▎ 摘　　要

NOVELTY - Graphene oxide has ketene structure. USE - Graphene oxide used in organic synthesis field. ADVANTAGE - The graphene oxide is easy to process in a simple, safe, energy-saving, eco-friendly and cost-effective manner. It does not use toxic and harmful organic material, and suitable for application in industry. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene oxide which involves: (A) taking the graphite anode, graphite cathode or platinum electrode and 0.5 molar sodium chloride aqueous solution as electrolyte and electrolyzing to obtain electrolyte, where the distance between anode and cathode is 2.5-3.5 cm, voltage is 3-4 Volt, the current is 0.02-0.06 Ampere and the electrolysis time is 60-1440 minutes; and (B) separating the electrolytic solution and drying the product to obtain the graphene oxide.