▎ 摘　　要

NOVELTY - Ternary composite visible photocatalyst comprises silver phosphate/reduced graphene oxide/lanthanum, chromium-doped strontium titanium oxide ternary complex, silver phosphate is coated with reduced grained graphene, outside the reduction of graphene oxide dispersed with lanthanum, chromium-doped strontium titanium oxide particles. USE - The catalyst is useful for degrading organic dyes (claimed). ADVANTAGE - The catalyst has high catalytic activity, stability and high degradation effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing ternary composite visible light catalyst comprising (a) adding silver phosphate aqueous solution into graphene oxide dispersion liquid, stirring evenly, adding disodium phosphate solution, stirring, reduction under illumination condition to which reduction-oxidation graphene composite material to obtain silver phosphate/reduced graphene oxide composites, (b) taking titanate source, strontium, lanthanum, chromium source under alkaline condition carrying out hydrothermal reaction at 170-190 degrees C, washing and drying to obtain lanthanum, chromium-doped strontium titanium oxide, and (c) dispersing lanthanum, chromium-doped strontium titanium oxide into the silver phosphate/ reduced graphene oxide dispersion liquid, continuously stirring, washing and drying.