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Nitrogen and phosphorus co-doped porous carbon material and preparation method thereof

A porous carbon material and co-doping technology, applied in the field of nanomaterials, can solve the problems of unsuitable industrial applications, cumbersome and complicated process, and unfriendly environment, and achieve the effect of improving hydrophilicity, uniform pore size distribution, and simple method

Inactive Publication Date: 2017-06-23
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although porous carbon with high nitrogen content can be obtained by in-situ nitrogen doping, there are still many problems, such as: the preparation process requires the use of many organic chemical reagents, which are relatively expensive; the template removal process requires the use of hydrofluoric acid Such strong corrosive agents, the process is cumbersome and unfriendly to the environment, not suitable for industrial applications

Method used

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  • Nitrogen and phosphorus co-doped porous carbon material and preparation method thereof
  • Nitrogen and phosphorus co-doped porous carbon material and preparation method thereof
  • Nitrogen and phosphorus co-doped porous carbon material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] A preparation method of nitrogen and phosphorus co-doped porous carbon material, comprising the steps of: first dissolving poly-4-vinylpyridine and potassium phosphate in a 1:1 ratio (mass ratio) in 0.1mol / L dilute hydrochloric acid solution, stirring 4 hours, then vacuum distillation to evaporate the solvent to dryness, under the protection of nitrogen atmosphere, activate at 600°C for 2 hours, after natural cooling, wash in 1mol / L hydrochloric acid solution for 48 hours, then wash with deionized water to neutral pH properties, and dried to obtain nitrogen and phosphorus co-doped porous carbon materials. The specific surface area of ​​nitrogen and phosphorus co-doped porous carbon material is 801m 2 / g, the pore size distribution is uniform, and the nitrogen and phosphorus contents are 8.2% and 7.3% respectively.

[0026] as the picture shows, figure 1 SEM of the nitrogen and phosphorus co-doped porous carbon material obtained in Example 1. figure 2 It is the nitro...

Embodiment 2

[0028] A kind of preparation method of nitrogen, phosphorus co-doped porous carbon material, comprises the following steps: first poly-4-vinylpyridine and potassium phosphate are dissolved in 0.1mol / L dilute hydrochloric acid solution by 1:3 ratio (mass ratio), stir 4 hours, then vacuum distillation to evaporate the solvent to dryness, under the protection of nitrogen atmosphere, activate at 700°C for 2 hours, after natural cooling, wash in 1mol / L hydrochloric acid solution for 48 hours, then wash with deionized water to neutral pH properties, and dried to obtain nitrogen and phosphorus co-doped porous carbon materials. The specific surface area of ​​nitrogen and phosphorus co-doped porous carbon material is 742m 2 / g, the pore size distribution is uniform, and the nitrogen and phosphorus contents are 6.3% and 5.1%, respectively.

Embodiment 3

[0030] A preparation method of nitrogen and phosphorus co-doped porous carbon material, comprising the steps of: first dissolving poly-4-vinylpyridine and potassium phosphate in a 1:5 ratio (mass ratio) in 0.1mol / L dilute hydrochloric acid solution, stirring 4 hours, then vacuum distillation to evaporate the solvent to dryness, under the protection of nitrogen atmosphere, activate at 800°C for 2 hours, after natural cooling, wash in 1mol / L hydrochloric acid solution for 48 hours, then wash with deionized water to neutral pH properties, and dried to obtain nitrogen and phosphorus co-doped porous carbon materials. Nitrogen and phosphorus co-doped porous carbon material has a specific surface area of ​​701m 2 / g, the pore size distribution is uniform, and the nitrogen and phosphorus contents are 4.1% and 3.6%, respectively.

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Abstract

The invention discloses a nitrogen and phosphorus co-doped porous carbon material and a preparation method thereof. The preparation method comprises the following specific steps: first, proportionally dissolving a nitrogenous polymer and phosphate into an acidic solution, stirring, and then performing reduced pressure distillation till a dry state; finally, performing high temperature carbonation on a sample in an inert atmosphere to obtain the high-content nitrogen and phosphorus co-doped porous carbon material. The preparation method is environment-friendly and simple; by the preparation method, large-scale production is facilitated. The nitrogen and phosphorus co-doped porous carbon material prepared by the preparation method provided by the invention is high in nitrogen content and phosphorus content, has a high specific surface area and uniform pore diameter distribution, and has a good application prospect in the fields of carbon dioxide adsorption and electrochemistry.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and relates to a porous carbon and a preparation method thereof, in particular to a nitrogen and phosphorus co-doped porous carbon material and a preparation method thereof. Background technique [0002] Porous carbon materials are widely used in modern science due to their unique properties and abundant and easy-to-obtain synthetic raw materials. Porous carbon materials refer to a class of materials with carbon as the basic skeleton and different pore structures. Porous carbon materials have a series of characteristics such as high chemical stability, acid and alkali resistance, high temperature resistance, electrical conductivity, and thermal conductivity. Such materials usually have developed pores, high specific surface area, high chemical stability, excellent heat resistance, and heat resistance. Acid-base and unique electronic conductivity properties are one of the indispensabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05
CPCC01P2004/03C01P2006/12C01P2006/17C01P2006/80
Inventor 韩生陈静韦焕明王爱民蔺华林刘金宝付宁江新泽兰国贤何忠义熊丽萍
Owner SHANGHAI INST OF TECH
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