▎ 摘　　要

NOVELTY - Grading and separating graphene material comprises preparing a liquid dispersion of graphene material including graphene, graphene oxide or graphene quantum dots, subjecting the liquid dispersion to electrophoresis at a voltage gradient of 8-30 V/cm for 2-4 hours, taking a sample at an electrode side every 15 minutes to obtain liquid dispersion of graphene material of different dimensions. USE - The method is useful for grading and separating graphene material (claimed). ADVANTAGE - The method: can separate graphene materials of different dimensions, to obtain graphene materials with different properties.