▎ 摘　　要

NOVELTY - Graphene is prepared by (1) heating expandable graphite under protective gas atmosphere; (2) dissolving in solvent to obtain expandable graphite solution (A); (3) placing the expandable graphite solution (A) in sealed container, heating via microwave; and (4) cooling, centrifuging, depositing and drying the expandable graphite solution to obtain graphene. USE - Method for preparing graphene (claimed). ADVANTAGE - The method is simple and convenient to operate, and can provide graphene with high purity, low cost and high yield, thus making it suitable for large-scale production.