▎ 摘　　要

NOVELTY - Micro-nano grade graphene, is claimed. The sheet edge of the graphene is graphene oxide and the other parts of the graphene sheet except the edge position are graphene. USE - Micro-nano grade graphene used in energy storage material, environmental engineering, and sensitive sensing. ADVANTAGE - The micro-nano graphene has high quality and high quality, and is a thin layer low-defect graphene. The method is simple, cost-effective, and suitable for industrial popularization and application. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing micro-nano grade graphene.