▎ 摘　　要

NOVELTY - Preparation of graphene comprises mixing expanded graphite with organic solvent, ultrasonically oscillating to obtain the graphene microchip suspension, and extracting graphene microsheet. USE - Method for preparation of graphene (claimed). ADVANTAGE - The method is environment-friendly and suitable for low-cost mass production of industrial graphene material, does not uses any redox process to prevent destroying graphene lattice structure with high quality, and has reusable organic solvent and no any acid or other toxic discharge wastes.