▎ 摘　　要

NOVELTY - Preparing graphene involves expanding expandable graphite and then pulverizing to obtain expanded graphite powder, mixing expanded graphite powder with hydrogen peroxide, degassing, then ultrasonic stripping, heating to decompose hydrogen peroxide, and then drying to obtain graphene. USE - Method for preparing graphene. ADVANTAGE - The method enables to prepare graphene that is safe, environment-friendly, has uniform size, and less defects.