▎ 摘　　要

NOVELTY - A graphene with controllable number of layers is prepared by utilizing water/organic solvent mixture as stripping medium, adding sodium hydroxide as intercalator, dispersing with graphite, expanding via microwave rapid heating method, ultrasonic peeling, performing high-speed centrifugal method, obtaining large-size thick graphite sheet, washing with water, and freeze drying. USE - Method for preparing graphene with controllable number of layers. ADVANTAGE - The method has cheap and easy to obtain raw materials, simple, has strong operability. The product has large specific surface area, can be synthesized quickly and in large quantities, and is structurally stable.