▎ 摘　　要

NOVELTY - A zinc indium sulfide-graphene composite photocatalyst is prepared by ultrasonically dispersing graphite oxide in reducing alcohol solution; stirring zinc sulfate and indium chloride in the reducing alcohol solution to dissolve them; mixing the dispersion liquid with the obtained mixture, adding thioacetamide, and stirring; transferring the obtained reaction system into hydrothermal kettle to perform solvothermal reaction; pouring the obtain product into vacuum extraction-filtering device; and cleaning the product with de-ionized water. USE - Method for zinc indium sulfide-graphene composite photocatalyst preparation used in solar energy conversion and in environmental treatment fields, including air purification, sewage treatment, and hydrogen production via water photolysis, and production of chemical fuels such as alcohol or carbon hydrogen via photocatalysis and reduction of carbon dioxide. ADVANTAGE - The method is able to provide photocatalyst having wide responding area of visible light and high photocatalysis activity for solar energy conversion. DETAILED DESCRIPTION - Preparation of zinc indium sulfide (ZnIn2S4)-graphene composite photocatalyst responding to visible light, comprises: (A) ultrasonically dispersing graphite oxide in reducing alcohol solution; (B) stirring zinc sulfate and indium chloride in the reducing alcohol solution to dissolve them; (C) mixing the dispersion liquid with the mixture prepared in (B), adding thioacetamide, and stirring; (D) transferring the obtained reaction system into hydrothermal kettle to perform solvothermal reaction; (E) pouring the obtain product into vacuum extraction-filtering device to extract and filter the product; and (F) cleaning the product with de-ionized water, vacuum-drying, and grinding to obtain the composite photocatalyst.