▎ 摘　　要

NOVELTY - Preparing graphene composite material comprises modifying titanium carbonitride with gamma -methacryloxypropyltrimethoxysilane to obtain modified titanium carbonitride, then modifying silicon and boron co-doped graphene with 3-aminopropyltriethoxysilane to obtain modified graphene, mixing and reacting modified titanium carbonitride, modified graphene and modified silica gel to obtain graphene composite material. The modified silica gel is obtained by modifying silica gel with 3-aminopropyltrihydroxysilane. USE - The graphene composite material is useful for removing formaldehyde (claimed). ADVANTAGE - The graphene composite material: can catalyze and oxidize formaldehyde into harmless carbon dioxide and water at room temperature, and realizes the complete removal of formaldehyde in a short time. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for graphene composite material obtained by above method.