95605-37-1Relevant academic research and scientific papers
Nanopore enriched hollow carbon nitride nanospheres with extremely high visible-light photocatalytic activity in the degradation of aqueous contaminants of emerging concern
Yang, Yuxin,Hu, An,Wang, Xinyue,Meng, Jiaqi,Guo, Yihang,Huo, Mingxin,Zhu, Suiyi
, p. 355 - 365 (2019/01/28)
Construction of highly efficient hollow nanosphere photocatalytic systems has been strongly attracting the attention of researchers. In the present work, nanopore enriched hollow carbon nitride nanospheres (HCNNSs) with a smaller particle size (200 nm) and a thinner shell thickness (40 nm) are successfully fabricated by a silica-nanocasting strategy. Such unique structures possess many advantages such as large BET surface area (122 m2 g-1), high light-harvesting ability, fast charge separation and transfer efficiency, plentiful exposed active sites and enhanced oxidation ability of photogenerated holes (h+VB). Therefore, HCNNSs in smaller sizes (HCNNS-200) exhibit extremely excellent visible-light photocatalytic efficiency towards the degradation of contaminants of emerging concern, e.g. levofloxacin (LEVO), in comparison with bulk g-C3N4 and HCNNSs in larger sizes (HCNNS-500). And it takes less than 10 min to finish the degradation of LEVO. The experimental results including those from indirect chemical probing, electron spin resonance, ion chromatography and high performance liquid chromatography-mass spectrometry confirm that h+VB and O2- are the active species that are responsible for the mineralization of LEVO to NO3-, F-, H2O and CO2 under visible-light irradiation. Additionally, the degradation pathway of LEVO in the HCNNS-200 photocatalytic system is also proposed. It is expected that HCNNS-200 can be used as a promising photocatalyst for environmental remediation.
Iron-catalyzed α-methylenation of ketones with N,N-Dimethylacetamide: An approach for α,β-unsaturated carbonyl compounds
Li, Yi-Ming,Lou, Shao-Jie,Zhou, Qin-Hua,Zhu, Lian-Wen,Zhu, Long-Feng,Li, Lei
supporting information, p. 3044 - 3047 (2015/05/13)
In this study, we developed a general iron-catalyzed α-methylenation of ketones by using N,N-dimethylacetamide as the one-carbon source. Various ketones, including aryl and alkyl ketones, enones, and dicarbonyl compounds were well tolerated to yield the corresponding α,β-unsaturated carbonyl compounds in the presence of an iron catalyst, peroxides, and N,N-dimethylacetamide under aerobic conditions. A general and facile iron-catalyzed α-methylenation of carbonyl compounds by using N-methyl amides as the one-carbon source was developed. Various carbonyl compounds (aryl- or alkyl-substituted, enones, 1,3-dicarbonyl compounds) were well tolerated to furnish the corresponding α,β-unsaturated carbonyl compounds in the presence of an iron catalyst, peroxides, and N-methyl amides under aerobic conditions.
