▎ 摘　　要

NOVELTY - Preparation of graphene from graphene oxide involves adding magnesium powder to graphene oxide dispersion liquid as a reducing agent, adding the mixture into a para-polyphenol high-pressure reaction kettle, sealing, reacting at a high-pressure constant-temperature at 120-220°C for 5-24 hours, filtering the mixture to obtain a filter cake, washing the filter cake with hydrochloric acid solution, washing with water and drying. USE - Preparation of graphene from graphene oxide used in coatings, composite materials, aerospace and new energy batteries. ADVANTAGE - The method is simple, feasible, low cost, safe and environmentally-friendly, improves the quality and performance of the graphene, and suitable for industrial production.