文献类型：期刊文献

英文题名：Ordered mesoporous CeO2-TiO2 composites: Highly efficient photocatalysts for the reduction of CO2 with H2O under simulated solar irradiation

作者：Wang, Yangang[1]; Li, Bo[2]; Zhang, Chengli[2]; Cui, Lifeng[1]; Kang, Shifei[2]; Li, Xi[2]; Zhou, Lihui[3]

机构：[1] School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China; [2] Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China; [3] School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China

年份：2013

卷号：130-131

起止页码：277

外文期刊名：Applied Catalysis B: Environmental

收录：EI(收录号：20125115815959)

语种：英文

外文关键词：Irradiation - Solar radiation - X ray diffraction - X ray photoelectron spectroscopy - Titanium dioxide - Gas adsorption - Carbon dioxide - Cerium oxide - High resolution transmission electron microscopy - Mesoporous materials

摘要：Ordered mesoporous CeO2-TiO2 composites with 2D hexagonal structure and varied compositions were synthesized through a nanocasting route using ordered mesoporous SBA-15 as the template. X-ray diffraction, nitrogen adsorption-desorption, transmission electron microscopy, X-ray photoelectron spectroscopy and UV-vis diffuse reflectance spectra analysis techniques were used to characterize the samples. It is observed that the obtained CeO2-TiO2 composites have ordered 2D hexagonal mesostructures with high specific surface area and hierarchical porosity. Introduction of CeO2 species can effectively extend the spectral response from UV to visible area and enhance the surface chemisorbed oxygen of the ordered mesoporous TiO2. Due to the peculiar composition and structural characteristics, these ordered mesoporous CeO2-TiO2 composites exhibited excellent photocatalytic activity in the reduction of CO2 with H2O under simulated solar irradiation. ? 2012 Elsevier B.V.