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Method for preparing mesoporous carbon with controllable aperture distribution

A technology of pore size distribution and pore carbon, which is applied in the preparation/purification of carbon, etc., can solve the problems of a large amount of solvents, difficulty in large-scale production, complex preparation process, etc., and achieve the effect of low product cost

Inactive Publication Date: 2012-06-20
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can control the pore structure of mesoporous carbon, it requires a synthetic molecular sieve template, and the preparation process is complicated.
Recently, Song Yan et al. used nanoparticles as templates to prepare mesoporous carbons with controllable pore size distribution, but this preparation method required a large amount of solvent, (Pore development of thermosetting phenol resin derived mesoporous carbon through a commercially nanosized template Materials Science and Engineering A 473 (2008) 153-157) is difficult to produce on a large scale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add nano silicon oxide with a particle size of 8nm into the ethanol solution of thermosetting phenolic resin resin, the mass ratio of the two is 0.1:1, remove the solvent, the mass ratio of ethanol to phenolic resin is 5:1, and ball mill at 300 rpm for 2 hours, Curing at 80°C, carbonization at 500°C for 0.1h, washing with NaOH solution until no nanoparticles can be detected by conventional methods, and drying to obtain the product. Product performance indicators are shown in Table 1.

Embodiment 2

[0021] Add nano-zinc oxide with a particle size of 12nm into the toluene solution of asphalt, the mass ratio of the two is 2:1, remove the solvent, the mass ratio of toluene to asphalt is 1:1, ball mill at 200 rpm for 5 hours, and solidify at 200°C. Carbonize at 700°C for 2 hours, wash with HCl until no nanoparticles can be detected by conventional methods, and dry to obtain the product. Product performance indicators are shown in Table 1.

Embodiment 3

[0023] Add nano-magnesium oxide with a particle size of 15nm into the dimethyl sulfoxide solution of polyacrylonitrile, the mass ratio of the two is 10:1, remove the solvent, and the mass ratio of dimethyl sulfoxide to polyacrylonitrile is 10:1 , ball milled at 500 rpm for 0.5h, solidified at 400°C, carbonized at 1200°C for 3h, washed with HCl until no nanoparticles were detected by conventional methods, and dried to obtain the product. Product performance indicators are shown in Table 1.

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Abstract

The invention discloses a method for preparing mesoporous carbon with controllable aperture distribution. The method comprises the following steps of: dispersing nano particles into a carbon precursor solution, and performing ball milling and mixing, wherein the mass ratio of the nano particles to the carbon precursor is (0.1-10): 1; controlling the consumption of the solution to keep the mixture pasty; removing the solvent, and then performing carbonization for 0.1 to 3 hours at the temperature of between 500 and 1,200 DEG C in an inert atmosphere; cleaning with acid or alkali liquor to remove a template agent; and drying the sample, and thus obtaining the mesoporous carbon with controllable aperture distribution. The carbon precursor solution comprises an ethanol solution of thermosetting phenol resin, a methylbenzene solution of asphalt, a dimethyl sulfoxide solution of polyacrylonitrile and an aqueous solution of sucrose; the mass ratio of the solution to the carbon precursor is 1:1-10:1; and the ball milling speed is 200 to 500 revolutions per minute, and the ball milling time is 0.5 to 5 hours. The preparation method is simple; the cost of the product is low; and the mesoporous carbon of which the aperture distribution is centralized in nano particle diameter, can be prepared by using a small amount of solvent.

Description

technical field [0001] The invention relates to a method for preparing mesoporous carbon with controllable pore size distribution. Background technique [0002] Porous carbons have been widely used in gas-liquid phase adsorption, catalyst supports, and supercapacitor electrodes due to their high specific surface area, well-developed pores, and acid and alkali resistance. Mesoporous carbons with controllable pore size distribution are crucial to improve the utilization efficiency of mesoporous carbons. The preparation methods of porous carbon mainly include physical activation method, chemical activation method, catalytic activation method and template method. Physical activation method, chemical activation method and catalytic activation method can prepare porous carbon with high specific surface area and wide pore size distribution through appropriate process conditions. Although the organic template method in the template method can prepare mesoporous carbon with a certa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C01B32/05
Inventor 唐志红杨俊和何星王现英杨光智邱汉迅张慧娟赵斌
Owner UNIV OF SHANGHAI FOR SCI & TECH
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