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Method used for preparing mesoporous carbon taking chitosan oligosaccharide as carbon nitrogen source

A technology of chitosan oligosaccharide and mesoporous carbon, which is applied in the field of preparation of mesoporous carbon, can solve the problems of messy and wide distribution of mesoporous carbon pore size, and achieve the effects of environmental friendliness, narrow pore size distribution and good performance

Active Publication Date: 2019-08-09
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when chitosan is used as the carbon and nitrogen source, the pore size distribution of the prepared mesoporous carbon is very chaotic and wide. Therefore, further research is needed on the choice of carbon source and the improvement of the process.

Method used

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  • Method used for preparing mesoporous carbon taking chitosan oligosaccharide as carbon nitrogen source
  • Method used for preparing mesoporous carbon taking chitosan oligosaccharide as carbon nitrogen source
  • Method used for preparing mesoporous carbon taking chitosan oligosaccharide as carbon nitrogen source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: a kind of method for preparing mesoporous carbon with chitosan oligosaccharide as carbon and nitrogen source, the steps are as follows:

[0035] 1) Take polymer nonionic surfactant F127 and put it into water at a mass concentration of 2.2%, and stir in an oil bath at 70°C for 1 hour to obtain solution A;

[0036] 2) Take chitosan oligosaccharide and put it into water at a mass concentration of 6.7%, stir in an oil bath at 70°C for 1 hour, add glyoxal during the stirring process, the mass ratio of glyoxal to water is 2:15, and obtain solution B;

[0037] 3) Add solution B to solution A to obtain solution C, and continue to stir solution C in an oil bath at 70° C. for 2 hours to obtain solution D;

[0038] 4) Add 1.5 times the amount of water to solution D for dilution, and continue to stir and react the diluted solution at 70°C for 16 hours to obtain solution E;

[0039] 5) After the solution E was cooled to room temperature, it was transferred into a hydr...

Embodiment 2

[0042] Embodiment 2: a kind of method that uses chitosan oligosaccharide as carbon and nitrogen source to prepare mesoporous carbon, the steps are as follows:

[0043] 1) Take polymer nonionic surfactant F127 and put it into water at a mass concentration of 2%, and stir in an oil bath at 60°C for 1.5 hours to obtain solution A;

[0044] 2) Take chitosan oligosaccharide and put it into water at a concentration of 5%, stir the oil bath at 60°C for 1.5h, add glyoxal during the stirring process, the mass ratio of glyoxal to water is 1:15, and obtain solution B;

[0045] 3) Add solution B to solution A to obtain solution C, and continue to stir solution C in an oil bath at 60°C for 12.5 hours to obtain solution D;

[0046] 4) Add 1 times the amount of water to solution D for dilution, and continue to stir and react the diluted solution at 60°C for 20 hours to obtain solution E;

[0047] 5) After cooling solution E to room temperature, transfer it into a hydrothermal reaction kettl...

Embodiment 3

[0050] Embodiment 3: a kind of method that uses chitosan oligosaccharide as carbon and nitrogen source to prepare mesoporous carbon, the steps are as follows:

[0051]1) Take polymer nonionic surfactant F127 and put it into water at a mass concentration of 3%, and stir in an oil bath at 80°C for 0.5h to obtain solution A;

[0052] 2) Take chitosan oligosaccharide and put it into water at a concentration of 8%, stir the oil bath at 80°C for 0.5h, add glyoxal during the stirring process, the mass ratio of glyoxal to water is 1:5, and obtain solution B;

[0053] 3) Add solution B to solution A to obtain solution C, and continue stirring solution C in an oil bath at 80° C. for 1.5 h to obtain solution D;

[0054] 4) Add 2 times the amount of water to solution D for dilution, and continue to stir and react the diluted solution at 80°C for 10 hours to obtain solution E;

[0055] 5) After cooling solution E to room temperature, transfer it into a hydrothermal reaction kettle, and co...

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Abstract

The invention discloses a method used for preparing mesoporous carbon taking chitosan oligosaccharide as a carbon nitrogen source. The method comprises following steps: 1, F127 is prepared, and is added into water, stirring oil bath treatment is carried out for 0.5 to 1.5h at 40 to 80 DEG C so as to obtain a solution A; 2, chitosan oligosaccharide is added into water, and stirring oil bath treatment is carried out for 0.5 to 1.5h at 40 to 80 DEG C so as to obtain a solution B, wherein, in the stirring process, glyoxal is added; 3, the solution B is added into the solution A so as to obtain a solution C, the solution C is subjected to stirring oil bath treatment for 1.5 to 2.5h at 40 to 80 DEG C so as to obtain a solution D; 4, 1 to 2 times of water is added into the solution D for dilution, an obtained diluted solution is subjected to stirring reaction for 4 to 20h at 40 to 80 DEG C so as to obtain a solution E; 5, the solution E is cooled to room temperature, is introduced into a hydro-thermal reaction vessel, and is subjected to hydro-thermal reaction for 20 to 72h at 130 to 150 DEG C so as to obtain a reaction solution F; 6, the reaction solution F is subjected to washing, dispersion, and drying so as to obtain a product G; and 7, the product G is introduced into a combustion boat for roasting at nitrogen atmosphere at 410 to 900 DEG C so as to obtain mesoporous carbon. Thepreparation method is friendly to the environment; no harmful residue is left; in-situ doping of N is realized; pore diameter distribution range is narrow; and the performance is excellent.

Description

technical field [0001] The invention relates to a method for preparing mesoporous carbon, in particular to a method for preparing mesoporous carbon by using chitosan as a carbon and nitrogen source. Background technique [0002] Mesoporous carbon materials, especially mesoporous carbon materials with large pore diameter and high specific surface area, because of their unique properties such as high specific surface area, large pore volume, high mechanical stability and chemical inertness, make them suitable for biological applications. Molecular separation and biocatalysis, adsorption separation, drug carriers, electrode materials and other fields have broad application prospects. [0003] At present, the preparation of mesoporous carbon materials is mainly through the soft template method, using phenolic resin synthesized from phenol and formaldehyde as carbon source, commercially available or self-made amphiphilic tri-block copolymers (F127, P123, PEO-b -PS, etc.) as soft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05
CPCC01B32/05Y02E60/13
Inventor 潘红艳林倩曹建新王梦许值铭贾双珠田洪松廖雯琪
Owner GUIZHOU UNIV
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