Volume 13 Issue 4
Dec.  2020
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Article Navigation >  Water Science and Engineering  > 2020  >  13(4): 299-306
Yi Lu, Xing-kai Cui, Cheng-xiao Zhao, Xiao-fei Yang. 2020: Highly efficient tandem Z-scheme heterojunctions for visible light-based photocatalytic oxygen evolution reaction. Water Science and Engineering, 13(4): 299-306. doi: 10.1016/j.wse.2020.12.005
Citation: Yi Lu, Xing-kai Cui, Cheng-xiao Zhao, Xiao-fei Yang. 2020: Highly efficient tandem Z-scheme heterojunctions for visible light-based photocatalytic oxygen evolution reaction. Water Science and Engineering, 13(4): 299-306. doi: 10.1016/j.wse.2020.12.005
shu

Highly efficient tandem Z-scheme heterojunctions for visible light-based photocatalytic oxygen evolution reaction

doi: 10.1016/j.wse.2020.12.005

  • a College of Science, Nanjing Forestry University, Nanjing 210037, China

  • b School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China

Funds:  This work was supported by the National Natural Science Foundation of China (Grant No. 21975129) and the Start-up Fund from Nanjing Forestry University.
More Information
  • Corresponding author: Xiao-fei Yang
  • Received Date: 2020-09-03
  • Rev Recd Date: 2020-11-12
    Abstract
  • Oxygen is important in maintaining a clean and reliable water environment. Designing heterojunction photocatalysts that can evolve oxygen from water splitting through an artificial Z-scheme pathway is a promising strategy for solving environmental problems. In this study, flower-like MoS2 nanostructures were fabricated via a simple hydrothermal process, and the electrostatic-based assembly ion-exchange method was used to construct a tandem Ag3PO4/MoS2/g-C3N4 (AMC) heterojunction. The as-synthesized photocatalyst exhibited significant improvements in harvesting visible light and transporting charge carriers. Moreover, the catalyst similar to the Z-scheme with intimate interface contact exhibited high oxygen evolution performance. The oxygen evolution activity of the optimal AMC-10 catalyst was approximately 11 times that of the pristine Ag3PO4. The results indicated that addition of a small amount of the flower-like MoS2 could significantly enhance the efficiency of oxygen evolution by the heterojunction. The findings in this study provide an alternative pathway for rationally designing efficient oxygen-evolving photocatalysts to improve the quality of water and rehabilitate the water environment.

     

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