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

Water Science and Engineering

Xiao-fei Yang¹  Cheng-xiao Zhao¹  Yi Lu¹  Xing-kai Cui² 

[1] College of Science, Nanjing Forestry University, Nanjing 210037, China;School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;

关键词: Z-scheme;    Graphitic carbon nitride;    MoS2;    Ag3PO4;    Oxygen evolution reaction;    Water splitting;   

DOI  :  

来源: DOAJ

【 摘 要 】

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 that was similar to the Z-scheme with intimate interface contact exhibited a strong 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 in order to improve the quality of water and rehabilitate the water environment.

【 授权许可】

Unknown