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A kind of preparation method of three-dimensional hierarchical porous activated carbon material

A hierarchical porous and activated carbon technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of many steps, harsh preparation conditions, and long preparation cycle, and achieve simple operation, low operating cost, and thoughtful design ingenious effect

Active Publication Date: 2017-05-03
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The pore structure and structure of the porous carbon material prepared by the template method can be adjusted, but the disadvantage is that the preparation cycle is long and there are many steps. The preparation of the three-dimensional hierarchical porous carbon material sometimes requires a variety of templates of different sizes.
The carbide derivatization method can also effectively control the pore structure of porous carbon, but its preparation conditions are relatively harsh.
In general, the porous carbon material obtained by the above method needs to be activated to further increase the specific surface area and obtain a suitable pore structure, which makes the preparation of three-dimensional hierarchical porous activated carbon materials more time-consuming and cumbersome.

Method used

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  • A kind of preparation method of three-dimensional hierarchical porous activated carbon material
  • A kind of preparation method of three-dimensional hierarchical porous activated carbon material
  • A kind of preparation method of three-dimensional hierarchical porous activated carbon material

Examples

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Effect test

Embodiment 1

[0042] A method for preparing a three-dimensional hierarchical porous activated carbon material, comprising the steps of:

[0043] 1) Dissolve 50 mg KOH in 50 mL of water, and sonicate for 0.5 min in a water bath ultrasonicator with a power setting of 50 W to obtain a KOH aqueous solution with a concentration of 0.001 g / mL;

[0044] 2) Add 25mg of Resol-type phenolic resin to the above KOH aqueous solution, stir with magnetic force for 5min, and the rotation speed is 100 rpm;

[0045] 3) Put the mixture obtained in step 2) into a quartz tube furnace, pass through nitrogen protection, and carbonize at 400 ° C for 10 hours;

[0046] 4) After cooling the carbonized product to room temperature, wash it with dilute hydrochloric acid and water successively for several times, and then dry it at room temperature for 48 hours.

[0047] By scanning electron microscopy, nitrogen adsorption and desorption and mercury intrusion analysis, it is known that the activated carbon material obta...

Embodiment 2

[0049] A method for preparing a three-dimensional hierarchical porous activated carbon material, comprising the steps of:

[0050] 1) Dissolve 1 g of KOH in 1 mL of water, and sonicate for 5 min in a water bath ultrasonicator with a power setting of 150 W to obtain a KOH aqueous solution with a concentration of 1 g / mL;

[0051] 2) Add 0.4g of Resol-type phenolic resin to the above KOH aqueous solution, stir with magnetic force for 15min, and the rotation speed is 200 rpm;

[0052] 3) Put the mixture obtained in step 2) into a quartz tube furnace, introduce nitrogen protection, and carbonize at 700°C for 120min;

[0053] 4) After the product obtained by carbonization was cooled to room temperature, washed several times with dilute hydrochloric acid and water in turn, and dried at 100°C for 12 hours.

[0054] figure 1 The scanning electron microscope picture of the three-dimensional hierarchical porous carbon material obtained in this example; figure 2 for figure 1 Partiall...

Embodiment 3

[0057] A method for preparing a three-dimensional hierarchical porous activated carbon material, comprising the steps of:

[0058] 1) Add 10 g of KOH to 1 mL of water, stir with magnetic force for 30 min, and rotate at 250 rpm to obtain a KOH / water mixture with a concentration of 10 g / mL;

[0059] 2) Add 0.5g of Resol-type phenolic resin to the above KOH / water mixture, stir with magnetic force for 60min, and rotate at 300 rpm;

[0060] 3) Put the mixture obtained in step 2) into a quartz tube furnace, pass through argon protection, and carbonize at 1500°C for 0.01h;

[0061] 4) After the product obtained by carbonization was cooled to room temperature, washed several times with dilute hydrochloric acid and water in turn, and dried at 150°C for 12 hours.

[0062] By scanning electron microscope, nitrogen adsorption and desorption and mercury intrusion analysis, it is known that the activated carbon material obtained in this example has a three-dimensional hierarchical porous s...

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Abstract

The invention relates to a preparation method of a three dimensional graded porous activated carbon material, the method is as follows: a chemical activator itself is used as a template hole forming agent, on the basis of formation of pore channel in the chemical activator, micropores and mesopores are further formed by corrosion, and eventually the three dimensional graded porous activated carbon material simultaneously having macropores, mesopores and micropores is formed. The activated carbon material prepared by the method has a very large specific surface area, a mutually-comunicated porous structure, larger pore size and high conductivity. The material can be widely used as electrode materials, adsorption materials, catalysts, catalyst carriers, hydrogen storage materials, electric adsorption desalting electrode materials and the like of energy storage devices; the preparation method of the three dimensional graded porous activated carbon material has the advantages of simple operation and low cost, and is convenient for industrial production.

Description

technical field [0001] The invention relates to a preparation method of a three-dimensional hierarchical porous activated carbon material, in particular to a method for preparing a three-dimensional hierarchical porous activated carbon by using a chemical activator itself as a template agent. Background technique [0002] Three-dimensional hierarchical porous activated carbon materials mainly refer to activated carbon materials that simultaneously contain micropores (less than 2nm), mesopores (between 2nm and 50nm) and macropores (greater than 50nm) and present a three-dimensional framework in space with a highly developed void structure. . Due to its large specific surface area, large pore capacity, high electrical conductivity and strong mechanical stability, it is widely used in gas separation, water purification, catalysis, chromatographic analysis, energy storage and other fields. The research on materials and applications has aroused great interest in the scientific c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/342C01B32/348
Inventor 刘晨明李明杰曹宏斌张懿
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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