Chinese Journal of Catalysis ›› 2017, Vol. 38 ›› Issue (12): 1936-1955.DOI: 10.1016/S1872-2067(17)62962-0

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A review on TiO2-based Z-scheme photocatalysts

Kezhen Qia,b, Beichenga, Jiaguo Yua,d, Wingkei Hoc   

  1. a State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, Hubei, China;
    b Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, Liaoning, China;
    c Department of Science and Environmental Studies, the Education University of Hong Kong, Tai Po, N. T. Hong Kong, China;
    d Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
  • Received:2017-10-18 Revised:2017-10-31 Online:2017-12-18 Published:2017-12-29
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (51602207, 21433007, 51320105001, 21573170), the Self-determined and Innovative Research Funds of SKLWUT (2017-ZD-4, 2016-KF-17), and the Natural Science Foundation of Hubei Province of China (2015CFA001).

Abstract:

TiO2-based Z-scheme photocatalysts have attracted considerable attention because of the low recombination rate of their photogenerated electron-hole pairs and their high photocatalytic efficiency. In this review, the reaction mechanism of Z-scheme photocatalysts, recent research progress in the application of TiO2-based Z-scheme photocatalysts, and improved methods for photocatalytic performance enhancement are explored. Their applications, including water splitting, CO2 reduction, decomposition of volatile organic compounds, and degradation of organic pollutants, are also described. The main factors affecting the photocatalytic performance of TiO2-based Z-scheme photocatalysts, such as pH, conductive medium, cocatalyst, architecture, and mass ratio, are discussed. Concluding remarks are presented, and some suggestions for the future development of TiO2-based Z-scheme photocatalysts are highlighted.

Key words: TiO2, Z-scheme photocatalyst, Water splitting, CO2 reduction, Pollutant degradation