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A method for preparing nitrogen-doped graphene by combustion synthesis

A nitrogen-doped graphene, combustion synthesis technology, applied in the field of carbon materials, can solve the problems of low nitrogen content and high equipment requirements, and achieve the effect of complete sheet structure, large effective specific surface area and good reproducibility

Active Publication Date: 2017-05-31
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of high equipment requirements and low nitrogen content in the existing graphene preparation, the present invention aims to provide a method for preparing nitrogen-doped graphene by applying the combustion synthesis method, and doping nitrogen into the graphene sheet Inside, nitrogen-doped graphene was prepared

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  • A method for preparing nitrogen-doped graphene by combustion synthesis
  • A method for preparing nitrogen-doped graphene by combustion synthesis
  • A method for preparing nitrogen-doped graphene by combustion synthesis

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specific Embodiment approach 1

[0042] Specific implementation mode one: this implementation mode is realized through the following steps:

[0043] (1) Weigh 26.7% of magnesium powder, 60% of calcium carbonate and 13.3% of urea by mass percentage; wherein, the purity of the magnesium powder is 99.5%, and the average particle diameter is 0.1mm; the purity of calcium carbonate is 99% %, the average particle diameter is 0.044mm, and the purity of urea is 99%;

[0044] (2) Evenly mix the magnesium powder, calcium carbonate and urea powder weighed in step (1) to obtain a mixed powder;

[0045] (3) Put the mixed powder obtained in step (2) into a 1L crucible, and add the igniter Fe above the mixed powder 3 o 4 +Mg;

[0046] (4) Then put the crucible into a 20L combustion synthesis reaction device;

[0047] (5) Introduce carbon dioxide into the combustion synthesis reaction device to fill the crucible and the combustion synthesis reaction device with carbon dioxide;

[0048] (6) By means of partial electrotherma...

specific Embodiment approach 2

[0051] Specific implementation mode two: this implementation mode is realized through the following steps:

[0052] (1) Weigh 25.1% magnesium powder, 67.3% magnesium carbonate powder and 7.6% ammonium chloride by mass percentage; wherein, the purity of the magnesium powder is 99.5%, and the average particle diameter is 0.1mm; the calcium carbonate The purity is 99%, the average particle diameter is 0.044mm, and the purity of ammonium chloride is 99%;

[0053] (2) Evenly mix the magnesium powder, calcium carbonate and ammonium chloride powder weighed in step (1) to obtain a mixed powder;

[0054] (3) Put the mixed powder obtained in step (2) into a 1L crucible, and add the igniter Fe above the mixed powder 3 o 4 + Al;

[0055] (4) Then put the crucible into a 20L combustion synthesis reaction device;

[0056] (5) Introduce carbon dioxide into the combustion synthesis reaction device to fill the crucible and the combustion synthesis reaction device with carbon dioxide;

[0...

specific Embodiment approach 3

[0060] Specific implementation mode three: this implementation mode is realized through the following steps:

[0061] (1) Weigh 27.6% of magnesium powder, 36.2% of calcium carbonate, 22.3% of magnesium carbonate, 6.8% of ammonium carbonate and 7.1% of ammonium sulfite by mass percentage; wherein, the purity of the magnesium powder is 99.5% , the average particle diameter is 0.1mm; the purity of calcium carbonate is 99%, the average particle diameter is 0.044mm, the purity of ammonium carbonate is 99%, and the purity of ammonium sulfite is 99%;

[0062] (2) Evenly mix the magnesium powder, calcium carbonate, magnesium carbonate, ammonium carbonate and ammonium sulfite powder weighed in step (1) to obtain a mixed powder;

[0063] (3) Put the mixed powder obtained in step (2) into a 1L crucible, and add the igniter Fe above the mixed powder 3 o 4 +Mg;

[0064] (4) Then put the crucible into a 20L combustion synthesis reaction device;

[0065] (5) Introduce carbon dioxide into...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184
Inventor 王黎东费维栋苗卿华刘兆远
Owner HARBIN INST OF TECH
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