Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (12): 2911-2916.doi: 10.3866/PKU.WHXB201208011

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Polymerizable Complex Synthesis of Protonated Form of Layered Perovskite K0.5La0.5Bi2Ta2O9 for Water Splitting into Hydrogen

CHEN Wei1, GAO Han-Yang1, YANG Yu1, LIN Pei-Bin1, YUAN Jian1, SHANGGUAN Wen-Feng1, SU Jia-Chun2, SUN Yang-Zhou2   

  1. 1 Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, Shanghai 200240, P. R. China;
    2 CNOOC New Energy Investment Co. Ltd. Beijing 100016, P. R. China
  • Received:2012-07-06 Revised:2012-07-27 Published:2012-11-14
  • Supported by:

    The project was supported by the National Key Basic Research and Development Program(973) (2009CN220000) and National Natural Science Foundation of China (20973110).

Abstract:

The protonated layered perovskite oxide H1.9K0.3La0.5Bi0.1Ta2O7 (HKLBT) was prepared from K0.5La0.5Bi2Ta2O9 (KLBT) by H ion-exchange, and subsequently characterized by thermogravimetric analysis (TG-DSC), X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS), and X-ray photoelectron spectroscopy (XPS). The effects of the calcining temperature on the material's photocatalytic activity were also investigated. Results showed that HKLBT with high crystalline quality could be synthesized at low temperatures and that HKLBT prepared from KLBT calcined at 900℃ exhibited the greatest photocatalytic activity, with an average water splitting hydrogen evolution rate of 236.6 μmol·h-1 in pure water. The time course of water splitting indicated HKLBT has ability to split water into hydrogen and oxygen with long-term stability.

Key words: Photocatalysis, Water splitting, Layered perovskite, Acid treatment

MSC2000: 

  • O643