▎ 摘　　要

NOVELTY - A graphene-copper indium disulfide nano-composite photocatalyst is prepared by chemically bonding nano-copper indium disulfide thin film to reduced graphene oxide film with atomic-scale thickness and graphene content of 0.1-10 %mass, using one-step solvothermal method. USE - Graphene-copper indium disulfide nano-composite photocatalyst for processing pharmaceutical waste water (claimed). ADVANTAGE - The graphene-copper indium disulfide nano-composite photocatalyst has unique surface structure, large narrow specific surface area, forbidden band width, high stability, excellent regenerating property, high visible light catalytic activity, and chemical oxygen demand removal rate of 86.5%. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation method of graphene-copper indium disulfide nano-composite photocatalyst, which involves (1) preparing graphene oxide using improved Hummers method, and dispersing graphene oxide in organic solvent, (2) taking inorganic cuprous salt, inorganic indium salt and sulfur source as raw materials, dissolving into the organic solution, adding the prepared graphene oxide solution, transferring the mixed solution to a reactor, and reacting at 120-180 degrees C for 8-15 hours, and (3) respectively washing the reactant with deionized water and anhydrous ethanol several times, and vacuum drying the obtained product at 60-100 degrees C for 6-24 hours.