The integration of the second material with unique properties into original material to fabricate heterostructure represents an effective strategy to enhance photocatalytic H evolution. Herein, we synthesized a MoS/ZnInS heterostructured photocatalyst using a two-step hydrothermal method. The resulting MoS/ZnInS displayed the flower-like morphology formed by staked nanosheets, significantly accelerating photocatalytic H evolution performance. The optimal MoS/ZnInS (ZIS/Mo-50) achieved remarkable photocatalytic H production rate of 20.5 mmol g h, which is 18.5 times higher than that of pristine ZnInS. Further characterizations proved that the formation of the MoS/ZnInS heterostructure adjusted the energy band structure of ZnInS, enhancing its light absorption capability. Additionally, the heterostructure facilitated efficient charge separation and transfer. These enhancements notably boosted the photocatalytic H evolution, providing a promising example for designing efficient photocatalysts for H evolution.
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