▎ 摘　　要

NOVELTY - The method involves: oxidizing by Hummers method graphite powder using concentrated sulfuric acid and potassium permanganate at 10-30 degrees C, carrying out low-power ultrasonic-assisted stripping reaction using a power of 80-300W, adding hydrogen peroxide solution to oxidized graphite mixed solution until product becomes bright yellow color, washing obtained product with 1 mole/l hydrochloric acid solution 3 times, washing with deionized water until neutral, and finally dialyzing resulting product to give graphene oxide solution. USE - The method is used for synthesizing graphene oxide at normal temperature (claimed). ADVANTAGE - The method enables simple, rapid and economical synthesis of graphene oxide at normal temperature.