▎ 摘　　要

NOVELTY - Preparation of photocatalytic film involves (1) preparing polydopamine/reduced graphene oxide/silver phosphate composite material, (2) preparing pure polyvinylidene fluoride film, (3) and applying prepared composite material to pure polyvinylidene fluoride film by vacuum filtration. USE - Preparation of photocatalytic film for degradation of methylene blue under illumination (claimed) and dye wastewater treatment. ADVANTAGE - The method is simple, economical and non polluting. The reduced graphene oxide and silver phosphate having photocatalytic properties and chemical stability are added during coating modification process to achieve photocatalytic and anti-contamination properties of the composite film. The composite film prepared has excellent hydrophilicity, high methylene blue removal rate and excellent pollution resistance.