▎ 摘　　要

NOVELTY - Method for preparing visible light photocatalytic material, involves (i) ultrasonically dispersing graphene quantum dots into ultrapure water, (ii) dripping silver nitrate to the graphene quantum dots suspension solution, and magnetically stirring, and (iii) dripping sodium hydrogen phosphate to the above mixed solution, magnetically stirring in a dark environment, collecting the precipitate, washing with deionized water, separating, and drying in a vacuum oven to obtain graphene quantum dots-silver phosphate complex. USE - The method is useful for preparing visible light photocatalytic material.