▎ 摘　　要

NOVELTY - Preparing graphene comprises (i) dispersing the graphene oxide in the organic solvent under the protection of inert gas, and preparing suspension with mass concentration of 0.1-10 mg/ml, (ii) subjecting the resulting suspension for ultrasonic treatment and heating-stirring treatment to obtain the graphene oxide dispersion liquid, where the ultrasonic power is 100-500 w, ultrasonic time is 5-24 hours, the heating temperature is 20-80 degrees C, heating-stirring time is 8-24 hours, stirring speed is 100-350 revolutions/minute, and (iii) dipping the alkali metal in the graphene oxide dispersion liquid, where the mass ratio of the alkali metal and graphene oxide is 1.05-1.10:1, dipping for 6-10 hours, filtering and drying to obtain the graphene. USE - The method is useful for preparing graphene. ADVANTAGE - The method: has simple operation, mild and controllable reaction condition; and can prepare graphene with good integrity.