▎ 摘　　要

NOVELTY - Separating graphene comprises (i) placing the graphite alkene material into liquid, subjecting initially graphene to Brownian motion in the liquid, forming upper graphene, middle graphene and underlying graphene; and (ii) taking the upper layer of graphene from the liquid through a sieve or upper graphene and middle graphene, and drying the extracted graphene. USE - The method is useful for separating graphene.