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Preparation method of blocky porous carbon with large specific surface area

A technology with high specific area and high specific surface area, which is applied in the field of porous carbon, can solve problems such as difficulty in ensuring product consistency, difficult control of pressure and temperature, unfavorable industrial production, etc., achieving less production equipment, convenient operation, and suitable for large-scale The effect of production

Active Publication Date: 2016-06-22
FUJIAN XFH NEW ENERGY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method uses a hydrothermal carbonization method with mild conditions, the pressure and temperature in the hydrothermal kettle are difficult to control, and the consistency of the product is difficult to guarantee.
Moreover, the condition is mild, and the ratio of the prepared bulk porous carbon material is only 700m 2 / g, which is much lower than the specific surface area of ​​activated carbon bonded casting products. It needs to be activated by water vapor to reach a specific surface area of ​​2600m 2 / g, the activation energy consumption is particularly large, which is not conducive to industrial production

Method used

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  • Preparation method of blocky porous carbon with large specific surface area

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Embodiment 1

[0015] A preparation method of high specific area block porous carbon, mixing according to the mass ratio of phenols: sugars: water: ionic liquid = 1: 1: 10: 0.01, firstly, mixing phenols and sugars, and then adding Deionized water is used to fully dissolve the phenols and sugars in the mixture at 50°C, then add the ionic liquid, stir and mix evenly at 50°C, place in a microwave oven with a power of 1000w, and heat for 10s to obtain The material is washed with water and ethanol and then dried to obtain a bulky porous carbon material with a high specific surface area.

[0016] The phenols are phenol; the sugars are glucose; the ionic liquid is N-methylbutylpyrrolidine bis-trifluoromethanesulfonimide salt

Embodiment 2

[0018] A preparation method of a high specific area block porous carbon, mixing according to the mass ratio of phenols: sugars: water: ionic liquid = 1:4:40:1, first mixing the phenols and sugars, and then adding Deionized water, and stirred at 50°C to fully dissolve phenols and sugars, then added ionic liquid, stirred and mixed evenly at 50°C, placed in a microwave oven with a power of 400w, heated for 600s, and the obtained material was water After washing with ethanol and drying, a high specific surface area bulk porous carbon material is obtained.

[0019] The phenols are formed by mixing phenol, resorcinol, and phloroglucinol at a mass ratio of 1:1:1; the sugars are formed by mixing fructose and cellulose at a mass ratio of 1:2; the ionic liquid is 1 -Ethyl-3-methylimidazole tetrafluoroborate, trimethylpropylammonium bistrifluoromethanesulfonimide salt and 1-hexyl-3-methylimidazole bistrifluoromethanesulfonimide salt by mass The ratio is 1:2:3 mixed.

Embodiment 3

[0021] A preparation method of high specific area bulk porous carbon, mixing according to the mass ratio of phenols: sugars: water: ionic liquid = 1: 2: 20: 0.3, first mixing phenols and sugars, and then adding Deionized water, and stir at 50°C to fully dissolve phenols and sugars, then add ionic liquid, stir and mix evenly at 50°C, place in a microwave oven with a power of 700w, heat for 450s, and the obtained material is water After washing with ethanol and drying, a high specific surface area bulk porous carbon material is obtained.

[0022] The phenol is resorcinol; the sugar is lactose; and the ionic liquid is N-methylbutylpiperidine bistrifluoromethanesulfonimide salt.

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Abstract

The invention discloses a preparation method of blocky porous carbon with a large specific surface area. Phenols, polysaccharides, water and ionic liquid are mixed in a mass ratio of 1:(1-4):(10-40):(0.01-1). The preparation method comprises the following steps: firstly, mixing the phenols and the polysaccharides; adding deionized water; stirring the mixture at a temperature of 50 DEG C in order that the phenols and the polysaccharides are fully dissolved; adding the ionic liquid; uniformly mixing at a temperature of 50 DEG C while stirring; putting the mixture into a microwave oven of which the power is 400-1000w; heating for 10-600s; flushing the obtained material with water and ethanol, and drying to obtain a blocky porous carbon material with a large specific surface area. In the method, the polysaccharides and the phenols are used as reaction monomers, the ionic liquid is added to serve as a solvent and a templating agent, and heating is performed through a one-step microwave method to form the blocky porous carbon with the large specific surface area. The specific surface area of the prepared blocky porous carbon is up to 1500m<2> / g. The method has the advantages of simple process, convenience in operation, less equipment, further reduction of the cost, convenience in popularization and application, and suitability for mass production.

Description

technical field [0001] The invention relates to the technology in the field of porous carbon, and in particular provides a preparation method of high specific area bulk porous carbon. Background technique [0002] The bulk porous carbon material has the characteristics of good corrosion resistance stability (acid-base stability, etc.), good electrical conductivity, and super adsorption capacity. It is of great significance both in basic research and practical application. The traditional preparation of bulk carbon materials is mainly through bonded casting, template replication, aerosol, etc. The disadvantage of bonded casting is that the type and amount of binder have a great influence on the mechanical strength and pore volume of bulk carbon. However, the method of template replication needs to first synthesize bulk silica material, so the cost is high, the time is long, and it is not easy to industrialize; the method of aerosol needs to strictly control the experimental...

Claims

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Application Information

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IPC IPC(8): C01B31/02
CPCC01P2006/12C01P2006/90
Inventor 宋宏芳赵东辉李芳戴涛周鹏伟
Owner FUJIAN XFH NEW ENERGY MATERIALS CO LTD
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