▎ 摘　　要

NOVELTY - Preparation of graphene comprises dispersing graphite in solvent containing surfactant, stirring to obtain graphite dispersion where initial concentration of graphite is 1-200 g/L, sending graphite dispersion to the cavitation element at flowrate of 0.5-50000 L/hour, keeping cavitation pressure of 0.1-50 MPa, controlling temperature of water bath to 4-50 degrees C during cavitation process to obtain cavitation dispersion, transporting the primary cavitation dispersion into the cavitation element, repeating the operation for 1-200 times to obtain dispersion, collecting the dispersion, centrifuging at speed of 500-1000 revolutions/minute for 5-120 minutes, taking the supernatant and freeze-drying. USE - Method for preparing graphene. ADVANTAGE - The method is simple and has high stripping efficiency, good product quality, low energy consumption, no environmental pollution and easy scale production.