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Method for preparing nitrogen-doped hollow mesoporous core-shell carbon spheres

A nitrogen-doped, hollow technology, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the cumbersome process of synthesizing hollow core-shell carbon materials and the inertness of the shell has not been effectively solved. Affecting material properties and other issues, to achieve the effect of low cost, simple operation and uniform pore size distribution

Inactive Publication Date: 2016-06-22
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface of the carbon shell is relatively lack of active sites, and the surface is inert, which affects the performance of the material.
[0004] In summary, there are few reports on the preparation of hollow core-shell carbon nanospheres, and the process of synthesizing hollow core-shell carbon materials is relatively cumbersome, the reaction conditions are harsh, and the problem of shell inertness has not been effectively resolved.

Method used

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  • Method for preparing nitrogen-doped hollow mesoporous core-shell carbon spheres
  • Method for preparing nitrogen-doped hollow mesoporous core-shell carbon spheres
  • Method for preparing nitrogen-doped hollow mesoporous core-shell carbon spheres

Examples

Experimental program
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Embodiment 1

[0019] Step 1: Measure 100ml of deionized water, 40ml of ethanol and 0.2ml of ammonia water, and weigh 2g of cetyltrimethylammonium chloride in a beaker, stir magnetically in an oil bath at 70°C until cetyltrimethylammonium Methylammonium chloride was completely dissolved (15min).

[0020] Step 2: Accurately weigh 0.55g of resorcinol and add it to the beaker, then stir until it is completely dissolved (15min). Accurately weigh 0.74ml of formaldehyde solution with a mass fraction of 37%, and add 3ml of tetraethyl orthosilicate into the beaker at the same time (the solution in the beaker will quickly turn milky white), and stir magnetically in an oil bath at 70°C for 30min.

[0021] Step 3: Accurately weigh 0.3g of melamine and add it to the milky white solution described in the second step, stir in an oil bath at 70°C until it is completely dissolved (about 15 minutes), then add 0.55ml of formaldehyde solution with a mass fraction of 37%, Sealed with a rubber band and stirred ...

Embodiment 2

[0024] Step 1: Measure 100ml of deionized water, 40ml of ethanol and 0.5ml of ammonia water, and weigh 2g of cetyltrimethylammonium chloride in a beaker at the same time, stir magnetically in an oil bath at 70°C until cetyltrimethylammonium Methylammonium chloride was completely dissolved (15min).

[0025] Step 2: Accurately weigh 0.55g of resorcinol and add it to the beaker, then stir until it is completely dissolved (15min). Accurately weigh 0.74ml of formaldehyde solution with a mass fraction of 37%, and add 3ml of tetraethyl orthosilicate into the beaker at the same time (the solution in the beaker will quickly turn milky white), and stir magnetically in an oil bath at 70°C for 30min.

[0026] Step 3: Accurately weigh 0.3g of melamine and add it to the milky white solution described in the second step, stir in an oil bath at 70°C until it is completely dissolved (about 15 minutes), then add 0.55ml of formaldehyde solution with a mass fraction of 37%, Sealed with a rubber ...

Embodiment 3

[0029] Step 1: Measure 100ml of deionized water, 40ml of ethanol and 1ml of ammonia water, and weigh 2g of cetyltrimethylammonium chloride in a beaker, stir magnetically in an oil bath at 70°C until cetyltrimethylammonium Ammonium chloride was completely dissolved (15min).

[0030] Step 2: Accurately weigh 0.55g of resorcinol and add it to the beaker, then stir until it is completely dissolved (15min). Accurately weigh 0.74ml of formaldehyde solution with a mass fraction of 37%, and add 3ml of tetraethyl orthosilicate into the beaker at the same time (the solution in the beaker will quickly turn milky white), and stir magnetically in an oil bath at 70°C for 30min.

[0031] Step 3: Accurately weigh 0.3g of melamine and add it to the milky white solution described in the second step, stir in an oil bath at 70°C until it is completely dissolved (about 15 minutes), then add 0.55ml of formaldehyde solution with a mass fraction of 37%, Sealed with a rubber band and stirred at 70°C ...

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Abstract

The invention discloses a method for preparing nitrogen-doped hollow mesoporous core-shell carbon spheres. Resorcinol-formaldehyde resin serves as a carbon precursor, melamine serves as a nitrogen source, hexadecyl trimethyl ammonium chloride serves as a template agent, tetraethylortho silicate serves as a structural framework, ammonia water serves a catalyst, and the hollow mesoporous core-shell carbon spheres are synthesized through the soft template method. The structure of the carbon spheres can be effectively regulated by controlling the amount of ammonia water, and the prepared nitrogen-doped hollow mesoporous core-shell carbon spheres have obvious hollow core-shell structures and have the advantages of being high in specific surface area, large in pore volume, uniform in pore size distribution and the like.

Description

technical field [0001] The invention relates to a method for preparing a nanocomposite material, in particular to a method for preparing a nitrogen-doped hollow core-shell carbon sphere, and belongs to the field of material preparation. Background technique [0002] In recent years, the appearance of hollow core-shell nanomaterials has become one of the hot spots in the field of nanomaterials. Hollow core-shell nanocarbon materials have the following structural characteristics: the mobile core can provide more exposed active sites, the dense shell can provide a protective layer and make the reaction close to a homogeneous reaction, and the hollow part can be used as the core of the electroactive core. buffer area. Since the structure of the core and the shell can be modified and functionalized, this enables the core-shell structure nano carbon material to achieve the purpose of increasing the percentage of surface atoms to the total atoms, increasing the surface activity, a...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82Y30/00
CPCC01P2004/04C01P2004/34C01P2004/62C01P2006/17
Inventor 李健生林鹏刘超王晶罗瑞李骋王连军孙秀云沈锦优韩卫清刘晓东
Owner NANJING UNIV OF SCI & TECH
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