▎ 摘　　要

NOVELTY - A graphene colloidal dispersion is prepared by adding graphite into oxidant and water, dispersing graphene oxide, and obtaining dispersion I; dispersing dispersion I into N,N-dimethylformamide through solution exchange method to obtain dispersion II; and dispersing graphene in N,N-dimethylformamide via solvothermal reaction and placing dispersion 2 into closed container. USE - Method for preparation of graphene colloidal dispersion (claimed). ADVANTAGE - The method is suitable for mass production along with simple process, high controllability and good repeatability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the graphene colloidal dispersion ( less than or equal to 0.5 mg/mL) prepared by above method.