▎ 摘　　要

NOVELTY - Preparing niobium pentoxide/graphene composite photocatalyst comprises preparing glutamic acid functionalized graphene quantum dots, compounding glutamic acid-functionalized graphene quantum dots with graphene oxide, and then compounding with niobium pentoxide nanoparticles to obtain niobium pentoxide/graphene composite photocatalyst. USE - The photocatalyst is useful in degradation of ciprofloxacin (claimed). ADVANTAGE - The method: produces product having excellent photocatalytic oxidation of ciprofloxacin under conditions i.e. filtering out ultraviolet light; is simple to operate the preparation method, and utilizes catalyst exhibits good photoactivity.