文献类型：期刊文献

英文题名：Bismuth-Doped Ordered Mesoporous TiO₂: Visible-Light Catalyst for Simultaneous Degradation of Phenol and Chromium

作者：Sajjad, Shamaila[1,2];Leghari, Sajjad A. K.[1,2];Chen, Feng[1,2];Zhang, Jinlong[1,2,3]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]Guizhou Normal Univ, Sch Chem & Mat Sci, Guiyang 550001, Peoples R China

年份：2010

卷号：16

期号：46

起止页码：13795

外文期刊名：CHEMISTRY-A EUROPEAN JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000285398700027)】；

基金：This work has been supported by National Nature Science Foundation of China (20773039, 20977030), the National Basic Research Program of China (973 Program, 2007CB613301, 2010CB732306), the Science and Technology Commission of Shanghai Municipality (10520709900), and the Fundamental Research Funds for the Central Universities. S.S. and S.A.K.L. also thank the Higher Education Commission (Pakistan) for financial support.

语种：英文

外文关键词：bismuth; chromium reduction; mesoporous materials; phenol oxidation; photocatalysis

摘要：A controllable and reproducible synthesis of highly ordered two-dimensional hexagonal mesoporous, crystalline bismuth-doped TiO2 nano-composites with variable Bi ratios is reported here. Analyses by transmission electron microscopy, X-ray diffraction, Raman, and X-ray photoelectron spectroscopy reveal that the well-ordered mesostructure is doped with Bi, which exists as Bi3+ and Bi(3+x+). The Bi-doped mesoporous TiO2 (ms-TiO2) samples exhibit improved photocatalytic activities for simultaneous phenol oxidation and chromium reduction in aqueous suspension under visible and UV light over the pure ms-TiO2, P-25, and conventional Bi-doped titania. The high catalytic activity is due to both the unique structural characteristics and the Bi doping. This new material extends the spectral response from UV to the visible region, and reduces electron-hole recombination, which renders the 2.0% Bi-doped ms-TiO2 photocatalyst highly responsive to visible light.