▎ 摘　　要

NOVELTY - The preparation method of oxidized graphene/silver phosphate composite photocatalyst involves (i) ultrasonically dispersing oxidized graphene in water to obtain an oxidized graphene dispersion, (ii) dripping an aqueous silver nitrate solution to oxidized graphene dispersion, and stirring in a dark environment to obtain a mixed dispersion, (iii) dripping an aqueous disodium hydrogen phosphate solution to mixed dispersion, stirring, darkening, centrifuging, washing, and drying. USE - Preparation of oxidized graphene/silver phosphate composite photocatalyst used in catalytic degradation of organic contaminant e.g. rhodamine B (all claimed). ADVANTAGE - The method enables the preparation of oxidized graphene/silver phosphate composite photocatalyst easily by simple process under visible light irradiation with high photocatalytic activity and stability.