▎ 摘　　要

NOVELTY - The preparation of graphene, involves (1) mixing graphite, oxidant and strong acid at mass ratio of (0.5-3) g:(0.5-3) g:(20-120) ml in water bath at 0-15 degrees C for 0.5-3 hours to obtain mixed solution (A), dripping the mixed solution (A) into deionized water, mixing the mixed solution (A) and hydrogen peroxide at volume ratio of 5:1 and stirring for 5-20 minutes at 15 degrees C for 1-24 hours to obtain intercalated graphite solution, (2) washing the intercalated graphite solution three times with deionized water and dilute hydrochloric acid alternately, and washing the solution to neutrality using deionized water, adding the solution to alkali solution, mixing and ultrasonically reacting for 0.5-3 hours. USE - Preparation of graphene. ADVANTAGE - The method enables preparation of graphene by simple, safe and economical process.