814-91-5Relevant articles and documents
Ultrasound assisted quick synthesis of square-brick-like porous CuO and optical properties
Qiu, Mo,Zhu, Lianjie,Zhang, Tongtong,Li, Hongbin,Sun, Youguang,Liu, Kun
, p. 2437 - 2441 (2012)
Square-brick-like CuC2O4 intermediate was synthesized quickly by an ultrasound and microwave assisted solution route in the presence of sodium dodecyl benzene sulfonate (SDBS) surfactant using CuCl2 and K2C2O4 as raw materials. The CuC 2O4 was transformed into CuO with a preserved morphology by heating at 300°C for 2 h. The products were characterized by XRD, TG-DTA, XPS, SEM, TEM, HRTEM and N2 adsorption-desorption measurement. The light harvesting capability, photoluminescence and surface photovoltage properties of the CuO were investigated. The width and thickness of the obtained porous CuO square bricks are ca. 0.5-1 μm and 200 nm, respectively. Its average primary particle size is 12 nm. The formation mechanism of this square-brick-like CuO was investigated on the basis of series of controlling experiments. The results show that SDBS, C2O42- and ultrasonic processing play important roles in the formation of this square-brick-like morphology.
Kinetics of the thermal decomposition of CuC2O4-ZnC2O4 mixture in air
Gabal
, p. 199 - 208 (2003)
The thermal decomposition processes taking place in the solid state oxalate mixture of CuC2O4-ZnC2O4· 2H2O (1:1 mole ratios) have been studied in air using DTA-TG, XRD and SEM techniques. DTA-TG curve
Preparation, characterization, and electrochemical application of mesoporous copper oxide
Cheng, Liang,Shao, Mingwang,Chen, Dayan,Zhang, Yuzhong
, p. 235 - 239 (2010)
Mesoporous CuO was successfully synthesized via thermal decomposition of CuC2O4 precursors. These products had ring-like morphology, which was made up of nanoparticles with the average diameter of 40 nm. The electrochemical experiments showed that the mesoporous CuO decreased the overvoltage of the electrode and increased electron transference in the measurement of dopamine.
A high-performance sodium-ion full cell with a layered oxide cathode and a phosphorous-based composite anode
Oh, Seung-Min,Oh, Pilgun,Kim, Sang-Ok,Manthiram, Arumugam
, p. A321 - A326 (2017)
A low-cost sodium-ion full cell with a O3-type layered Na[Cu0.2(Fe1/3Mn2/3)0.8]O2 cathode and an alloy-type P-TiP2-C anode is presented. The cathode is synthesized by an oxalate coprecipitation method and optimized cathodes shows a high specific capacity of 135 mAh g?1 at 0.1C rate with a high rate capability of 90 mAh g?1 at 1C rate and 70 mAh g?1 at 2C rate with good cyclability. The full cell exhibits better capacity retention than the half cell with the cathode due to the elimination of the degradation caused by sodium-metal anode. The dramatically enhanced electrochemical performance of the Na[Cu0.2(Fe1/3Mn2/3)0.8]O2 / P-TiP2-C full cell compared to that of the sample with no Cu is attributed to the structural stabilization imparted by Cu by suppressing the phase change from the O3 structure to the P3 structure during cycling.
Synthesis, crystal structure and magnetic properties of [Cr 2Cu2(bpy)4(OX)5]·2H 2O. An oxalato-bridged heterometallic tetramer
Coronado, Eugenio,Giménez, Mari Carmen,Gómez-García, Carlos J.,Romero, Francisco M.
, p. 3115 - 3122 (2003)
A new heterometallic tetramer of formula [Cr2Cu 2(bpy)4(ox)5]·2H2O (1) (bpy=2,2′-bipyridine; ox=oxalate dianion) has been prepared and characterised by single-crystal X-ray diffraction, magnetic susceptibility measurements and ESR spectroscopy. The tetranuclear unit in 1 can be viewed as the combination of two terminal [Cr(bpy)2(ox)]- units with a central oxalato-bridged copper(II) dimer. The chromium ions are in a distorted octahedral environment with metal-ligand distances ranging from 1.944(4) to 2.064(5) A?. The copper(II) centres lie in an axially distorted octahedron. The axial positions are occupied by one oxygen atom belonging to the central bridging oxalate anion [O(9)-Cu(1): 2.245(5) A?] and one oxygen atom coming from the [Cr(bpy)2(ox)]- moiety [O(7)-Cu(1): 2.357(5) A?]. The N2O2 equatorial environment is formed by a bpy ligand [Cu-N mean distance: 1.989(6) A?] and the remaining oxygen atoms [Cu-O mean distance: 2.162(5) A?]. The magnetic properties of 1 have been investigated in the 2-300 K temperature range. A ferromagnetic interaction between the copper(II) centres (J 1=+2 cm-1) is observed, whereas the interaction between the adjacent chromium(III) and copper(II) cations is weakly antiferromagnetic (J2=-0.65 cm-1).
Thermal behaviour of the homopolynuclear glyoxylate complex combinations with Cu(II) and Cr(III)
Stefanescu,Sasca,Birzescu
, p. 515 - 524 (2003)
Homopolynuclear complexes of Cu(II) respectively Cr(III) with the glyoxylate dianion, C2H2O42-, have been studied in non-isothermal regime in air and nitrogen. The results of the non-isothermal analysis performe
Preparation, identification and thermal investigation of solid solutions of cobalt-copper oxalates
Donia, Ahmed M.,Dollimore, David
, p. 139 - 147 (1997)
The solid-solution oxalates of the series CoxCu1 -xC2O4.nH2O were prepared by coprecipitation from nitrate solutions. The characterization of the coprecipitates was carried out using X-ray powder diffraction (XRD), scanning electron microscopy and thermal analysis (TG/DTA) experiments in nitrogen. The results reveal the formation of a solid-solution with high cobalt content (x = 0.7) whereas other compositions with x = 0.3 or 0.5 did not form. The final solid products of the thermal treatment of the investigated oxalates are characterized by the formation of oxygen-deficient non-stoichiometric oxides. The thermal decomposition of the solid-solution and its mechanical mixture with the same mole ratio are very different. The first gave mixed lattice oxides in tri-and divalent states, whilst the latter gave separate oxides in the divalent state.
Reactivity of binary mixtures of La(III) oxide and Cu(II) oxalate or nitrate and synthesis of La(III) cuprate
Bapat,Natu,Kher,Bhide
, p. 285 - 294 (2000)
Reactivity of mixtures of La(III) oxide and Cu(II) oxalate/nitrate in hydrated as well as anhydrous state was studied using TG, DTA and XRD. Cu(II) oxide formed in the endothermic decomposition of mixture containing hydrated Cu(II) nitrate and La(III) oxi
Preparation and characterization of CuO nanorods by thermal decomposition of CuC2O4 precursor
Xu, Congkang,Liu, Yingkai,Xu, Guoding,Wang, Guanghou
, p. 2365 - 2372 (2002)
Synthesis of copper oxide (CuO) nanorods was achieved by thermal decomposition of the precursor of CuC2O4 obtained via chemical reaction between Cu(CH3COO)2·H2O and H2C2O4·2H2O in the presence of surfactant nonyl phenyl ether (9)/(5) (NP-9/5) and NaCl flux. Transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), selected-area electron diffraction (SAED) and high-resolution TEM (HRTEM) were used to characterize the structure features and chemical compositions of the as-made nanorods. The results showed that the as-prepared nanorods is composed of CuO with diameter of 30-100 nm, and lengths ranging from 1 to 3 μ m. The mechanism of formation of CuO nanorods was also discussed.
Syntheses of crystal structures and in vitro cytotoxic activities of new copper(II) complexes of pyridine-2,6-dicarboxylate
Orhan, O?uzhan,?olak, Alper Tolga,Emen, Fatih Mehmet,Kismali, Gorkem,Meral, Ogunc,Sel, Tevhide,?ilgi, Gülbanu Koyundereli,Ta?, Murat
, p. 4003 - 4016 (2015)
[Cu(pydc)(im)]n (1), [Cu(pydc)(mim)3]2H2O (2), [Cu(pydc)(ampy)(H2O)]H2O (3), and [Cu(pydc)(phen)][Cu(Hpydc)2] (4) (H2pydc = 2,6-pyridinedicarboxylic acid or dipicolinic acid, im = imidazole, mim = 2-methylimidazole, ampy = 2-amino-4-methylpyridine, and phen = 1,10-phenanthroline) were synthesized and characterized by elemental analysis, spectroscopic measurements (UV-vis and IR spectra) and single crystal X-ray diffraction. Complexes 1, 2 and 3 were studied by thermogravimetric analysis from ambient temperature to 1100 K under nitrogen and thermal stabilities were investigated. The effects of complexes on proliferation of fibrosarcoma cells were investigated using the Quick Cell Proliferation Assay. The cell viability changes depend on the concentrations and type of complexes. According to cell proliferation/viability data, 4 was determined to be the most cytotoxic.
