▎ 摘　　要

NOVELTY - Composite visible light catalyzing material comprises dopamine, reduced graphene oxide and silver phosphate, where the diameter of silver phosphate is 5-20nm. The graphene oxide layer is reduced. The silver phosphate dispersion is relatively uniform, and there is no obvious aggregation phenomenon. The composite material is excited by visible light to a concentration of 20mg/l of methylene blue, and the photocatalytic degradation rate reaches 97% in 10 minutes. The 10mg/l rhodamine B solution has a photocatalytic degradation rate of 92% in 15 minutes. USE - Composite visible light catalyzing material. ADVANTAGE - The composite visible light catalyzing material ensures high degradation rate for methylene blue and rhodamine B, and broad application prospects in the field of dye wastewater removal. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing composite visible light catalyzing material, which involves: (A) dissolving graphene oxide in deionized water, and ultrasonically obtaining a graphene oxide dispersion; (B) adding silver phosphate and dopamine hydrochloride to the graphene oxide dispersion, stirring for 30 minutes to obtain a mixed precursor solution A; (C) dissolving tris-hydrochloric acid in deionized water to obtain tris-hydrochloric acid solution B; (D) mixing the mixed precursor solution A and tris-hydrochloric acid solution B, adding an appropriate amount of sodium hydroxide to ensure the pH of the solution is 8.5, and stirring at 80 degrees C for 24 hours; and (E) centrifuging the product, washing repeatedly with deionized water, and lyophilizing to obtain desired product.