A series of BUC-21/N-K2Ti4O9 composites(B1NX)were facilely fabricated from BUC-21 and N-K2Ti4O9 via ball-milling,and they were fully characterized using various techniques.The photocatalytic reduction of Cr(Ⅵ)over th...A series of BUC-21/N-K2Ti4O9 composites(B1NX)were facilely fabricated from BUC-21 and N-K2Ti4O9 via ball-milling,and they were fully characterized using various techniques.The photocatalytic reduction of Cr(Ⅵ)over the B1NX composites was investigated systematically under various conditions,including different light sources,pH values,hole scavengers,and inorganic ions,in both real lake water and tap water.The BUC-21/N-K2Ti4O9 composites demonstrated remarkable photocatalytic Cr(Ⅵ)reduction performance,good reusability,and stability under both UV and white light irradiation.The introduction of N-K2Ti4O9 into BUC-21 not only broadened its light absorption region to white light,but also strongly inhibited the recombination of the photo-generated electrons and holes.Mechanisms of photocatalytic Cr(Ⅵ)reduction under both UV light and white light were proposed and verified by electrochemical measurements,active species capture experiments,and ESR measurements.展开更多
The interaction between β-K 4H 3 [SiW 9O 37(CpTi) 3]·11H 2O and DNA was investigated by agarose gel electrophoresis. The results suggest that β-K 4H 3[SiW 9O 37(CpTi) 3]·11H 2O can degrade the genomic DNA....The interaction between β-K 4H 3 [SiW 9O 37(CpTi) 3]·11H 2O and DNA was investigated by agarose gel electrophoresis. The results suggest that β-K 4H 3[SiW 9O 37(CpTi) 3]·11H 2O can degrade the genomic DNA. The treatment of plasmid DNA with β-K 4H 3 [SiW 9O 37(CpTi) 3]·11H 2O resulted in a fast moving band in front of the three normal conformations(super coiled DNA, linear DNA and relaxed circular DNA) in agarose gel electrophoresis . These results indicate that this chemical material may have the ability to specifically cleavage DNA or to alter conformation of DNA molecules.展开更多
Photocatalyst CoPcS/TiO2 was prepared by sol-gel method. Composite CoPcS/TiO2/K2Ti4O9 was prepared by dipping. It was incandesced at various temperatures and modification effect was compared. The results showed that o...Photocatalyst CoPcS/TiO2 was prepared by sol-gel method. Composite CoPcS/TiO2/K2Ti4O9 was prepared by dipping. It was incandesced at various temperatures and modification effect was compared. The results showed that optical absorption of sample incandesce at 423K occurred significant red-shift. Light absorption width extended from ultraviolet region to visible region, especially there was an intensive absorption between 600 nm and 680 nm. X-ray diffraction spectrogram showed that TiO2 in sample still maintained anatase crystal form. Under the illumination of visible light, photocatalysis degradation experiment was taken with Eosin B as simulated pollutants. Decoloration rate of Eosin B was much improved. The rate can reach 80% in 300 minutes.展开更多
Fe（NO3）3-9H2O/Fe（HSO4）3 was used as an efficient reagent system for the oxidation of alcohols to their corresponding carbonyl compounds. All reactions were performed in the absence of solvent in good to high yield...Fe（NO3）3-9H2O/Fe（HSO4）3 was used as an efficient reagent system for the oxidation of alcohols to their corresponding carbonyl compounds. All reactions were performed in the absence of solvent in good to high yields. Under the same reaction conditions, thiols and sulfides were also converted to their corresponding disulfides and sulfoxides, respectively. 2007 Farhad Shirini. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.展开更多
文摘A series of BUC-21/N-K2Ti4O9 composites(B1NX)were facilely fabricated from BUC-21 and N-K2Ti4O9 via ball-milling,and they were fully characterized using various techniques.The photocatalytic reduction of Cr(Ⅵ)over the B1NX composites was investigated systematically under various conditions,including different light sources,pH values,hole scavengers,and inorganic ions,in both real lake water and tap water.The BUC-21/N-K2Ti4O9 composites demonstrated remarkable photocatalytic Cr(Ⅵ)reduction performance,good reusability,and stability under both UV and white light irradiation.The introduction of N-K2Ti4O9 into BUC-21 not only broadened its light absorption region to white light,but also strongly inhibited the recombination of the photo-generated electrons and holes.Mechanisms of photocatalytic Cr(Ⅵ)reduction under both UV light and white light were proposed and verified by electrochemical measurements,active species capture experiments,and ESR measurements.
文摘The interaction between β-K 4H 3 [SiW 9O 37(CpTi) 3]·11H 2O and DNA was investigated by agarose gel electrophoresis. The results suggest that β-K 4H 3[SiW 9O 37(CpTi) 3]·11H 2O can degrade the genomic DNA. The treatment of plasmid DNA with β-K 4H 3 [SiW 9O 37(CpTi) 3]·11H 2O resulted in a fast moving band in front of the three normal conformations(super coiled DNA, linear DNA and relaxed circular DNA) in agarose gel electrophoresis . These results indicate that this chemical material may have the ability to specifically cleavage DNA or to alter conformation of DNA molecules.
基金Acknowledgements： This project is supported by the fund of the Plan of Postgraduate Scientific Research Innovation of Jiangsu Province （No. CX07B_175z） and the Natural Science Foundation of Henan Province （No. 0624720029）.
文摘Photocatalyst CoPcS/TiO2 was prepared by sol-gel method. Composite CoPcS/TiO2/K2Ti4O9 was prepared by dipping. It was incandesced at various temperatures and modification effect was compared. The results showed that optical absorption of sample incandesce at 423K occurred significant red-shift. Light absorption width extended from ultraviolet region to visible region, especially there was an intensive absorption between 600 nm and 680 nm. X-ray diffraction spectrogram showed that TiO2 in sample still maintained anatase crystal form. Under the illumination of visible light, photocatalysis degradation experiment was taken with Eosin B as simulated pollutants. Decoloration rate of Eosin B was much improved. The rate can reach 80% in 300 minutes.
文摘Fe（NO3）3-9H2O/Fe（HSO4）3 was used as an efficient reagent system for the oxidation of alcohols to their corresponding carbonyl compounds. All reactions were performed in the absence of solvent in good to high yields. Under the same reaction conditions, thiols and sulfides were also converted to their corresponding disulfides and sulfoxides, respectively. 2007 Farhad Shirini. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
