▎ 摘　　要

NOVELTY - A graphene-copper nanoparticles composite material is obtained by polishing glassy carbon electrode or surface-treating dry pure titanium sheet to form three-dimensional structure irregular multilayer of graphene sheet layer in which graphene sheet having different size is overlapped in different direction, raising portion of graphene sheet and compounding copper nanoparticles on the obtained graphene sheet layer. USE - Graphene-copper nanoparticles composite material is used for preparing electrochemical sensor (claimed). ADVANTAGE - The graphene-copper nanoparticles composite material is prepared by simple and environmentally-friendly process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of graphene-copper nanoparticles composite material.