Chinese Journal of Catalysis ›› 2014, Vol. 35 ›› Issue (10): 1609-1618.DOI: 10.1016/S1872-2067(14)60170-4

• Review • Previous Articles     Next Articles

Design and fabrication of heterojunction photocatalysts for energy conversion and pollutant degradation

Changlin Yua, Wanqin Zhoua, Jimmy C. Yub, Hong Liuc, Longfu Weia   

  1. a School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China;
    b Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China;
    c Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
  • Received:2014-05-24 Revised:2014-06-05 Online:2014-09-28 Published:2014-09-30
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21067004, 21263005), Young Science and Technology Project of Jiangxi Province Natural Science Foundation (20133BAB21003), Young Scientist Training Project of Jiangxi Province (20122BCB23015), the Implement Project of Science and Technology of Colleges and Universities in Jiangxi Province (KJLD14046), and One Hundred Talents Program of Chinese Academy of Sciences.

Abstract:

Photocatalysis has attracted much attention for its promise in converting solar energy to chemical energy and in degrading various pollutants. Many recent investigations have demonstrated photocatalysts with well-defined junctions between two semiconductors with matched electronic band structures. Such structures effectively facilitate charge transfer and suppress recombination of photogenerated electrons and holes, leading to extremely high activity and stability. In this review, we focus on the influence of the heterojunction on the performance of semiconductor photocatalysts, including TiO2-based, ZnO-based, and Ag-based semiconductor photocatalysts. We also investigate fabrication methods for heterojunctions and attempt to understand the mechanisms behind photocatalysis. Finally, we propose challenges to design and clarify the mechanism for enhancing the effect of the heterojunction on photocatalyst performance.

Key words: Photocatalyst, Heterojunction, Semiconductor, Photocatalytic performance, Organic pollutant degradation, Hydrogen production