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ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2013,Vol.29>> Issue(07)>> 1558-1565     doi: 10.3866/PKU.WHXB201304161         中文摘要
CATALYSIS AND SURFACE SCIENCE
Investigation on Photocatalytic Reduction of CO2into CH4 Using SrB2O4/SrCO3Composite Catalyst
GUO Li-Mei1, KUANG Yuan-Jiang2, YANG Xiao-Dan1, YU Yan-Long1, YAO Jiang-Hong1, CAO Ya-An1
1 Key Laboratory of Weak-Light Nonlinear Photonics, Ministry of Education, TEDA Applied Physics School and School of Physics, Nankai University, Tianjin 300457, P. R. China;
2 Maintenance Training Center, Zhenjiang Watercraft College, Zhenjiang 212000, Jiangsu Province, P. R. China
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An SrB2O4/SrCO3composite catalyst is synthesized by the simple sol-gel method. Reduction of carbon dioxide into methane in the presence of water is used to evaluate the photocatalytic activity of the composite catalyst. SrB2O4/SrCO3exhibits better photocatalytic performance than TiO2(P25) and SrB2O4 under irradiation with UV light. The crystalline structure, crystallite size, and the BET surface areas of the resultant photocatalysts are studied via the techniques of X-ray diffraction (XRD), transmission electron microscopy (TEM), and nitrogen adsorption-desorption isotherms. The energy levels of the SrB2O4/SrCO3 photocatalyst are determined from characterization with UV-Vis diffuse reflectance absorption spectra, X-ray photoelectron spectroscopy (XPS), and photoluminescence (PL) measurements. The heterojunction formed at the SrB2O4/SrCO3interface efficiently promotes photogenerated carrier separation and increases the use of photogenerated carriers in photocatalytic reactions at the solid/liquid interface, resulting in high photocatalytic activity under UV light.



Keywords: SrB2O4/SrCO3composite catalyst   Photocatalytic reduction of CO2   CH4   Photocatalytic activity  
Received: 2013-02-15 Accepted: 2013-04-15 Publication Date (Web): 2013-04-16
Corresponding Authors: CAO Ya-An Email: caoyaan@yahoo.com

Fund: The project was supported by the National Natural Science Foundation of China (51072082, 21173121).

Cite this article: GUO Li-Mei KUANG Yuan-Jiang YANG Xiao-Dan YU Yan-Long YAO Jiang-Hong CAO Ya-An. Investigation on Photocatalytic Reduction of CO2into CH4 Using SrB2O4/SrCO3Composite Catalyst[J]. Acta Phys. -Chim. Sin., 2013,29 (07): 1558-1565.    doi: 10.3866/PKU.WHXB201304161

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