Columnar BPQDs/ZnIn2S4 binary heterostructure composite photocatalytic material as well as preparation method and application thereof

The invention belongs to the technical field of photocatalytic materials, and discloses a columnar BPQDs/ZnIn2S4 binary heterostructure composite photocatalytic material as well as a preparation method and application thereof. The preparation method comprises the following steps: uniformly dispersing MIL-68 (In) serving as an indium source in a solvent A, adding a zinc source and thioacetamide, and performing hydrothermal treatment at 150-200 DEG C to obtain a columnar ZnIn2S4 material; and uniformly dispersing the ZnIn2S4 material in a solvent B, adding black phosphorus quantum dots, carrying out a stirring reaction at 50-70 DEG C for 8-24 h, and carrying out drying so as to obtain the columnar BPQDs/ZnIn2S4 binary heterostructure composite photocatalytic material. The preparation method does not need any precious metal, the raw materials are low in price, the preparation method is simple and easy to operate, and the prepared columnar BPQDs/ZnIn2S4 has good hydrogen evolution performance and stability under