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 H-2 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 H-2 evolution performance. The optimal MoS2/ZnIn2S4 (ZIS/Mo-50) achieved remarkable photocatalytic H-2 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 H-2 evolution, providing a promising example for designing efficient photocatalysts for H-2 evolution.