▎ 摘　　要

NOVELTY - Graphene oxide and melamine are mixed and ground in closed inert gas to be heated for high-temperature heat reduction and nitrogen doping reaction. The product is cooled to room temperature in the inert gas, to obtain nitrogen-doped graphene. USE - Preparation of nitrogen-doped graphene. ADVANTAGE - The method enables simple, economical feasible and convenient preparation of nitrogen-doped graphene, without requiring any catalyst and any particular device requirement. The reaction process can be easily controlled.