▎ 摘　　要

NOVELTY - Graphene oxide powder, is claimed. The graphene oxide aqueous solution is prepared by the chemical oxidation method after spray drying and uniformly dispersing graphene oxide powder in the form of sheet. USE - The powder is useful in the field of coating (claimed). ADVANTAGE - The powder has simple and easy preparation process; and is economical and environmentally-friendly. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing graphene oxide powder comprising (i) mixing graphene oxide aqueous dispersion with a pH regulator to obtain a mixed solution; and (ii) spray-drying the mixed solution obtained in the above step.