of the ultra-small Ag nanocrystallite-decorated TiO2 hollow sphere heterostructures
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The ultra-small Ag nanocrystallite-decorated TiO2 hollow sphere heterostructures were fabricated by using a two-step hydrothermal method. These heterostructures demonstrated an excellent photodegradation performance of rhodamine B. The photodeg
- Li, Qian,Zhang, Caihong,Ma, Jianmin,Wang, Guozhong,Ng, Dickon H. L.
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- Microwave-induced catalytic oxidation of malachite green under magnetic Cu-ferrites: New insight into the degradation mechanism and pathway
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Increasing attention has been paid to magnetic ferrites due to their high catalytic activity toward environmental contaminants. However, there is little information related to the generation of active species by magnetic ferrites under microwave (MW) irra
- Liu, Xueyan,An, Shuai,Shi, Wen,Yang, Qi,Zhang, Lei
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- Novel synthesis of magnetic, porous C/ZnFe2O4 photocatalyst with enhanced activity under visible light based on the Fenton-like reaction
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Magnetic visible-light-driven photocatalyst, porous C/ZnFe2O4 (denoted as C/ZFO-CE) was fabricated via a CO2-mediated ethanol route. CO2-mediated ethanol route largely mitigated the solvent strength and facilita
- Wang, Fangxiao,Chen, Yanglin,Zhu, Rongshu,Sun, Jianmin
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- The influence of the morphology of 1D TiO2 nanostructures on photogeneration of reactive oxygen species and enhanced photocatalytic activity
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The influence of morphology in one-dimensional (1D) TiO2 nanostructures—specifically nanotubes (TNT), nanofibers (TNF), nanorods (TNR), and nanowires (TNW)—on the photogeneration of reactive oxygen species (ROS) and the resulting effect on phot
- Rosales, Maibelin,Zoltan, Tamara,Yadarola, Ciro,Mosquera, Edgar,Gracia, Francisco,García, Andreina
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- Preparation of CdS NCs decorated TiO2 nano-tubes arrays photoelectrode and its enhanced photoelectrocatalytic performance and mechanism
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CdS nano-crystallites decorated TiO2 nano-tubes arrays (CdS NCs/TiO2 NTAs) photoelectrodes were prepared through anodization, followed by electrodeposition strategy. Subsequently, structures of the resulting CdS NCs/TiO2 N
- Cheng, Xiuwen,Pan, Guoping,Yu, Xiujuan,Zheng, Tong
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Read Online
- Modification of tungsten trioxide with ionic liquid for enhanced photocatalytic performance
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To develop WO3, a narrow band gap semiconductor with a deep valence band, into an efficient visible light photocatalyst, we modified WO 3 with an ionic liquid [Bmim]I through a facile impregnation method in this study. Upon visible l
- Liu, Jingjing,Han, Suiqi,Li, Jia,Lin, Jun
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Read Online
- One-step vulcanization of Cd(OH)Cl nanorods to synthesize CdS/ZnS/PdS nanotubes for highly efficient photocatalytic hydrogen evolution
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In this work, a novel strategy, one-step vulcanization of Cd(OH)Cl nanorods in the presence of ZnCl2 and Na2PdCl4, is successfully developed to synthesize CdS/ZnS/PdS nanotubes (NTs) for the first time. In this method, the
- Sun, Guotai,Mao, Siman,Ma, Dandan,Zou, Yajun,Lv, Yixuan,Li, Zhihui,He, Chi,Cheng, Yonghong,Shi, Jian-Wen
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Read Online
- Fluorogenic naked eye “turn-on” sensing of hypochlorous acid by a Zr-based metal organic framework
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Hypochlorous acid (HOCl) is involved in several physiological and pathological functions. Hence, sensitive and accurate detection of HOCl is much needed. We report herein a new (dimethylthiocarbamoyl)oxy functionalized aqua stable Zr-UiO-66 MOF for the specific fluorogenic recognition of HOCl in a pure aqueous medium. The activated material (1′) exhibited a dramatic increase in emission intensity (～46-fold) in the presence of HOCl. More importantly, the material has remarkable selectivity towards HOCl over other reactive oxygen species (ROS) and reactive nitrogen species (RNS). The “turn-on” nature of the material after the inclusion of HOCl could be detected by the naked eye under a UV lamp. Furthermore, a linear steady increase was observed with the gradual addition of HOCl solution over a wide linear range of 0-28 μM and the estimated LOD value was found to be 1.22 μM. HOCl-mediated oxidative cleavage of the pendant from the (dimethylthiocarbamoyl)oxy functionality to the hydroxyl functionality is the main reason behind the dramatic fluorescence enhancement of the present compound. The present compound is the first ever MOF based detector for the “turn-on” sensing of HOCl.
- Biswas, Shyam,Ghosh, Subhrajyoti,Nandi, Soutick,S. K., Mostakim
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supporting information
p. 14211 - 14217
(2021/08/16)
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- Revisiting terephthalic acid and coumarin as probes for photoluminescent determination of hydroxyl radical formation rate in heterogeneous photocatalysis
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We investigated in detail the applicability of two radical scavengers – coumarin (COUM) and terephthalic acid (TA) – as probe compounds in a widely used photoluminescent (PL) determination of OH? radical rate formation of photocatalysts. The study reveals that precautions must be taken when using either of the two compounds as neither allows a direct determination of the absolute OH? radical formation rate. Chromatographic analyses of irradiated COUM and TA solutions revealed that both probe compounds reacted via more than one pathway, out of which, only one pathway in each case yielded the measured photoluminescent 7-hydroxycoumarin (7-OHC) and 2-hydroxyterephthalic acid (TAOH), respectively. Applicability of both probes was also tested on three model TiO2-based catalysts (anatase TiO2 nanorods (TNR), anatase TiO2 nanoparticles (TNP), amorphous TiO2 nanorods (a-TNR)). Regardless of the probe compound used, the order of relative OH? radical formation rates determined for these catalysts was the same (TNR a-TNR) and in good correlation with the order of bisphenol A (BPA) degradation rates. This demonstrates that (i) formation of OH? radicals is the predominating criterion when probing a photocatalyst's activity (but not the only one) and that (ii) TA and COUM potentially enable a relative evaluation of photocatalytic materials, despite the numerous shortcomings of these probes. However, in order to allow for general inter-laboratory comparisons the photoluminescence method should clearly be standardized with precisely defined experimental parameters.
- ?erjav, Gregor,Albreht, Alen,Pintar, Albin,Vovk, Irena
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- DIMER COMPOUNDS, AND USE IN BINDING TOXIC REPEATS OF RNA
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Provided herein are compounds and methods for modulating abnormal repeat expansions of gene sequences. More particularly, provided are dimeric inhibitors of RNA and the uses of such inhibitors in regulating nucleotide repeat expansions, e.g., to treat Myotonic Dystrophy Type 1 (DM1), Myotonic Dystrophy Type 2 (DM2), Fuchs dystrophy, Huntington Disease, Amyotrophic Lateral Sclerosis, or Frontotemporal Dementia.
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Paragraph 0131; 0132
(2020/07/16)
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- Syntheses, structures and catalytic mechanisms of three new MOFs for aqueous Cr(VI) reduction and dye degradation under UV light
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Three novel metal–organic frameworks (MOFs) photocatalysts with different structures [Cd(4-Hptz)2(H2O)2Cl2](4-Hptz = 4-(1H-tetrazol-5-yl)-pyridine) (1), [Cu(btx)2(ClO4)2]n/
- Wang, Liwen,Zeng, Tianyu,Liao, Guiying,Cheng, Qingrong,Pan, Zhiquan
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p. 152 - 162
(2018/10/24)
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- Bi2WO6/Ag3PO4-Ag Z-scheme heterojunction as a new plasmonic visible-light-driven photocatalyst: Performance evaluation and mechanism study
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The Bi2WO6/Ag3PO4-Ag Z-scheme heterojunction, as a novel plasmonic visible-light-driven photocatalyst, was prepared by ultrasound assisted in situ precipitation and the hydrothermal method and was further charac
- Amiri, Maryam,Dashtian, Kheibar,Ghaedi, Mehrorang,Mosleh, Soleiman,Jannesar, Ramin
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p. 1275 - 1284
(2019/01/21)
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- Fabrication of a self-doped TiO2 nanotube array electrode for electrochemical degradation of methyl orange
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Self-doped TiO2 nanotube array (DTNA) electrodes were fabricated through anodic oxidation combined with cathodic reduction. The morphology and structural features of pristine TiO2 nanotube arrays and DTNA electrodes were studied thro
- Mo, Chenghao,Wei, Huixian,Wang, Tongjun
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p. 740 - 747
(2019/02/19)
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- Synthesis and characterization of novel Ag/ZnO nanoparticles for photocatalytic degradation of methylene blue under UV and solar irradiation
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ZnO containing various proportions of metallic silver nanoparticles (0–5 wt% Ag) were synthesized by a combined sol-gel and chemical reduction method in which chitosan acts as a steric stabilizer and environmentally benign reducing agent for silver ions.
- Abdel Messih,Ahmed,Soltan,Anis, Samy Sobhy
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- Mixed-Valence Ce-BPyDC Metal-Organic Framework with Dual Enzyme-like Activities for Colorimetric Biosensing
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Enzyme-like metal-organic frameworks (MOFs) are currently one type of starring material in the fields of artificial enzymes and analytical sensing. However, there has been little progress in making use of the MOF structures based on the catalytically acti
- Luo, Linpin,Huang, Lunjie,Liu, Xinnan,Zhang, Wentao,Yao, Xiaolin,Dou, Leina,Zhang, Xu,Nian, Ying,Sun, Jing,Wang, Jianlong
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supporting information
(2019/09/03)
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- Multifunctional iron-based Metal?Organic framework as biodegradable nanozyme for microwave enhancing dynamic therapy
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Nanozymes with excellent enzyme-mimicking catalytic property are playing an increasingly significant role in tumor diagnosis and therapy. Fe-metal organic framework nanoparticles (MIL-101(Fe) NPs) are prepared as nanozymes to generate reactive oxygen spec
- Ma, Xiaoyan,Ren, Xiangling,Guo, Xudong,Fu, Changhui,Wu, Qiong,Tan, Longfei,Li, Hongbo,Zhang, Wei,Chen, Xudong,Zhong, Hongshan,Meng, Xianwei
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- Co2+ substituted for Bi3+ in BiVO4 and its enhanced photocatalytic activity under visible LED light irradiation
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We investigated the fabrication of Co-doped BiVO4 (Bi1-xCoxVO4+δ, 0.05 4. The X-ray diffraction (XRD), Raman, and X-ray photoelectron spectroscopy (XPS) results indicated that the substitution of Co2+ ions for Bi3+ sites in BiVO4 was successful, although a change in the crystal phase of BiVO4 did not occur. UV-vis DRS and PL results suggested that the Co-incorporation could slightly improve the visible light absorption of BiVO4 and induce the separation of photoinduced electron-hole pairs; therefore, a significant enhancement of photocatalytic performance was achieved. The Bi0.8Co0.2VO4+δ sample showed superior photocatalytic activity in comparison with other samples, achieving 96.78% methylene blue (MB) removal within 180 min. In addition, the proposed mechanism of improved photocatalytic activities and the stability of the catalyst were also investigated.
- Nguyen, Trinh Duy,Bui, Quynh Thi Phuong,Le, Tien Bao,Altahtamouni,Vu, Khanh Bao,Vo, Dai-Viet N.,Le, Nhan Thi Hong,Luu, Tuan Duy,Hong, Seong Soo,Lim, Kwon Taek
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p. 23526 - 23534
(2019/08/12)
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- Fabrication of nanostructured NiO/WO3 with graphitic carbon nitride for visible light driven photocatalytic hydroxylation of benzene and metronidazole degradation
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In the present study, we report a novel nanocatalyst prepared by the modification of g-C3N4 nanosheets with a NiO/WO3 nanohybrid via a simple ultra-sonication method. A novel method was employed for the synthesis of the Ni
- Devi, Meghali,Das, Bishal,Barbhuiya, Monjur Hassan,Bhuyan, Bishal,Dhar, Siddhartha Sankar,Vadivel, Sethumathavan
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p. 14616 - 14624
(2019/09/30)
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- Fullerene-Filled Liquid-Crystal Stars: A Supramolecular Click Mechanism for the Generation of Tailored Donor–Acceptor Assemblies
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Two shape-persistent star mesogens with oligo(phenylene ethenylene) arms and a phthalocyanine core—one providing free space (2) and one sterically encumbered by four fullerenes attached through spacers (3)—have been successfully synthesized. In contrast to the smaller discotic derivative 1, mesogen 2 forms a columnar liquid crystal (LC), which can only be partially aligned without π-stacking, while 3 is not an LC. Exceptionally, the 1:1 mixture of 2 and 3 forms an alignable columnar LC with strong π-stacking and quadruply helically organized fullerenes by an unprecedented click process that is similar to a ball detent mechanism. The C60 units also interconnect different columns. This is driven by nanosegregation and space-filling of the voids with fullerenes. Photophysical studies confirm the presence of a light-collecting system that generates charge-separated states in solution and in the solid state, which makes such highly organized materials attractive for the study of future photovoltaic devices.
- Lehmann, Matthias,Dechant, Moritz,Holzapfel, Marco,Schmiedel, Alexander,Lambert, Christoph
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supporting information
p. 3610 - 3615
(2019/02/09)
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- BIS-BENZIMIDAZOLE COMPOUNDS AND METHODS OF USING SAME
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Provided herein are compounds and methods for modulating abnormal repeat expansions of gene sequences. More particularly, provided are inhibitors of RNA and the uses of such inhibitors in regulating nucleotide repeat expansions, e.g., to treat Myotonic Dystrophy Type 1 (DM1 ), Myotonic Dystrophy Type 2 (DM2), Fuchs dystrophy, Huntington Disease, Amyotrophic Lateral Sclerosis, or Frontotemporal Dementia.
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Paragraph 00927-00929
(2019/06/05)
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- Loading sulfur and nitrogen co-doped carbon dots onto g-C3N4 nanosheets for an efficient photocatalytic reduction of 4-nitrophenol
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A favorable interface for hybrid photocatalysts makes an important contribution in enhancing photocatalytic reactions. Herein we located sulfur and nitrogen co-doped carbon dots (SN-CDs) onto g-C3N4 nanosheets and achieved a novel SN
- Chang, Qing,Yang, Shanshan,Li, Liuqing,Xue, Chaorui,Li, Ying,Wang, Yanzhong,Hu, Shengliang,Yang, Jinlong,Zhang, Feng
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supporting information
p. 6435 - 6443
(2018/05/23)
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- Effects of Different Copper Loadings on the Photocatalytic Activity of TiO2-SiO2 Prepared at a Low Temperature for the Oxidation of Organic Pollutants in Water
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The objective of this research is to examine how Cu modification can improve the photocatalytic activity of TiO2-SiO2, to explain the correlation between the Cu concentration and the chemical state of Cu cations in the TiO2/sub
- ?i?mar, Tihana,Lavren?i? ?tangar, Ur?ka,Fanetti, Mattia,Ar?on, Iztok
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p. 2982 - 2993
(2018/07/29)
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- A bifunctional cationic metal-organic framework based on unprecedented nonanuclear copper(ii) cluster for high dichromate and chromate trapping and highly efficient photocatalytic degradation of organic dyes under visible light irradiation
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A bifunctional cationic metal-organic framework {[Cu9(OH)6Cl2(itp)6(1,4-bdc)3](NO3)2(OH)2·20H2O}n (1-NO3-OH·20H2O) was synt
- Zheng, Tian-Rui,Qian, Lin-Lu,Li, Min,Wang, Zhi-Xiang,Li, Ke,Zhang, Ya-Qian,Li, Bao-Long,Wu, Bing
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p. 9103 - 9113
(2018/07/25)
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- Rapid visible light induced photocatalytic degradation of orange-II using H2O2 sensitized Cu2O
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Photocatalytic degradation of orange II has been studied using H2O2 sensitized Cu2O and visible light. Complete degradation of orange II is achieved for 90 min of irradiation. Addition of external oxidant H2Osu
- Narasimha Murthy,Umabala,Prasada Rao
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p. 817 - 820
(2017/02/10)
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- Ternary Layered Double Hydroxides (LDHs) Based on Co-, Cu-Substituted ZnAl for the Design of Efficient Photocatalysts
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Co-, Cu-substituted ZnAl ternary layered double hydroxides (LDHs) were synthesized and explored as efficient photocatalysts for dye degradation. LDH materials were fully characterized with various methods including elemental analysis, X-ray diffraction, i
- Kim, Sanghoon,Fahel, Jean,Durand, Pierrick,André, Erwan,Carteret, Cédric
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p. 669 - 678
(2017/02/05)
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- Enhanced Photocatalytic Activity of a Molybdate-Intercalated Iron-Based Layered Double Hydroxide
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Herein, we report the design and successful fabrication of new Mg/Fe layered double hydroxides (LDHs) with different Mg/Fe molar ratios (2:1, 3:1, and 4:1) by a coprecipitation method. The prepared Mg/Fe (4:1) LDH sample with high crystallinity and phase
- Mohapatra, Lagnamayee,Patra, Dhananjaya,Parida, Kulamani,Zaidi, Syed Javaid
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p. 723 - 733
(2017/02/05)
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- Hierarchical BiOI nanostructures supported on a metal organic framework as efficient photocatalysts for degradation of organic pollutants in water
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Semiconductor-based photocatalysis is a green method for the removal of toxic organic pollutants by decomposition into harmless products. However, traditional single-component semiconductors are unable to reach high degradation efficiencies due to excessive photo charge carrier recombination. The use of hybrid nanocomposite photocatalysts is a promising strategy for overcoming this problem by reducing recombination as well as ensuring that large amounts of solar energy are harvested. Herein, a novel visible-light-active hybrid nanocomposite, BiOI/MIL-88B(Fe), was successfully synthesized through a simple precipitation method. In the BiOI/MIL-88B(Fe) composite, both BiOI and MIL-88B(Fe) have improved charge carrier separation and reduced recombination via a simple Z-scheme mechanism. Photocatalytic degradation of the pollutant RhB was carried out during irradiation of the as-synthesized composites with simulated solar light, and the BiOI/MIL-88B(Fe) (2 wt%) composite was found to exhibit the highest photocatalytic activity among the composites. In addition, colorless phenol and ciprofloxacin (CIP) degradation experiments were also performed to confirm the visible light photocatalytic performance of the BiOI/MIL-88B(Fe) hybrid nanocomposite. Scavenger experiments, PL analysis, NBT transformations, and TA-PL experiments all supported the proposed Z-scheme mechanism of the BiOI/MIL-88B(Fe) composite photocatalyst. Moreover, simple separation from solution provides this 3D composite with good reusability and long-term stability.
- Jahurul Islam,Kim, Hyun Kook,Amaranatha Reddy,Kim, Yujin,Ma, Rory,Baek, Heehyun,Kim, Joonghan,Kim, Tae Kyu
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supporting information
p. 6013 - 6023
(2017/07/10)
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- Macroscopic Polarization Enhancement Promoting Photo- and Piezoelectric-Induced Charge Separation and Molecular Oxygen Activation
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Efficient photo- and piezoelectric-induced molecular oxygen activation are both achieved by macroscopic polarization enhancement on a noncentrosymmetric piezoelectric semiconductor BiOIO3. The replacement of V5+ ions for I5+/su
- Huang, Hongwei,Tu, Shuchen,Zeng, Chao,Zhang, Tierui,Reshak, Ali H.,Zhang, Yihe
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supporting information
p. 11860 - 11864
(2017/09/20)
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- N, N ′-di-caboxy methyl perylene diimide (PDI) functionalized CuO nanocomposites with enhanced peroxidase-like activity and their application in visual biosensing of H2O2 and glucose
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Nanomaterial-based enzyme mimics (nanoenzymes) are a new forefront of chemical research at present. N,N′-Di-carboxy methyl perylene diimide (PDI) functionalized CuO nanobelts with pores (PDI-CuO nanobelts), which were prepared via a facile method and char
- Chen, Miaomiao,Ding, Yanan,Gao, Yan,Zhu, Xixi,Wang, Peng,Shi, Zhiqiang,Liu, Qingyun
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p. 25220 - 25228
(2017/07/10)
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- Peroxidase-Like Activity of Ethylene Diamine Tetraacetic Acid and Its Application for Ultrasensitive Detection of Tumor Biomarkers and Circular Tumor Cells
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Ethylene diamine tetraacetic acid (EDTA) is such a powerful chelating agent that it may form stable complexes with most metal ions, which has wide applications in industry, agriculture, environment, and pharmaceutical technology. Recently, EDTA was found
- Huang, Haowen,Liu, Lanfang,Zhang, Lingyang,Zhao, Qian,Zhou, Yuan,Yuan, Shishan,Tang, Zilong,Liu, Xuanyong
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p. 666 - 672
(2017/08/09)
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- Novel visible-light-driven BiFeO3-Bi2WO6 nanocomposites toward degradation of dyes
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The different mole ratios of novel visible-light-driven BiFeO3-Bi2WO6 nanocomposites were synthesized by a two-step method, i.e. precipitation followed with hydrothermal process. Advanced characterization techniques such a
- Chaiwichian, Saranyoo,Wetchakun, Khatcharin,Kangwansupamonkon, Wiyong,Wetchakun, Natda
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p. 183 - 192
(2017/09/25)
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- Octahedral-based redox molecular sieve M-PKU-1: Isomorphous metal-substitution, catalytic oxidation of sec-alcohol and related catalytic mechanism
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Octahedral-based redox molecular sieves M-PKU-1 (M[dbnd]Cr, Fe) were synthesized by isomorphous metal-substitution and used as catalysts for catalytic dehydrogenation of sec-alcohols using H2O2 as oxidant. Various characterizations, such as X-ray diffraction Rietveld refinement and XPS spectrum, confirmed that transition metals were embedded successfully inside the PKU-1 framework with a high level (about ～50 atom %) and presented in the valence state of +3. Molecular probe analyzes suggested that Cr sites catalyzed the quick formation of active OH radicals, however strongly suppressed the generation of superoxide O2- ions. Under the performed reaction conditions, 10%Cr-PKU-1 exhibited excellent catalytic performances (>99?% selectivity) and kept favorable recyclable stability. A hypothetical mechanism was proposed, which involved a Cr3+-Cr2+-Cr3+ circle when the oxidative dehydrogenation reaction happened. Furthermore, qualitative and quantitative analyzes were performed to illustrate the stepwise by-products generated in the probable pathway due to the over-oxidization, but the selectivity to the two proposed pathways seemed to be in equal portions and didn't have any obvious preference. Obviously, our preliminary results still merit further exploration; we believe however, they would provide helpful information to better understand the structure-activity relationship and the key function of Cr-PKU-1 in the catalytic activation of H2O2.
- Wang, Weilu,Hu, Shixiang,Li, Lingjie,Gao, Wenliang,Cong, Rihong,Yang, Tao
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p. 130 - 141
(2017/06/06)
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- Photopatterning of fluorescent host-guest carriers through pore activation of metal-organic framework single crystals
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Encoded fluorescent particles are fabricated through the selective uptake of dyes in photopatterned metal-organic framework single crystals. The concept is based on spatially controlled photochemical cleavage of pore-blocking pendant groups. Because of the crystalline and porous nature of the host, this approach enables guest uptake that is tunable and can be triggered though controlled irradiation.
- Stassen,Boldog,Steuwe,De Vos,Roeffaers,Furukawa,Ameloot
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supporting information
p. 7222 - 7225
(2017/07/11)
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- Fabrication of a novel PbO2 electrode with a graphene nanosheet interlayer for electrochemical oxidation of 2-chlorophenol
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A novel PbO2 electrode with a graphene nanosheet interlayer (marked as GNS-PbO2) was prepared combining electrophoretic deposition and electro-deposition technologies. The micro morphology, crystal structure and surface chemical states of GNS-PbO2 electrodes were characterized using scanning electronic microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Their electrochemical properties and stability were determined using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), ·OH radicals test and accelerated life test, and compared with traditional PbO2 electrodes. Besides, their potential application in the electrochemical degradation of 2-chlorophenol (2-CP) was investigated. The GNS-PbO2 electrode possessed perfect octahedral β-PbO2 microcrystals, and its grain size was much smaller than that of traditional PbO2 electrode. It exhibited higher electrochemical activity than traditional PbO2 electrode due to its larger electrochemical active surface area and stronger ·OH radicals generation ability. The service lifetime of GNS-PbO2 electrode (107.9?h) was 1.93 times longer than that of traditional PbO2 electrode (55.9?h). The electrochemical degradation rate constant of 2-CP on GNS-PbO2 electrode (kapp?=?2.75?×?10?2?min?1) is much higher than for PbO2 electrode (kapp?=?1.76?×?10?2?min?1). 2-CP oxidation yielded intermediates including aromatic compounds (catechol, phenol and ortho-benzoquinone) and organic acids (oxalic acid, maleic acid and glutaconic acid), and a possible degradation pathway for 2-CP was proposed accordingly.
- Duan, Xiaoyue,Zhao, Cuimei,Liu, Wei,Zhao, Xuesong,Chang, Limin
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p. 424 - 436
(2017/04/28)
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- Controlled Synthesis of Recyclable, Porous FMO/C@TiO2 Core-Shell Nanofibers with High Adsorption and Photocatalysis Properties for the Efficient Treatment of Dye Wastewater
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One-dimensional magnetite/manganese iron oxide modified by carbon coating and with TiO2 nanoparticles into core-shell composite nanofibers (FMO/C@TiO2) with porous structure were fabricated using organometallic compounds as templates
- Chen, Dezhi,Liu, Caixia,Chen, Suhua,Shen, Weisong,Luo, Xubiao,Guo, Lin
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p. 282 - 291
(2016/03/15)
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- Soft template induced phase selective synthesis of Fe2O3 nanomagnets: One step towards peroxidase-mimic activity allowing colorimetric sensing of thioglycolic acid
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Different Schiff's base (SB) templates have been obtained to mediate phase selective synthesis of α- or γ-Fe2O3 from the same temperature condition. The inherent phase transformation tendency (γ-Fe2O3 to α-Fe2O3) is found to be inhibited. Again, the phase selective evolution emerges out of the binding modes of SBs which has been illustrated here. The nature of SBs governs the shape and size distribution of Fe2O3 NPs. As both the phases are magenetically active, easy magnetic separation of them widens their applicability in catalysis. Magnetically active both α- and γ-Fe2O3 mimic interesting peroxidase like activity by oxidising colourless 3,3′,5,5′-tetramethylbenzidine (TMB) to blue coloured oxidised product (Ox-TMB) in aqueous H2O2. These results prompted us to improvise further to detect thioglycolic acid (TGA) at a micromolar level which provides commercial applicability.
- Roy, Anindita,Sahoo, Ramkrishna,Ray, Chaiti,Dutta, Soumen,Pal, Tarasankar
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p. 32308 - 32318
(2016/04/26)
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- Photocatalytic activity of one step flame-made fluorine doped TiO2
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The photocatalytic performance of a series of fluorinated TiO2 samples (F for O molar substitution ranging from 0 to 1.5 at.%) synthesized by flame spray pyrolysis (FSP) in single step is examined in relation to the results of several complemen
- Dozzi, Maria Vittoria,Zuliani, Alessio,Grigioni, Ivan,Chiarello, Gian Luca,Meda, Laura,Selli, Elena
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p. 220 - 226
(2016/06/14)
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