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

Authors: Yangang Wang, Bo Li, Chengli Zhang, Lifeng Cui, Shifei Kang, Xi Li, Lihui Zhou

Abstract:
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. Xray 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.

Keywords:
Ordered mesoporous
CeO₂-TiO₂ composites
Nanocasting route
Photocatalyst
Reduction of CO₂

Published in: Applied Catalysis B: Environmental (Volumes 130–131, Pages 1-336, 7 February 2013)

Publisher: Elsevier  

ISSN Information: 0926-3373

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

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