▎ 摘　　要

NOVELTY - Preparing silver phosphate/oxidized graphene visible light photo-catalyst by low temperature liquid phase precipitation comprises (i) dissolving silver nitrate and organic acid in a mixed solution of alcohol solvent and de-ionized water, adding graphene oxide aqueous dispersion, stirring at a constant temperature of 25 degrees C for 0.5-1.5 hours, adding an aqueous solution of sodium dihydrogen phosphate, stirring and reacting, adjusting the reaction process to pH 4-8 with 10% aqueous solution of sodium hydroxide, centrifuging the product, washing with de-ionized water and absolute ethanol for 3-5 times, centrifuging and separating, drying and grinding; and (ii) balancing the photocatalytic degradation of the dye solution by the silver phosphate/graphene oxide photocatalyst when the white LED lamp is illuminated for 18-25 minutes, reaching the photocatalytic dye degradation rates of silver phosphate/graphene oxide photocatalysts for 10 mg/l and 50 mg/l dye solutions 85-99.5% and 38-51%. USE - The method is useful for preparing silver phosphate/oxidized graphene visible light photo-catalyst by low temperature liquid phase precipitation. ADVANTAGE - The high specific surface area of the graphene oxide improves the adsorption performance of the photocatalyst on the dye and the good conductivity promotes the separation of the photogenerated electrons and holes and has the synergistic effect of the adsorption-enrichment-photocatalytic degradation of the adsorption. The method is simple and easy. DETAILED DESCRIPTION - Preparing silver phosphate/oxidized graphene visible light photo-catalyst by low temperature liquid phase precipitation comprises (i) dissolving silver nitrate and organic acid in a mixed solution of alcohol solvent and de-ionized water, adding graphene oxide aqueous dispersion with a mass volume concentration of 5 mg/ml, stirring at a constant temperature of 25 degrees C for 0.5-1.5 hours, adding an aqueous solution of sodium dihydrogen phosphate having a mass concentration of 10%, stirring and reacting at 25-45 degrees C for 1-5 hours, adjusting the reaction process to pH 4-8 with 10% aqueous solution of sodium hydroxide, centrifuging the product, washing with de-ionized water and absolute ethanol for 3-5 times, centrifuging and separating, drying and grinding to obtain silver phosphate/graphene oxide visible light photo-catalyst, where the mass ratio of silver nitrate, sodium dihydrogen phosphate, graphene oxide, alcohol solvent and de-ionized water is 0.5-2:0.5-2:0.005-0.15:25-50:25-50 and the molar ratio of organic acid and silver nitrate is 1-2:1-2; and (ii) balancing the photocatalytic degradation of the dye solution by the silver phosphate/graphene oxide photocatalyst when the white LED lamp is illuminated for 18-25 minutes, reaching the photocatalytic dye degradation rates of silver phosphate/graphene oxide photocatalysts for 10 mg/l and 50 mg/l dye solutions 85-99.5% and 38-51%, respectively when the white LED light is illuminated for 25 minutes and recycling 5 cycles to reach the photocatalytic dye degradation rate of the silver phosphate/graphene oxide photocatalyst 66-85% of the first photocatalytic dye degradation rate.