▎ 摘　　要

NOVELTY - Preparing graphene metal nanoparticle-composite, comprises preparing graphene by applying a shearing force to a first solution containing a graphite-based material and thus exfoliating the graphite-based material, preparing metal nanoparticles by applying a shearing force to a second solution containing a metal precursor, a capping agent, and a reducing agent, and physically combining the metal nanoparticles on the graphene by applying a shearing force to a third solution containing the graphene and the metal nanoparticles. USE - The method is useful for preparing graphene metal nanoparticle-composite. ADVANTAGE - The method provides: uniform distribution of metal nanoparticles on graphene and combining them in a relatively short time, as compared to conventional methods; and the graphene metal nanoparticles with high quality by performing a reaction in a relatively mild condition i.e. without undergoing oxidation-reduction reactions, hence efficient. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a graphene metal nanoparticle-composite prepared by the method as above per se.