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Preparation method of three dimensional graded porous activated carbon material

A technology of hierarchical porous and activated carbon, which is applied in the field of preparation of three-dimensional hierarchical porous activated carbon, which can solve the problems of harsh preparation conditions, long preparation cycle, and many steps, and achieve the effect of low operating cost, ingenious design of ideas, and simple operation

Active Publication Date: 2015-06-17
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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  • Preparation method of three dimensional graded porous activated carbon material
  • Preparation method of three dimensional graded porous activated carbon material
  • Preparation method of three dimensional graded porous activated carbon material

Examples

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Embodiment 1

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

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

[0044] 2) Add 25mg of Resol-type phenolic resin to the above KOH aqueous solution, and stir for 5 minutes with magnetic force at a speed of 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 the product obtained by carbonization was cooled to room temperature, it was washed several times with dilute hydrochloric acid and water in sequence, and then dried at room temperature for 48 hours.

[0047] Analysis by scanning electron microscopy, nitrogen adsorption and desorption, and mercury intrusion method shows that the activated carbon material ob...

Embodiment 2

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

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

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

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

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

[0054] figure 1 It is a scanning electron microscope picture of the three-dimensional hierarchical porous carbon material obtained in this embodiment; figure 2 for figure 1 Partial magni...

Embodiment 3

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

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

[0059] 2) Add 0.5g Resol type phenolic resin to the above KOH / water mixture, stir for 60min with magnetic force, and the speed is 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 carbonized product was cooled to room temperature, it was washed several times with dilute hydrochloric acid and water in sequence, and then dried at 150°C for 12 hours.

[0062] Analysis by scanning electron microscopy, nitrogen adsorption and desorption, and mercury porosimetry shows that the activated carbon material obtained in this example has a three-dimensional hierarchical porous structure, with a macrop...

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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 method for preparing 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. Background technique [0002] Three-dimensional hierarchical porous activated carbon materials mainly refer to activated carbon materials that 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 pore structure. . Due to its large specific surface area, large pore volume, high electrical conductivity, and strong mechanical stability, it is widely used in the fields of gas separation, water purification, catalysis, chromatographic analysis, and energy storage. The research on the application and application has aroused great interest in the scientific community, and it ...

Claims

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Application Information

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IPC IPC(8): C01B31/12
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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