▎ 摘　　要

NOVELTY - Method for preparing a flexible composite catalytic membrane involves pretreating the graphene to obtain graphene oxide, preparing perylene diimide supramolecular photocatalyst, physically dispersing the perylene diimide supramolecular photocatalyst to obtain a perylene diimide supramolecular photocatalyst dispersion, adding the graphene oxide to the perylene diimide supramolecular photocatalyst dispersion and mixing, physically separating the graphene oxide/perylene diimide supramolecular photocatalyst dispersion liquid, using a knife coating method to obtain multiple films on the graphene oxide/perylene diimide supramolecular photocatalyst solid, and dripping the perylene diimide supramolecular photocatalyst to each of the thin films to obtain a graphene/perylene diimide supramolecular photocatalyst composite flexible photocatalytic film. USE - The method preparing a flexible composite catalytic membrane, which is used for treating antibiotics wastewater (claimed). ADVANTAGE - The method prepares composite photocatalytic film by a simple scraping method, that is easily recyclable and responsive to visible light, and has a high degradation efficiency for organic pollutants under visible light irradiation, where the degradation rate can reach 92.31%. DETAILED DESCRIPTION - Method for preparing a flexible composite catalytic membrane involves pretreating the graphene to obtain graphene oxide, preparing perylene diimide supramolecular photocatalyst, physically dispersing the perylene diimide supramolecular photocatalyst to obtain a perylene diimide supramolecular photocatalyst dispersion, adding the graphene oxide to the perylene diimide supramolecular photocatalyst dispersion and mixing to obtain a graphene oxide/perylene diimide supramolecular photocatalyst dispersion, where the mass ratio of the graphene oxide to the perylene diimide supramolecular photocatalyst dispersion is 1:0.025-0.3, physically separating the graphene oxide/perylene diimide supramolecular photocatalyst dispersion liquid to obtain graphene oxide/perylene diimide supramolecular photocatalyst solid, using a knife coating method to obtain multiple films on the graphene oxide/perylene diimide supramolecular photocatalyst solid, and dripping the perylene diimide supramolecular photocatalyst to each of the thin films to obtain a graphene/perylene diimide supramolecular photocatalyst composite flexible photocatalytic film.