Method for preparing mesoporous carbon with narrow pore size distribution

A technology of pore size distribution and pore carbon, which is applied in the direction of nano-carbon, can solve the problems of people and the environment that are easy to cause harm and pollution, and achieve the effects of promoting industrialization, environmental friendliness, and concentrated pore structure distribution

Inactive Publication Date: 2014-04-16
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is simple to operate and easy for industrial production, but HF is needed in the process of removing the template agent, which is easy to cause harm and pollution to people and the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Put 1 mol of phenol, 2 mol of formaldehyde, 0.1 mol of sodium hydroxide, 0.02 mol of 1-ethyl-3-methylimidazolium tetrafluoroborate and 55.6 mol of water into a three-necked flask at the same time, stir at 30°C for 3 hours, then raise the temperature Stir at a constant temperature of 75° C. for 3 hours, then cool naturally, filter, and dry to obtain a phenolic resin polymer containing an ionic liquid. The above-mentioned phenolic resin polymer was used as a carbon precursor, heated to 600°C in a carbonization furnace at a heating rate of 0.5°C / min, and then kept at a constant temperature for 3 hours. Then cool naturally to obtain mesoporous carbon (pore diameter: 2.1nm).

Embodiment 2

[0016] Put 1 mol of resorcinol, 5 mol of formaldehyde, 0.1 mol of sodium hydroxide, 0.05 mol of octaalkyl-3-methylimidazole perchlorate and 55.6 mol of water into a three-necked flask at the same time, and stirred at 35°C for 3.5 hours, Then, the temperature was raised to 78° C. and stirred at a constant temperature for 3 hours, then naturally cooled, filtered, and dried to obtain a phenolic resin polymer containing an ionic liquid. The above-mentioned phenolic resin polymer was used as the carbon precursor, heated to 650 °C in a carbonization furnace at a heating rate of 1 °C / min, and then kept at a constant temperature for 3 hours. Then cool naturally to obtain mesoporous carbon (pore size: 3.5nm).

Embodiment 3

[0018] Put 1 mol of phenol, 3 mol of formaldehyde, 0.1 mol of sodium hydroxide, 0.08 mol of hexadecyl-3-methylimidazole acetate and 55.6 mol of water into a three-necked flask at the same time, stir at 40°C for 4 hours, and then heat up to Stir at a constant temperature of 80°C for 2.5 hours, then cool naturally, filter, and dry to obtain a phenolic resin polymer containing an ionic liquid. The above-mentioned phenolic resin polymer was used as a carbon precursor, heated to 700°C in a carbonization furnace at a heating rate of 1.5°C / min, and then kept at a constant temperature for 2.5 hours. Then cool naturally to obtain mesoporous carbon (pore size: 5.8nm).

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Abstract

The invention relates to a method for preparing mesoporous carbon with narrow pore size distribution, which comprises the following steps of: simultaneously placing phenol, formaldehyde, sodium hydroxide, ionic liquid and water into three flasks; stirring for 3 to 5 hours at a temperature of 30 to 50 DEG C; then heating to the temperature of 75 DEG C to 90 DEG C and stirring for 1 to 3 hours at a constant temperature; naturally cooling, filtering and drying to obtain phenolic resin polymer containing the ionic liquid; after heating the phenolic resin polymer containing the ionic liquid, which is used as a carbon precursor, to the temperature of 600 to 1,000 DEG C in a carbonization furnace at a heating rate of 0.5 to 5 DEG C per minute, keeping the constant temperature for 0.5 to 3 hours; and then naturally cooling to obtain the mesoporous carbon, wherein the molar ratio of the phenol, the formaldehyde, the sodium hydroxide, the ionic liquid and the water is 1:(2 to 7):0.1:(0.02 to 0.1):55.6. The method has the advantages that the method has simple process route and few process steps, is environmental-friendly and is beneficial to industrial popularization.

Description

technical field [0001] The invention belongs to the field of preparation of porous carbon, in particular to a method for preparing mesoporous carbon with narrow pore size distribution. Background technique [0002] Mesoporous carbon has large pore size, high specific surface area, sufficient chemical stability, and excellent acid and alkali resistance, and has been widely used in liquid phase macromolecule adsorption, catalyst support, and energy storage. The control methods of mesopores in carbon materials include deep physical activation, chemical activation, catalytic activation, polymer blending, organogel carbonization and other methods. Although the above method can prepare mesoporous carbons containing mesopores, there are disadvantages such as wide distribution of mesopore size, difficult control of pore size, and complicated process. The template method, which has developed rapidly in recent years, has attracted extensive attention from researchers due to its advan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02C01B32/15
Inventor 孙国华李开喜
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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