▎ 摘　　要

NOVELTY - Preparation of nanocomposite material based on autocatalysis of graphene oxide comprises slowly adding 0.1-0.01 M metal salt solution into greater than or equal to 0.5 mg/ml graphene oxide solution; taking a carboxy group and hydroxy group on the graphene oxide as nucleating sites of nano-grain crystal, where volume ratio of metal salt solution to graphene oxide solution is 0.1:1-1:1; via autocatalytic method, growing crystals on the nucleating sites on the graphene oxide sheet for forming a graphene sheet adhered with a layer of metal nano-grains; and subjecting graphene sheet to ultrafiltration or dialysis. USE - Preparation of graphene nanocomposite material (claimed) for use e.g. in electron devices, energy storage, drug loading, and biological detection. ADVANTAGE - The method is simple, easy to control, environmentally friendly, and suitable for large-scale operation; and has low cost. The graphene nanocomposite material has high specific surface area and good electrical conductivity.