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 Ag3 PO4/MoS2/g-C3 N4（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 Ag3 PO4.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.
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