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Porous carbon nanomaterial based on chitosan colloid particles, and preparation method and application thereof

A technology of colloidal particles and nanomaterials, applied in the field of macromolecular self-assembly and electrochemistry, to achieve the effect of easy operation, convenient operation and low price

Pending Publication Date: 2022-02-01
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The morphology, structure and performance of the porous carbon materials prepared by these methods are quite different, and the size is mostly micron.

Method used

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  • Porous carbon nanomaterial based on chitosan colloid particles, and preparation method and application thereof
  • Porous carbon nanomaterial based on chitosan colloid particles, and preparation method and application thereof
  • Porous carbon nanomaterial based on chitosan colloid particles, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A preparation method of porous carbon nanomaterials based on chitosan colloidal particles, comprising the following steps:

[0052] 1) Preparation of γ-polyglutamic acid solution and chitosan solution: put 0.1g γ-polyglutamic acid in a large beaker filled with 100mL ultrapure water, stir at room temperature for 4h until completely dissolved, and obtain γ-polyglutamic acid Glutamic acid solution: Dissolve 0.1 g of chitosan (low viscosity, deacetylation degree ≥ 95%) in 100 mL of glacial acetic acid aqueous solution with a volume concentration of 1% and stir at room temperature for 5 h until completely dissolved to obtain a chitosan solution.

[0053] 2) Preparation of composite colloidal particles of chitosan / γ-polyglutamic acid / nickel ions: at room temperature, take 0.12g of nickel acetate and completely dissolve it in the 100mL chitosan solution prepared in step 1), and mix evenly to obtain the shell For the mixed solution of polysaccharide and nickel acetate, the γ-po...

Embodiment 2

[0065] A preparation method of porous carbon nanomaterials based on chitosan colloidal particles, comprising the following steps:

[0066] 1) Prepare γ-polyglutamic acid solution and chitosan solution: put 0.3g γ-polyglutamic acid in a beaker filled with 200mL ultrapure water, stir at room temperature for 4h until completely dissolved, and obtain γ-polyglutamic acid Acidic acid solution; 0.2g chitosan (low viscosity, deacetylation degree ≥ 95%) was dissolved in 200mL glacial acetic acid aqueous solution with a volume concentration of 1%, and stirred at room temperature for 5h to obtain a chitosan solution.

[0067] 2) Preparation of chitosan-based colloidal particles: Weigh 0.2 g of nickel acetate and pour it into a beaker of 200 mL of chitosan solution, mix evenly to obtain a mixed solution of chitosan and nickel acetate, and use a 100 μL micro-sampler to prepare 200 mL of γ-polyglutamic acid solution was dropped dropwise into the mixed solution of chitosan and nickel acetate...

Embodiment 3

[0072] A preparation method of porous carbon nanomaterials based on chitosan colloidal particles, comprising the following steps:

[0073] 1) Prepare sodium alginate solution and chitosan solution: put 0.2g sodium alginate in a beaker filled with 200mL ultrapure water, and stir at room temperature for 4h until completely dissolved to obtain sodium alginate solution; put 0.2g Chitosan (low viscosity, deacetylation degree ≥ 95%) was dissolved in 400 mL of glacial acetic acid aqueous solution with a volume concentration of 1%, and stirred at room temperature for 5 h until completely dissolved to obtain a chitosan solution.

[0074]2) Preparation of chitosan-based colloidal particles: Weigh 0.16g nickel acetate and pour it into a beaker of 400mL chitosan solution, mix evenly, add 200mL sodium alginate solution dropwise into chitosan with a 100μL micro-sampler In the mixed solution with nickel acetate, the stirring speed of the magnetic stirrer is controlled to be 3000rmp, and the ...

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Abstract

The invention provides a porous carbon nanomaterial based on chitosan colloid particles, and a preparation method and application thereof. The porous carbon nanomaterial is prepared through a macromolecule self-assembly technology and a high-temperature pyrolysis method, polycation electrolyte chitosan and a polyanion cross-linking agent WHICH serve as self-assembly elements are self-assembled under the action of a catalyst in an aqueous solution through weak interaction forces such as static electricity, hydrogen bonds and the like to obtain nano-scale colloidal particles; and the nano-scale colloidal particles are freeze-dried, then are subjected to catalytic pyrolysis through a catalyst in a nitrogen atmosphere, and then undergo hydrochloric acid pickling to obtain the porous carbon nanomaterial. The prepared porous carbon nanomaterial has the characteristics of rich pore channel structure, nanoscale, low price, convenience in operation and the like, and is widely applied to the aspects of catalysis, adsorption, electrochemical energy storage and the like. The material is especially used for preparing an electrode material of a supercapacitor and has excellent performance.

Description

technical field [0001] The invention belongs to the technical field of macromolecular self-assembly and the field of electrochemistry, and specifically relates to a porous carbon nanomaterial based on chitosan colloidal particles and its preparation method and application. Background technique [0002] In the 1980s, after Richard E. Smalley, Robert Curl, and Harold W. Kroto first reported the successful synthesis of fullerenes, carbon materials began to receive widespread attention from more scientists. By 1991, Sumio Iijima of Japan's NEC Corporation published an article in "Nature" and discovered carbon nanotubes, which caused a sensation. Since then, there have been more and more researches on the development and application of carbon materials. Among them, porous carbon micro-nano materials have the characteristics of low density, relative chemical inertness, excellent electronic and thermal conductivity, etc., and are one of the most attractive materials in the 21st ce...

Claims

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Application Information

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IPC IPC(8): C01B32/15H01G11/26H01G11/34H01G11/44
CPCC01B32/15H01G11/26H01G11/34H01G11/44Y02E60/13
Inventor 张荣莉孙静茹刘欢杨晓良翁闽闽华渊崔婉颖霍朝飞过学军陈永贵
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE