▎ 摘　　要

NOVELTY - A method for preparing a broad-spectrum responsive type antibacterial composite film comprises mixing MIL-101 (iron) powder and graphene quantum dots (GQDs) in deionized water, and stirring and reacting in dark, washing with deionized water, and drying under vacuum to obtain MIL-101 (Fe)/GQDs, and dispersing the obtained MIL-101 (Fe)/GQDs in dopamine solution, adding polyvinylidene fluoride (PVDF) base film, and shaking the reaction, obtaining MIL-101 (Fe)/GQDs/PVDF composite membrane by washing with water and ultrasonically washing with ethanol in sequence, where the membrane is the broad-spectrum responsive antibacterial composite film. USE - The method is used for preparing broad-spectrum response type antibacterial composite film, which is used in treatment of Escherichia coli wastewater or Staphylococcus aureus wastewater (all claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a photocatalytic sterilization method comprising adding the broad-spectrum response type antibacterial composite film to the wastewater containing Escherichia colior Staphylococcus aureus, and irradiating with visible light after the adsorption balance in the dark and carrying out photocatalytic sterilization.