Hydrothermally Constructed MoS₂/ZnIn₂S₄ Heterostructure for Promotion of Photocatalytic H₂ Evolution

The integration of the second material with unique properties into original material to fabricate heterostructure represents an effective strategy to enhance photocatalytic H₂ evolution. Herein, we synthesized a MoS₂/ZnIn₂S₄ heterostructured photocatalyst using a two-step hydrothermal method. The resulting MoS₂/ZnIn₂S₄ displayed the flower-like morphology formed by staked nanosheets, significantly accelerating photocatalytic H₂ evolution performance. The optimal MoS₂/ZnIn₂S₄ (ZIS/Mo-50) achieved remarkable photocatalytic H₂ production rate of 20.5 mmol g^-1 h^-1, which is 18.5 times higher than that of pristine ZnIn₂S₄. Further characterizations proved that the formation of the MoS₂/ZnIn₂S₄ heterostructure adjusted the energy band structure of ZnIn₂S₄, enhancing its light absorption capability. Additionally, the heterostructure facilitated efficient charge separation and transfer. These enhancements notably boosted the photocatalytic H₂ evolution, providing a promising example for designing efficient photocatalysts for H₂ evolution.