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A kind of preparation method and application of nitrogen-doped graphene carbon material

A nitrogen-doped graphene, carbon material technology, applied in graphene, chemical instruments and methods, nano-carbon, etc., can solve the limitation of nitrogen-doped three-dimensional graphene application and development, limited amount of nitrogen doping, and large workload and other problems, to achieve the effect of good chemical stability, good morphology and structure, and low equipment requirements

Active Publication Date: 2021-06-18
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The above-mentioned methods all use an intermediate medium, which is a two-step synthesis of nitrogen-doped graphene. The operation is cumbersome, the workload is large, and the amount of nitrogen doping on this three-dimensional graphene is limited, which greatly limits the three-dimensional nitrogen doping. The application and development of graphene, so it is imminent to find a simple new method to synthesize three-dimensional high-nitrogen-doped porous graphene, and it is also a key problem to be solved in the field

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  • A kind of preparation method and application of nitrogen-doped graphene carbon material
  • A kind of preparation method and application of nitrogen-doped graphene carbon material
  • A kind of preparation method and application of nitrogen-doped graphene carbon material

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Embodiment 1

[0044] Embodiment 1: the preparation method of nitrogen-doped graphene carbon material, concrete operations are as follows:

[0045] (1) First divide 250mL of perchloric acid solution with a concentration of 1mol / L into two parts (one part is 200mL and the other part is 50mL), take 10mL of aniline with a density of 1.0217g / mL, according to the transition metal salt and aniline The molar ratio is 1:6. Weigh 4.9378g of ferric chloride hexahydrate and add it to the above 200mL perchloric acid solution and stir until it is completely dissolved, and then feed it for 30minN 2 , to remove dissolved oxygen in the solution to obtain solution A;

[0046] (2) Add 10mL of aniline with a density of 1.0217g / mL to solution A at 23°C, and sonicate for 30min until complete reaction to obtain aniline salt solution;

[0047] (3) Add 10mL of hydrogen peroxide to another 50mL of perchloric acid solution, stir for 5min to make it evenly mixed, and then inject 30minN 2 To remove dissolved oxygen i...

Embodiment 2

[0058] Example 2: The preparation method of the nitrogen-doped graphene carbon material in this example is the same as that in Example 1, except that it is washed three times with deionized water during suction filtration in step (5).

[0059] Figure 7 It is the nitrogen-doped graphene carbon material prepared in embodiment 1 and embodiment 2 in 0.1M saturated KOH solution O 2 Comparison of CV curves under atmosphere, Figure 7 It shows that the area of ​​the CV curve of the precursor after washing with water is not as large as that without washing.

Embodiment 3

[0060] Example 3: The preparation method of the nitrogen-doped graphene carbon material in this example is the same as in Example 1, except that in step (5), it is washed 3 times with absolute ethanol with a mass fraction of 95%.

[0061] Figure 8 It is the nitrogen-doped graphene carbon material prepared in embodiment 1, embodiment 2 and embodiment 3 in 0.1M saturated KOH solution O 2 Comparison of LSV curves in atmosphere, Figure 8 It shows that the washing method of the precursor has a certain influence on the oxygen reduction reaction activity of this nitrogen-doped graphene carbon material, and its activity is unwashed>alcohol washed>water washed.

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Abstract

The invention discloses a preparation method and application of a nitrogen-doped graphene carbon material, and belongs to the technical field of novel carbon materials. The invention adopts a chemical oxidation polymerization method through bottom-up molecular design and simultaneously adds the aniline monomer during the polymerization process. One or several transition metal salts and a strong oxidizing acid containing halogen elements, so that the imine group on the molecular chain is coordinated with the transition metal salt, and the cation of the transition metal element and the anion of the halogen element enter into the aniline at the same time. On the polymer chain, a halogen-modified aniline-metal polymer is obtained, and then an ultra-light nitrogen-doped graphene carbon material with a three-dimensional porous tubular nanostructure is prepared through a segmented heat treatment process. The nitrogen-doped graphene carbon material prepared by the method of the present invention is Heterographene carbon materials are light and can be used as cathode catalysts for hydrogen-oxygen fuel cells or cathode materials for lithium and sodium batteries, or as heavy metal ion adsorbents or as carbon aerogels as thermal insulation materials, and have broad application prospects.

Description

technical field [0001] The invention relates to a preparation method and application of a nitrogen-doped graphene carbon material, belonging to the technical field of new carbon materials. Background technique [0002] Graphene is a sp 2 Carbon single atoms connected by orbital hybridization form a honeycomb two-dimensional atomic crystal structure closely arranged in regular hexagons. Graphene has good physical and chemical properties. In terms of physical properties, it has good electrical conductivity, thermal conductivity, and unique electron transport properties; in terms of chemical properties, graphene has strong hydrophobicity and chemical versatility. High specific surface and high chemical stability; in terms of mechanical properties, graphene is the strongest material found so far, its Young's modulus is about 1.0TPa, and its fracture strength is 200 times higher than the best steel. In terms of optical properties, graphene has high carrier mobility, high transp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184H01M4/96H01M4/583B01J20/20
CPCB01J20/20C01B2204/20C01B2204/32C01P2002/01C01P2002/80C01P2002/82C01P2004/03C01P2006/17H01M4/583H01M4/96Y02E60/10Y02E60/50
Inventor 杨喜昆魏清茂谭丰李卫张宇振孙培川闵春刚
Owner KUNMING UNIV OF SCI & TECH
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