▎ 摘　　要

NOVELTY - A graphene-based composite material is obtained by loading noble metal nanoparticles on surface of graphene oxide, and coating the surface of graphene oxide loaded with noble metal nanoparticles by a mesoporous silica material. The content of noble metal nanoparticles is 0.1-10 wt.%. The particle diameter of noble metal nanoparticles and mesoporous silica is 1.4-2 nm and 2.4-3.2 nm, respectively. USE - Graphene-based composite material is used as catalyst (claimed). ADVANTAGE - The graphene-based composite material is prepared with high productivity, under mild reaction condition. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of graphene-based composite material, which involves loading noble metal precursor on the surface of graphene oxide by deposition-precipitation method, to obtain graphene oxide loaded with noble metal precursor, coating the surface of the graphene oxide loaded with the noble metal precursor by mesoporous silica material through sol-gel method in the presence of a surface active agent and a silicon source, to obtain an original composite material, and reducing the original composite material.