▎ 摘　　要

NOVELTY - Preparing metal-graphene nanocomposite material comprises e.g. loading metal on graphene, dissolving metal soluble compounds in water, adding graphene oxide, carrying out dispersion using water, adding organic fuel to obtained dispersion, uniformly mixing with ammonium nitrate, carrying out ultrasonic treatment with stirring for 15-90 minutes, to obtain uniform dispersion, concentrating obtained dispersion by heating to thick paste, heating at 300-900 degrees C in a heating furnace, cooling to room temperature, washing and drying, to obtain the final product, the metal is gold or platinum. USE - The method is useful for preparing metal-graphene nanocomposite material (claimed). ADVANTAGE - The method has short preparation time, simple preparation process; has no toxic and harmful reducing agent or stabilizer, uniform grain size; and is suitable for industrial preparation. DETAILED DESCRIPTION - Preparing metal-graphene nanocomposite material comprises (i) loading metal on graphene, to obtain target product, dissolving metal soluble compounds in water, adding 0.5-5 g/l graphene oxide, carrying out dispersion using water; (ii) adding organic fuel to step (i) obtained dispersion, uniformly mixing with ammonium nitrate, carrying out ultrasonic treatment with stirring for 15-90 minutes, to obtain uniform dispersion; (iii) concentrating the step (ii) obtained dispersion by heating to thick paste, heating at 300-900 degrees C in a heating furnace, cooling to room temperature, washing and drying, to obtain the final product, where the step (i) the amount of metal loaded on graphene is 10-50 wt.%, in the step (i) the metal is gold or platinum. In the step (i) the metal-soluble compound is platinum-soluble compound, lithium tetrachloroformate, sodium tetrachloroformate, potassium tetrachloroformate, ammonium tetrachloroformate, sodium hexachlorobutyrate, potassium hexachlorobutyrate, hexachloroplatinic acid or platinum tetrachloride, the gold soluble compound is sodium chloroaurate, potassium chlorohydrate, ammonium chloride, chloroauric acid, or gold trichloride, in the step (ii) the number of moles of ammonium nitrate is 2-8 times the number of moles of metal soluble compound, in the step (ii) organic fuel is glycine, urea or ethylene glycol, the number of moles of organic fuel added is 0.5-5 times moles of ammonium nitrate, In step (iii) the washing process is carried out using deionized water and ethanol, and the washing solution is having conductivity of 10 mu second/cm2.