▎ 摘　　要

NOVELTY - Preparing graphene hydrogel comprises mixing the silver sulfide quantum dot stock solution with graphene oxide, and heating at 100-300 degrees C for 0.5-10 hours. USE - The graphene hydrogel is useful for treating wastewater containing organic dyes (claimed). ADVANTAGE - The method is simple and easy to operate. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for use of graphene hydrogel for treating wastewater containing organic dyes, comprising adsorbing the graphene hydrogel with wastewater containing organic dye, where the adsorption rotation speed is 50-500 revolutions/minute (rpm), adsorbing at 0-40 degrees C for 0.1-10 hours.