▎ 摘　　要

NOVELTY - Preparing nitrogen-doped graphene using combustion synthesis method comprises (i) weighing magnesium powder, solid carbon source and nitrogen source, mixing evenly to obtain mixed powder, the mass ratio of the magnesium powder, solid carbon source and the nitrogen source is (19.95-99):(40-79.95):(1-39.5), and (ii) taking the mixed powder obtained in Step (i), subjecting to combustion synthesis reaction by passing in specific atmosphere and purifying the reaction product to obtain nitrogen-doped graphene. USE - The method is useful in preparing nitrogen-doped graphene using combustion synthesis method (claimed). ADVANTAGE - The graphene: has sheet structure, good dispersity in solvent, large specific surface area, and ferromagnetism.