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

Abstract

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.