▎ 摘　　要

NOVELTY - Preparation of nano-silver/graphene composite material, involves mixing prepared silver-ammonia solution, surfactant and complexing agent in reducing alcohol, then adding graphene oxide, and carrying out ultrasonic dispersion to obtain uniform suspension, adding reducing agent to suspension and transferring mixture to reaction vessel to obtain mixed solution, passing carbon dioxide gas and heating mixture, stirring the mixed solution autoclave, cooling the mixture, washing precipitate by centrifugation, and drying in vacuum, to obtain a nano-silver/graphene composite material. USE - Preparation of nano-silver/graphene composite material (claimed). ADVANTAGE - The nano-silver/graphene composite material is environmentally-friendly and is obtained with single phase. The load is controllable and particle size is small and evenly distributed between the graphene nano-sheets. DETAILED DESCRIPTION - Preparation of nano-silver/graphene composite material, involves mixing prepared silver-ammonia solution, surfactant and complexing agent in reducing alcohol, then adding graphene oxide, and carrying out ultrasonic dispersion to obtain a uniform suspension, adding reducing agent to the suspension and rapidly transferring the mixture to reaction vessel to obtain mixed solution, and then passing carbon dioxide gas and heating the mixture under preset pressure and temperature, so that carbon dioxide reaches supercritical state, stirring the mixed solution in the autoclave, cooling the mixture, washing the precipitate by centrifugation, and drying in vacuum, to obtain a nano-silver/graphene composite material.