▎ 摘　　要

NOVELTY - Preparing graphene comprises carrying out third-order peeling by first-order graphite mechanical stripping and intercalating, second-order solution expansion stripping and third-order ultrasonic peeling, where the method is used to obtain graphene by third-order stripping. USE - The method is useful for preparing graphene. ADVANTAGE - The method: is simple; has mild conditions, and low cost; produces product having thin graphene sheet, less defect and high quality.