▎ 摘　　要

NOVELTY - Preparing silver/graphene nano-composite material comprises ultrasonically dispersing photocatalyst nano tungsten trioxide grain and adding graphene oxide and silver nitrate to obtain dispersion liquid; adding reductive desulfurization solvent in the dispersion liquid to obtain a bi-solvent system, transferring into the photo-catalytic reactor, performing photocatalytic reduction reaction, adding the bi-solvent system into the round bottom flask, adding sodium borohydride powder, reacting, adding the hot bi-solvent system into a vacuum filtration device, filtering, drying and grinding. USE - The method is useful for preparing silver/graphene nano-composite material. ADVANTAGE - The method produces highly uniform silver/graphene nano-composite, and is environmental friendly. DETAILED DESCRIPTION - Preparing silver/graphene nano-composite material comprises (i) ultrasonically dispersing photocatalyst nano tungsten trioxide grain in deionized water for 1-5 hours and adding graphene oxide and silver nitrate to obtain dispersion liquid; (ii) adding reductive desulfurization solvent in the dispersion liquid to obtain a bi-solvent system, through nitrogen, exhausting the dissolved oxygen in the solution, transferring into the photo-catalytic reactor, performing photocatalytic reduction reaction for 1-5 hours under the sunlight simulation; (iii) adding the bi-solvent system into the round bottom flask, adding sodium borohydride powder and under 80 degrees C, reacting to remove nano tungsten trioxide grain, where the reaction time is 0.5-1 hour; (iv) adding the hot bi-solvent system into a vacuum filtration device, suction filtering, washing with deionized water, vacuum drying and grinding. An INDEPENDENT CLAIM is also included for the silver/graphene nanocomposite material, prepared by the above mentioned method.