▎ 摘　　要

NOVELTY - Preparation of graphene oxide comprises mixing graphite, intercalation agent and auxiliary intercalation agent, and reacting to obtain reaction mixture; cooling reaction mixture, reacting with oxidant, adding water, and heating to react to obtain intermediate system; and reacting with reducing agent. The mass ratio of graphite and oxidant is 1:1.5-2. The mole ratio of carbon element and oxygen element is 1.6-2:1. USE - Method for preparing graphene oxide (claimed). ADVANTAGE - The graphene oxide has high hardness and complete structure. The method is simple and easy. It improves conductivity of graphene.