Porous phosphor-nitrogen-codoped carbon material and preparation method thereof

A porous carbon material and carbon material technology, applied in the field of carbon materials, can solve problems such as low specific surface area and performance impact

Inactive Publication Date: 2014-08-27
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the specific surface area of ​​the currently prepared phosphorus-nitrogen co-doped carbon materials is low, which affects their performance in many fields such as catalysis and electrochemistry. Therefore, it is very meaningful to develop new types of phosphorus and nitrogen materials with high specific surface areas. of

Method used

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  • Porous phosphor-nitrogen-codoped carbon material and preparation method thereof
  • Porous phosphor-nitrogen-codoped carbon material and preparation method thereof
  • Porous phosphor-nitrogen-codoped carbon material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A. Dissolve 0.20g of triphenylphosphine in 2ml of aniline, stir to dissolve evenly, add to 10mL of 2mol / L hydrochloric acid solvent, stir and mix evenly, then add 5g of silicon dioxide nanosphere silicon-based hard template in turn (Ludox-HS40, purchased by Sigma-Aldrich Company), 0.02g iron nitrate (III) nonahydrate, 0.005g cobalt nitrate (II) hexahydrate, stir well, add 20mL1mol / L ammonium persulfate aqueous solution, at 0 Polymerization was stirred at °C for 24 h to obtain polymer 1.

[0037] B. After polymer 1 is cooled to 25°C, it is transferred to a polytetrafluoroethylene hydrothermal reaction kettle, and reacted at 180°C for 24 hours. After the reaction, it is naturally cooled to 25°C, and the hydrothermal substance is taken out, and dried in a water bath at 80°C. The solid 1 was obtained, and the temperature of the solid 1 was raised to 600° C. at a rate of 10° C. / min under nitrogen protection, and calcined for 1 h. The temperature was lowered to 25°C and take...

Embodiment 2

[0041] A. The quality of triphenylphosphorus is changed to 0.1g, and other processing conditions are the same as in Example 1.

[0042] B. The hydrothermal reaction time is changed to 12h, and other processing conditions are the same as in Example 1.

[0043] C. Same as Example 1 to obtain a porous nitrogen-phosphorus co-doped carbon material.

[0044] The specific surface area of ​​the porous nitrogen-phosphorus co-doped carbon material obtained by nitrogen adsorption and desorption analysis and scanning electron microscopy is 197.7m 2 g -1 , the pore size is mainly 12.7nm pores; the scanning electron microscope energy spectrum shows that the atomic percentages in the porous nitrogen-phosphorus co-doped carbon material are 85.0% carbon, 2.8% oxygen, 4.26% nitrogen, and 0.1% phosphorus.

Embodiment 3

[0046] A. The mass of triphenylphosphine was changed to 0.4g, the silicon-based hard template of silica nanospheres was changed to Ludox-TM40, which was purchased from Sigma-Aldrich, and other processing conditions were the same as in Example 1.

[0047] B. The hydrothermal reaction time was changed to 12 hours, the calcination temperature was changed to 800° C., and only the heating treatment was performed, that is, the holding time was 0 hours, and the other treatment conditions were the same as in Example 1.

[0048] C. Same as Example 1 to obtain a porous nitrogen-phosphorus co-doped carbon material.

[0049] The specific surface area of ​​the porous nitrogen-phosphorus co-doped carbon material obtained by nitrogen adsorption and desorption analysis and scanning electron microscope detection is 142m 2 g -1 , the pore size is mainly 23nm pores; the scanning electron microscope energy spectrum shows that the atomic percentages in the porous nitrogen-phosphorus co-doped carb...

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Abstract

The invention discloses a porous phosphor-nitrogen-codoped carbon material and a preparation method thereof, and belongs to the field of carbon materials. Through a chemical bonding method, phosphor atoms and nitrogen atoms are introduced into a porous carbon material so that the carbon atoms in a six-membered carbon ring of the porous carbon material are replaced by the phosphor atoms and nitrogen atoms and the functional porous carbon material is obtained. The preparation method comprises the following steps of A, preparing a polymer from a nitrogen-containing conducting polymer, a phosphorus-containing organic matter, a silicon-based hard template and a metal catalyst, B, carrying out a hydrothermal reaction process to obtain a solid 1 and calcining the solid 1 to obtain a solid 2, and C, etching the solid 2 and carrying out cleaning to obtain the porous phosphor-nitrogen-codoped carbon material. The porous phosphor-nitrogen-codoped carbon material has high nitrogen and phosphor content, a high specific surface area and a high yield. The preparation method has simple processes and can be operated easily.

Description

technical field [0001] The invention relates to a porous phosphorus-nitrogen co-doped carbon material and a preparation method thereof, belonging to the field of carbon materials. Background technique [0002] Nitrogen-doped carbon materials, as a new type of carbon materials, have attracted increasing attention. The research results show that nitrogen doping can increase the electron cloud density of carbon materials at the Fermi level, and the work function of carbon materials also increases with the amount of nitrogen doping, thereby enhancing the conductivity of carbon materials. Density functional calculations show that the pyridinic nitrogen in single-walled carbon nanotubes is helpful to enhance the lithium storage capacity of carbon materials due to its large absorption energy and low energy barrier. Studies have shown that pyridine-type and graphite-type nitrogen-doped structures are conducive to the intercalation of lithium ions in carbon materials. Phosphorus be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C01B32/05
Inventor 杨文张小玲田亚芬倪梅张俏
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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