▎ 摘　　要

NOVELTY - Preparation of graphene comprises preparing 2.0 mg/mL aqueous solution of graphene oxide solution and 0.072 mg/mL food antioxidant solution containing citric acid, mixing, performing reduction reaction at more than 50 degrees C for more than 4 hours, after the reaction, washing product using alkalized ethanol, removing unreacted oxide and food antioxidant, and drying. USE - Preparation method of graphene. ADVANTAGE - The method is green, safe, mild and simple. The obtained graphene has high quality, and is suitable for mass production.