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Preparation method of nanometer porous carbon material

A nanoporous carbon and sodium bicarbonate technology, applied in the field of electrochemistry, can solve the problems of carbon particle microsphere micropore and small mesopore collapse, cumbersome process, and long time consumption, so as to improve hydrophilicity and hydrophobicity, and change hydrophilicity , to reduce the effect of collapse

Inactive Publication Date: 2018-10-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent CN102874791A discloses a preparation method of a hierarchical porous nano-carbon material, the method comprising the following steps: (1) preparing an organosol; (2) aging the organosol prepared in step (1) to prepare an organic aerogel; ( 3) drying the organic airgel obtained in step (2) under constant temperature in vacuum; (4) carbonizing the product obtained in step (3) once; (5) ball milling the product obtained in step (4); (6) (5) Soak the obtained product in the mixed acid solution, then wash until the pH value is 6-7, filter, vacuum and dry at constant temperature; (7) add KOH solid and deionized water to the product obtained in step (6) and mix it into a paste , vacuum constant temperature drying; (8) Carry out secondary carbonization to the product obtained in step (7), but the KOH activation process is cumbersome and time-consuming, and there will be localized corrosion, which will cause the micropores and small mesopores on the carbon particle microspheres to occur certain collapse

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Embodiment 1

[0029] A method for preparing a nanoporous carbon material, comprising the steps of:

[0030] Step 1. Configure an aqueous solution containing a template agent (sodium dodecylbenzenesulfonate), and stir evenly until the template agent is completely dissolved, and the solution becomes clear with a concentration of 25.00×10 -3 mol / L;

[0031] Step 2: Add a certain amount of medicines phloroglucinol and melamine into the aqueous solution containing the templating agent, add formaldehyde after completely dissolving, then add the catalyst sodium bicarbonate solution, stir evenly, and form a sol, wherein the solute mass fraction is 20% , the molar ratio of phloroglucinol, melamine and formaldehyde is 4:1:10, the concentration of sodium bicarbonate solution is 0.05mol / L, and the molar ratio of phloroglucinol and sodium bicarbonate is 100;

[0032] Step 3, seal the sol and place it in an oven at 85°C, treat it for 5 days, cool to room temperature after gelation, take out the sample, ...

Embodiment 2

[0037] A method for preparing a nanoporous carbon material, comprising the steps of:

[0038] Step 1. At 35°C, configure an aqueous solution containing a template agent (hexadecyltrimethylammonium bromide), and stir evenly until the template agent is completely dissolved, and the solution becomes clear with a concentration of 25.00×10 -3 mol / L.

[0039] Step 2: Add a certain amount of medicines phloroglucinol and melamine into the aqueous solution containing the templating agent, add formaldehyde after completely dissolving, then add the catalyst sodium bicarbonate solution, stir evenly, and form a sol, wherein the solute mass fraction is 20% , the molar ratio of phloroglucinol, melamine and formaldehyde is 3:2:10, the concentration of sodium bicarbonate solution is 0.05mol / L, and the molar ratio of phloroglucinol and sodium bicarbonate is 50;

[0040] Step 3, seal the sol and place it in an oven at 85°C, treat it for 5 days, cool to room temperature after gelation, take out ...

Embodiment 3

[0045] A method for preparing a nanoporous carbon material, comprising the steps of:

[0046] Step 1. At 35°C, configure an aqueous solution containing a template agent (sodium dodecylbenzenesulfonate), and stir evenly until the template agent is completely dissolved, and the solution becomes clear with a concentration of 15.00×10 -3 mol / L.

[0047] Step 2: Add a certain amount of medicines phloroglucinol and melamine into the aqueous solution containing the templating agent, add formaldehyde after completely dissolving, then add the catalyst sodium bicarbonate solution, stir evenly, and form a sol, wherein the solute mass fraction is 10% , the molar ratio of phloroglucinol, melamine and formaldehyde is 3:2:10, the concentration of sodium bicarbonate solution is 0.05mol / L, and the molar ratio of phloroglucinol and sodium bicarbonate is 50;

[0048] Step 3, seal the sol and place it in an oven at 85°C, treat it for 5 days, cool to room temperature after gelation, take out the ...

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Abstract

The invention relates to a preparation method of a nanometer porous carbon material. The preparation method comprises the following steps: dissolving a template agent in a water solution, and uniformly stirring, thus obtaining a template agent water solution; adding phloroglucin and melamine into the template agent water solution, adding formaldehyde after completely dissolving, then adding a sodium bicarbonate solution, and uniformly stirring, thus forming sol; sealing and putting the sol in a baking oven for carrying out thermal treatment, thus forming gel; cooling to room temperature, thusobtaining organic wet gel; repeatedly washing the organic wet gel in a deionized water solution of sorbitan oleate, and then drying at normal pressure, thus obtaining an organic dry gel block. The nanometer porous carbon material prepared by the preparation method has the characteristics of adjustable density, low cost, high specific surface area and the like, and plays a critical role in the field of electrochemistry.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to a preparation method of a nanoporous carbon material. Background technique [0002] The research of nanoporous carbon materials has always been a research hotspot, showing excellent physical and chemical properties in the aspects of electricity, optics, heat, acoustics and electrochemistry. Nanoporous carbon materials prepared by the sol-gel process often rely on certain high-temperature and high-pressure equipment or low-temperature vacuum equipment during the drying process. However, the use of these equipment is unfavorable for actual production applications. Time-consuming and high risk factors make it difficult to achieve large-scale production. At present, in the industrial production process, nanoporous organic xerogels are often prepared by atmospheric pressure drying technology. This method uses a box dryer to allow the solvent in the gel to volatilize freely...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/318C01B32/336
CPCC01B32/318C01B32/336
Inventor 沈军吴学玲张志华
Owner TONGJI UNIV
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