▎ 摘　　要

NOVELTY - Preparation of graphene-silver nanoparticle composite material includes preparing aqueous solution of graphene oxide by dispersing graphene oxide into deionized water; ultrasonically processing; preparing silver nitrate solution and diluted ammonia water solution into silver-ammonia solution; adding prepared silver-ammonia solution to ultrasonically processed graphene oxide solution; stirring; preheating; adding glucose into the prepared solution; reacting; using deionized water in extracting and filtering the reaction products for multiple times; and vacuum drying. USE - Preparation of graphene-silver nanoparticle composite material (claimed). ADVANTAGE - The method uses non-toxic, environmentally friendly glucose as reducing agent; and simultaneously reduces graphene oxide and silver-ammonia ions under mild conditions to obtain in-situ composite material comprising silver nanoparticles, which have narrow particle distribution and uniform particle size (i.e. 25 nm). It is easy, simple, and efficient. The silver nanoparticles can be perfectly inserted into graphene film; and aggregation of graphene is prevented. DETAILED DESCRIPTION - Preparation of graphene-silver nanoparticle composite material comprises: (A) preparing aqueous solution of graphene oxide by dispersing graphene oxide into deionized water at 0.5-2 mg/ml ratio; and ultrasonically processing the solution at 50 KHz and 500 W power for 30-60 minutes; (B) preparing silver nitrate solution and diluted ammonia water solution into silver-ammonia solution; adding prepared silver-ammonia solution to ultrasonically processed graphene oxide solution; stirring at 40-70 degrees C; and preheating for 10-30 minutes; (C) adding glucose into the prepared solution; and reacting for 1-8 hours at 85-100 degrees C to obtain a solution containing reactants; and (D) using deionized water in extracting and filtering the reaction products for multiple times; and vacuum drying the products for 24 hours to obtain graphene-silver nanoparticle composite material.