▎ 摘　　要

NOVELTY - A graphene-loaded metal nanocomposite material comprises metal nanoparticles uniformly dispersed in graphene. The particle diameter of metal nanoparticles is 1-100 nm. The amount of metal nanoparticles is 1-10 %mass. USE - Graphene-loaded metal nanocomposite material is used for oxidation reaction of benzyl group (claimed). ADVANTAGE - The environmentally-friendly and efficient graphene-loaded metal nanocomposite material has size of 10-100 nm and excellent catalytic activity, and is prepared by efficient, economical and simple process with reduced energy consumption. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of graphene-loaded metal nanocomposite material, which involves adding graphene oxide to pure water, dispersing, preparing aqueous solution of graphene oxide with concentration of 0.1-5 mg/mL, adding metal salt to the obtained solution, stirring at 20-40 degrees C for 12-36 hours, obtaining mixed solution, adding 0.01-0.1 mol/L surfactant, stirring for 12-36 hours to prevent reunion of metal ion, adding 0.5-5 mol/L alkali, dripping hydrazine hydrate at dripping speed of 0.02-1 mL/second at 60-120 degrees C in 12-24 hours, filtering, and drying. The amount of metal salt based on amount of graphene oxide is 1-10 %mass; and (2) usage method of graphene-loaded metal nanocomposite material for oxidation reaction of benzyl group, which involves reacting aromatic benzyl compound with concentration of 1-5 mol/L, 150-400 mg graphene-loaded metal nanocomposite material as catalyst, and 10-500 mL solvent at 80-120 degrees C for 12-36 hours, obtaining a conversion rate of 5-50% and aromatic benzyl alcohol selectivity of 80-100%.