A method for preparing nitrogen-doped graphene by combustion synthesis

Abstract

The invention provides a method for preparing nitrogen-doped graphene with a combustion synthesis method. The method comprises steps as follows: (1) weighed magnesium powder, a solid carbon source and a nitrogen source are evenly mixed, mixed powder is obtained, and the mass ratio of the magnesium powder, the solid carbon source and the nitrogen source in the mixed power is (19.95-99):(40-79.95):(1-39.5); (2) the mixed powder obtained in Step (1) has a combustion synthesis reaction in a specific atmosphere, a reaction product is purified, and the nitrogen-doped graphene is obtained. With the adoption of the method, raw materials are wide in source, the prepared nitrogen-doped graphene is complete in sheet-like structure, good in dispersity in a solvent and large in effective specific surface area, and the nitrogen-doped graphene has the ferromagnetism through nitrogen doping.

Description

technical field

[0001] The invention belongs to the technical field of carbon materials, and relates to a method for preparing nitrogen-doped graphene. Background technique

[0002] Graphene is a new type of carbon material with a single-layer sheet structure composed of carbon atoms. It has excellent physical, chemical and mechanical properties, and is widely used in chemical power sources, optoelectronic devices and heterogeneous catalysis.

[0003] However, since graphene has no energy band gap, its conductivity cannot be fully controlled like traditional semiconductors, and graphene is smooth and inert, which is not conducive to the recombination with other materials, thus hindering the application of graphene. Doping graphene with nitrogen can open the energy band gap and adjust the conductivity type, change the electronic structure of graphene, increase the free carrier density of graphene, and thus regulate the performance of graphene.

[0004] At present, many studi...

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