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]; Leghari, Sajjad A. K.[1]; Chen, Feng[1]; Zhang, Jinlong[1,2]

机构：[1] Key Laboratory for Advanced Materials, Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China; [2] School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, 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：EI(收录号：20105013479523)

语种：英文

外文关键词：High resolution transmission electron microscopy - Photocatalysts - Bismuth - Biodegradation - Light - Phenols - X ray diffraction - Crystalline materials - Photocatalysis - X ray photoelectron spectroscopy - Catalyst activity - Chromium - Mesoporous materials - Nanocomposites - Suspensions (fluids) - Bismuth compounds

摘要：A controllable and reproducible synthesis of highly ordered two-dimensional hexagonal mesoporous, crystalline bismuth-doped TiO2 nanocomposites 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. Bismuth cleans up: Highly ordered 2D hexagonal mesoporous (ms) crystalline Bi-doped TiO2 nanocomposites that are active catalysts in the visible region have been synthesized (see figure). The photocatalytic activity of 2.0 % Bi-doped ms-TiO2 is far superior to other TiO2 catalysts for the simultaneous degradation of phenol and reduction of chromium under visible illumination. Copyright ? 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.