Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (07): 1558-1565.doi: 10.3866/PKU.WHXB201304161

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

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. 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
  • Received:2013-02-15 Revised:2013-04-15 Published:2013-06-14
  • Contact: CAO Ya-An
  • Supported by:

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


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.

Key words: SrB2O4/SrCO3composite catalyst, Photocatalytic reduction of CO2, CH4, Photocatalytic activity