▎ 摘　　要

NOVELTY - Preparing graphene involves dissolving graphite powder in mixed solution containing organic solvent and water at a predetermined temperature for oxidizing graphite powder into graphite oxide and then adding the graphite oxide with reducing agent to obtain graphene dispersion. The obtained graphene dispersion is sonicated and then the sonicated material is cleaned by vacuum filtration. The obtained filtrate is dried to obtain graphene. USE - Method for preparing graphene (claimed). ADVANTAGE - The method enables to prepare graphene with short reaction time, and has improved production efficiency.