▎ 摘　　要

NOVELTY - Manufacture of a zinc cadmium sulfide-graphene composite material involves mixing (1) zinc acetate dihydrate and cadmium acetate dihydrate as precursors in ratio of 3-5:1, dissolving dimethyl sulfoxide in a solvent, adding (2) graphene oxide, stirring and dispersing to form reaction solution, transferring obtained reaction solution to a reactor, performing solvothermal reaction (3) at 160-180 degrees C for 10-14 hours, centrifuging (4) the reaction product in a centrifuge apparatus, washing with ethanol and deionized water, and vacuum drying. USE - Manufacture of zinc cadmium sulfide-graphene composite material used as photocatalyst for degrading methylthionine chloride. ADVANTAGE - The method enables manufacture of zinc cadmium sulfide-graphene composite material with effective reduction of graphene oxide to graphene, and excellent wide visible light response and photocatalytic activity, by simple process. The degradation rate of methylthionine chloride by zinc cadmium sulfide-graphene composite material is 96%. The size of zinc cadmium sulfide particles is small. The graphene is evenly distributed in composite material. DETAILED DESCRIPTION - Manufacture of a zinc cadmium sulfide (Zn0.8Cd0.2S)-graphene composite material involves mixing zinc acetate dihydrate and cadmium acetate dihydrate as precursors in ratio of 3-5:1, dissolving dimethyl sulfoxide in a solvent, adding graphene oxide, stirring and dispersing to form reaction solution, transferring obtained reaction solution to a reactor, performing solvothermal reaction at 160-180 degrees C for 10-14 hours, centrifuging the reaction product in a centrifuge apparatus, washing with ethanol and deionized water, and vacuum drying. The content of reaction solution with graphene oxide and zinc cadmium sulfide is 0.5-8:100 wt.%. The amount of zinc acetate dihydrate with respect to dimethyl sulfoxide is 0.009-0.015 mol/L.