A review on TiO₂-based Z-scheme photocatalysts

Kezhen QI, Bei CHENG, Jiaguo YU, Wing Kei HO

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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. Copyright © 2017 Dalian Institute of Chemical Physics, the Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)1936-1955
JournalChinese Journal of Catalysis
Volume38
Issue number12
DOIs
Publication statusPublished - 2017

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Citation

Qi, K., Cheng, B., Yu, J., & Ho, W. (2017). A review on TiO₂-based Z-scheme photocatalysts. Chinese Journal of Catalysis, 38(12), 1936-1955.

Keywords

  • TiO₂
  • Z-scheme photocatalyst
  • Water splitting
  • CO₂ reduction
  • Pollutant degradation