▎ 摘　　要

NOVELTY - Photo degrading organic dye comprises (i) preparing silver sulfide quantum dot stock solution, mixing ultrasonically with the graphene oxide powder to obtain a silver sulfide quantum dot-graphene oxide mixed solution; and (ii) heating in an oxygen-free environment to obtain a graphene hydrogel containing silver sulfide quantum dots, adding into wastewater containing organic dyes, agitating in dark, and subjecting finally to photo catalytic degradation under light irradiation. USE - The method is useful for photo degrading organic dye. ADVANTAGE - The method: utilizes influence of quantum size effect of silver sulfide quantum dots for photo catalytic degradation of organic dyes and mild reaction conditions; has good catalytic effect and rapid degradation rate; and is easy to control.