▎ 摘　　要

NOVELTY - Preparation of molybdenum disulfide (MoS2)/tin(IV) sulfide (SnS2)/reduced graphene oxide (r-GO) composite photo-catalyst comprises preparing SnS2 precursor; placing thioacetamide and sodium molybdate in deionized water, adding r-GO to form mixed solution; adding SnS2 precursor into mixed solution, stirring, pouring into vacuum reaction kettle into drying box for hydrothermal treatment, taking out and cooling naturally to room temperature, washing with deionized water and ethanol and drying. USE - The method is preparation of molybdenum disulfide (MoS2)/tin(IV) sulfide (SnS2)/reduced graphene oxide (r-GO) composite photo-catalyst for reduction of carbon dioxide (claimed). ADVANTAGE - The method is simple and does not cause waste resource and formation of secondary pollutants. It is environment-friendly and a high-efficient pollution treatment.