▎ 摘　　要

NOVELTY - Preparation of graphene comprises fully cooling PTFE-lined kettle, graphite having 60 meshes, potassium permanganate, and concentrated sulfuric acid to 2 degrees C in a refrigerator; dispersing graphite oxide in deionized water in a three-neck flask, and adding ammonia water under the ultrasonic wave and strong mechanical stirring, where the mass volume ratio of the graphite oxide and water is 1:5 (g:mL); after 1 hour, adding hydrazine hydrate, where the mass volume ratio of the graphite oxide to hydrazine hydrate is 1:2 (g:mL); carrying out ultrasonic treatment and strong stirring for 2 hours, oil bath heating to 98-100 degrees C, and reducing for 24 hours; and washing the resulting black product with deionized water, and suction filtering until the pH value is 7. USE - The method is used for preparing graphene. ADVANTAGE - The method has a simple operation, and can easily control the temperature.