▎ 摘　　要

NOVELTY - Preparation of graphene oxide in alkaline aqueous phase involves dispersing graphite in aqueous alkaline solution, adding oxidant to the aqueous alkaline solution, ultrasonically reacting at certain pressure, obtaining graphene oxide solution, post-treating the obtained solution, dispersing in water and obtaining graphene oxide dispersion solution. USE - Preparation of graphene oxide in alkaline aqueous phase (claimed). ADVANTAGE - The method enables simple, safe, controllable and environmentally-friendly preparation of graphene oxide having excellent dispersibility in water, and high quality, in alkaline aqueous phase by avoiding use of concentrated sulfuric acid.