▎ 摘　　要

NOVELTY - A graphene oxide comprises a compound (a), a compound (b), a bonding (a1) between compound (a), and bonding (b1) between compound (b). The compound (a) and compound (b) contain a hydroxy group. USE - Graphene oxide is used for forming thin film used as separation film and nanocomposite material for electronic component for sensor lamp and biosensor. ADVANTAGE - The graphene oxide has excellent physical property, oxygen functionality, and practicality, and is manufactured by economical and environmentally-friendly process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of graphene oxide, which involves mixing compound (a) and compound (b), performing polymerization reaction, and forming graphene oxide.