▎ 摘　　要

NOVELTY - A self-cleaning composite ultrafiltration membrane is prepared by (1) preparing composite quantum dot suspension by adding graphene quantum dot/N,N-dimethylformamide solution to zinc oxide quantum dot/ethanol solution, and stirring at room temperature for 12-24 hours, and (2) preparing polyvinylidene fluoride membrane. USE - The self-cleaning composite ultrafiltration membrane is useful for treating wastewater containing bovine serum protein. ADVANTAGE - The self-cleaning composite ultrafiltration membrane: has prolonged service life; treats wastewater to protect aquatic ecological environment to a preset extent and alleviate the problem of water shortage; and adopts graphene oxide quantum dots, which are used to modify zinc oxide and prepare bifunctional composite particles with nano zinc oxide as core and quantum dots as outer shell, and have excellent photocatalytic effect and hydrophilicity.