▎ 摘　　要

NOVELTY - A composite visible light catalyst comprises 75 wt.% kuramite (Cu3SnS4) and 25 wt.% graphene. USE - Composite visible light catalyst used for solar photocatalytic decomposition of organic pollutant. ADVANTAGE - The method is simple and environment-friendly. The composite catalyst has high visible light catalytic activity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of composite visible light catalyst comprising adding 0.060 g cupric acetate monohydrate , 0.030 g thioacetamide and 0.035 g tin tetrachloride pentahydrate in 45 ml N,N-dimethylformamide, and stirring at room temperature to obtain solution; ultrasonically dispersing 0.015 g graphite oxide in 10 ml anhydrous ethanol to obtain graphene oxide suspension; adding dropwise suspension in solution and stirring for 1 hour; transferring into Teflon liner reaction kettle and crystallizing at 180-200 degrees C for 12 hours; and filtering, washing, and drying until graphene content of 25%.