▎ 摘　　要

NOVELTY - Preparing hydroxyl functional graphene comprises adding graphite powder and potassium hydroxide solid to a ball milling tank, rolling in the ball milling tank, placing the ball milling tank in a ball mill; continuously ball milling for 10-16 hours at 200-400 revolutions/minute under the air blasting and normal temperature condition; using deionized water for transferring the ball milling product to a sample bottle, and using deionized water for removing the unreacted potassium hydroxide until the solution is neutral. USE - Method for preparing hydroxyl functional graphene (claimed). ADVANTAGE - The method can obtain hydroxyl graphene under normal temperature. The inner structure of the graphene is kept good, and has high crystallization degree.