The unique architecture is very significant for photocatalysts to achieve high photocatalytic efficiency. Herein, hollow Cu₂MoS₄/ZnIn₂S₄ heterostructural nanocubes with intimate-contact interface have been prepared for the first time via a self-template way, which can promote the photocatalysis hydrogen evolution. First, novel hollow structured Cu₂MoS₄ nanocubes were successfully synthesized using Cu₂O as a precursor, then the ZnIn₂S₄ nanosheets were in-situ grew on the surface of hollow Cu₂MoS₄ nanocubes. The unique hollow heterostructures have markedly enhanced photocatalytic efficiency, and 15 wt% Cu₂MoS₄/ZnIn₂S₄ sample exhibits the highest hydrogen production rate of 8103 μmol·h⁻¹·g⁻¹, which is approximately four times higher than pure ZnIn₂S₄. The improved photocatalytic performance is mainly attributed to the following two points: (1) the hollow nanocube structure can provide rich active sites and increase light absorption; (2) forming a built-in electric field is conducive to transfer the holes generated by ZnIn₂S₄ to Cu₂MoS₄, which can effectively promote charge separation. This work may provide insights for the design of hollow architecture cage materials for high photocatalytic performance.

独特的结构对于光催化剂实现高光催化效率非常重要。在此，首次通过自模板方式制备了具有紧密接触界面的空心Cu ₂ MoS ₄ /ZnIn ₂ S ₄异质结构纳米立方体，可促进光催化析氢。首先，以Cu ₂ O为前驱体成功合成了新型中空结构的Cu ₂ MoS ₄纳米立方体，然后在中空Cu ₂ MoS ₄表面原位生长了ZnIn ₂ S ₄纳米片纳米立方体。独特的空心异质结构显着提高了光催化效率，15 wt% Cu ₂ MoS ₄ /ZnIn ₂ S ₄样品的最高产氢速率为8103 μmol·h ^-1 ·g ^-1，约为纯的四倍ZnIn ₂ S ₄。光催化性能的提高主要归功于以下两点：（1）中空纳米立方体结构可以提供丰富的活性位点并增加光吸收；(2)形成内建电场有利于将ZnIn ₂ S ₄产生的空穴转移到Cu ₂ MoS ₄，可有效促进电荷分离。这项工作可能为设计具有高光催化性能的空心结构笼材料提供见解。