▎ 摘　　要

NOVELTY - Nano composite material comprises nano graphene sheet, silver phosphate, silver nanoparticles and silver nano-crystal containing graphene nano sheet closely coated on surface of silver phosphate nanoparticles, with grain diameter of silver phosphate nanoparticle of 200 nm, and silver nano-crystal size of 5-10 nm. USE - Nano composite material. ADVANTAGE - The composite material is stable. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of nano composite material comprising: (A) adding graphene oxide powder in deionized water of graphene oxide dispersion liquid, ultrasonically dispersing, adding disodium hydrogen phosphate solid in deionized water of disodium hydrogen phosphate solution, and ultrasonically dispersing uniformity to obtain 0.01-0.1 mol/L disodium hydrogen phosphate solution; (B) adding silver nitrate solid of precursor in dispersion liquid in graphene oxide, concentration of silver nitrate of 0.04-0.4 mol/L, and stirring to obtain precursor solution A; and (C) adding disodium hydrogen phosphate solution to precursor solution A, magnetically stirring in absence of light, at mol ratio of disodium hydrogen phosphate and silver nitrate of 1:4, dripping rear mixed solution at room temperature, magnetically stirring for 0.5-2 hours, and the precipitate is centrifugal rear separating and using de-ionized water, absolute ethyl alcohol repeatedly washing multi-time, vacuum drying in rear in absolute ethyl alcohol, ultrasonically dispersing uniformity to obtain 1-5 mg/ml precursor solution B, adding precursor solution B while magnetically stirring under visible light for 10-30 minutes, centrifugally separating, washing using deionized water and absolute ethyl alcohol, vacuum drying to obtain nano composite material.