▎ 摘　　要

NOVELTY - Preparation of graphene comprises dispersing graphite oxide in water under ultrasonic wave oscillation to obtain graphite oxide suspension; adding aluminum and 0.5-2 mol/L acid solution, reacting; and adding sodium citrate, filtering, washing with water and drying. The acid solution is hydrochloric acid solution or sulfuric acid solution. USE - Method for preparing graphene (claimed). ADVANTAGE - The method does not use toxic raw materials, and protects the environment. The graphene has electrical property and high surface area.