▎ 摘　　要

NOVELTY - Preparing graphene by liquid phase exfoliation, comprises dissolving polyvinylpyrrolidone in anhydrous alcohol to obtain an alcohol mixture of 0.1 mg/l, mixing the flake graphite powder and concentrated aqueous ammonia (25-28%) or ammonium bicarbonate according to the ratio of weight ratio 3-5:1 to obtain the mixture of graphite powder, mixing the mixture of graphite powder and alcohol mixture according to the weight ratio of 0.5-1.5% in a closed container, carrying out ultrasonic dispersion treatment for more than 20 hours, allowing to stand for more than 20 hours, and taking the upper layer mixed solution to obtain liquid-phase graphene. USE - The method is useful for preparing graphene by liquid phase exfoliation. ADVANTAGE - The method is simple and easy to obtain, cost-effective, and environmentally-friendly, and provides liquid-phase peeling preparation graphite with high stability.