文献类型：期刊文献

英文题名：TiO₂ Nanoparticles Incorporated with Graphite Particles: An Efficient Photocatalyst for the Photocatalytic Reduction of Cr(VI) Ions in Aqueous Solution

作者：Long, Yingzhao[1];Lu, Ying[1];Lu, Yi[1];Kang, Shi-Zhao[2];Mu, Jin[1]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]Shanghai Inst Technol, Dept Chem Engn, Shanghai, Peoples R China

年份：2011

卷号：32

期号：2

起止页码：213

外文期刊名：JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000288593500009)】；

基金：This research was financially supported by National High Technology Research and Development Program of China (No. 2009AA05Z101).

语种：英文

外文关键词：Cr(VI) photocatalytic reduction; graphite; TiO2

摘要：TiO2 nanoparticles incorporated with carboxyl-modified graphite (Graphite-COOH) were prepared in a solvothermal process. By comparison with TiO2 nanoparticles (Degussa P25), the TiO2 nanoparticles incorporated with Graphite-COOH display higher photocatalytic activity with 98% of reduction efficiency of Cr(VI) ions after 1.5 hours ultraviolet (UV) irradiation. In order to investigate the effect of the graphite particles on the photocatalytic activity of TiO2 nanoparticles, diffuse reflectance UV-vis spectra (DRS), and photocurrent-potential curves were measured. The results indicate that the enhanced photocatalytic activity may be ascribed to the easier migration of photogenerated electrons to the TiO2 surface because of the introduction of graphite.