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

被引：227
|
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] Shanghai Univ Sci & Technol, Sch Environm & Architecture, Shanghai 200093, Peoples R China
[2] Fudan Univ, Dept Environm Sci & Engn, Shanghai 200433, Peoples R China
[3] E China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2013年 / 130卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Ordered mesoporous; CeO2-TiO2; composites; Nanocasting route; Photocatalyst; Reduction of CO2; GEL DERIVED TITANIA; SUPPORTED TIO2; MIXED OXIDES; PHOTOREDUCTION; ARRAYS; CEO2; SIZE;
D O I：
10.1016/j.apcatb.2012.11.019
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
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. (c) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：277 / 284
页数：8
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