▎ 摘　　要

NOVELTY - Preparing graphene, comprises (a) mixing a predetermined ratio of water and acetone to obtain a liquid phase, (b) dispersing the obtained liquid phase in graphite powder to obtain a graphite dispersion liquid, (c) adopting ultrasonic cavitation or jet cavitation process on the dispersion liquid and taking the upper solution after standing treatment, and (d) processing high-speed centrifugation on the solution to obtain a stable graphene dispersion liquid. USE - The method is useful for preparing graphene. ADVANTAGE - The method simple and easy to operate, and provides graphene with high yield in an environment-friendly manner. DESCRIPTION OF DRAWING(S) - The figure shows a flow diagram of a method for preparing graphene.