METHOD FOR PREPARING NITROGEN-DOPED GRAPHENE AND NITROGEN-DOPED GRAPHENE PREPARED THEREBY

摘要

The present invention relates to a method for preparing nitrogen-doped graphene, the method comprising: a first step for preparing a mixed solution containing carbon atoms and nitrogen atoms by putting a carbon compound and an amine compound into an acidic solution, followed by heating, stirring, and thermal decomposition; a second step for forming a compound containing carbon atoms, nitrogen atoms, and Fe²⁺, and then obtaining the compound, the compound being formed by adding an Fe²⁺-containing solution to the mixed solution containing carbon atoms and nitrogen atoms, followed by stirring; a third step for forming an Fe substrate by thermally treating the compound, which is obtained in the second step, under a nitrogen ambience; and a fourth step for forming nitrogen-doped graphene by, after the third step, diffusing the carbon atoms and the nitrogen atoms, which are contained in the compound, into the Fe substrate through cooling. More preferably, the method further comprises a fifth step for removing, after the fourth step, the Fe substrate by adding an acid to cause a reaction.