▎ 摘　　要

NOVELTY - Complex photocatalyst is prepared by (a) mixing silver acetate and indium acetate in dodecyl mercaptan, heating, dissolving e.g. sulfur powder in dodecanethiol, transferring into flask, heating, adding ethanol, centrifuging, filtering and drying to obtain silver indium sulfide (AgInS2) quantum dot precursor, and (b) dissolving e.g. sodium molybdate in deionized water, adding the AgInS2 quantum dot precursor and graphene oxide powder, stirring, subjecting to ultrasonic homogenization, calcining, cooling, centrifuging, collecting sample, washing and drying. USE - The photocatalyst is used in catalytic degradation of antibiotic wastewater in visible light (claimed). DETAILED DESCRIPTION - Complex photocatalyst is prepared by (a) adding silver acetate (AgCH3COO) and indium acetate (In(CH3COO)3) to dodecyl mercaptan (DT), mixing in a three neck flask, heating the mixture at 150 degrees C for 2 hours under argon, dissolving the sulfur powder and dodecylamine in dodecanethiol, transferring the dissolved mixture rapidly into the flask, heating at 240 degrees C, cooling the solution to room temperature after completing the reaction, adding ethanol to form a precipitate, centrifuging the mixture, washing ethanol and redispersing the precipitate in n-hexane, repeating the above-mentioned steps for purifying the sample, filtering and drying to obtain solid silver indium sulfide (AgInS2) quantum dot precursor, and (b) dissolving sodium molybdate (Na2MoO4.2H2O) and thiourea (CH4N2S) in deionized water to obtain molybdenum disulfide (MoS2) precursor, adding the AgInS2 quantum dot precursor obtained in the step (a) and suitable amount of graphene oxide (GO) powder, stirring, subjecting the mixed solution to ultrasonic homogenization, transferred to an autoclave, calcining at 180 degrees C for 24 hours, cooling the solution to room temperature, centrifuging, collecting the sample, washing with deionized water and ethanol, and drying.