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

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• 作者：Yangang Wang^a ; ^{ygwang8136@gmail.com} ; Bo Li^b ; Chengli Zhang^b ; Lifeng Cui^a ; Shifei Kang^b ; Xi Li^b ; ^{xi_li@fudan.edu.cn} ; Lihui Zhou^c
• 关键词：Ordered mesoporous ; CeO2-TiO2 composites ; Nanocasting route ; Photocatalyst ; Reduction of CO2
• 刊名：Applied Catalysis B: Environmental
• 出版年：2013
• 出版时间：7 February, 2013
• 年：2013
• 卷：130-131
• 期：Complete
• 页码：277-284
• 全文大小：1386 K

文摘

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.