Carbon dioxide adsorption material and preparation method thereof

An adsorption material, carbon dioxide technology, applied in chemical instruments and methods, separation methods, other chemical processes, etc., can solve the problems of inability to meet the needs of carbon dioxide capture, poor thermal stability of nitrogen-containing functional groups, uneven distribution, etc. The effect of carbon dioxide adsorption capacity, improvement of surface properties, and increase of carbon dioxide adsorption capacity

Pending Publication Date: 2022-07-08
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Treating carbon materials with a single method to improve physical and chemical properties such as pore volume, pore size, and functional groups has been unable to meet the growing demand for carbon dioxide capture
Moreover, the modified material still has problems such as poor thermal stability, small amount, and uneven distribution of nitrogen-containing functional groups.

Method used

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  • Carbon dioxide adsorption material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A carbon dioxide adsorption material and a preparation method thereof, comprising the following steps:

[0031] Step 1. Take 0.5g of carbon material and ultrasonically treat it in 5ml of ultrapure water for 5-10min; then add 0.1mol / L nitric acid dropwise to the obtained dispersion until the pH value of the dispersion=3; then at a constant temperature of 60°C Digestion for 2 hours. The carbon materials are carbon nanotubes, graphene or activated carbon.

[0032] In step 2, the carbon material activated by nitric acid in step 1 was washed 3 times at normal temperature with ultrapure water, and then dried at a constant temperature of 60°C in a constant temperature drying oven.

[0033] Step 3. After fully mixing the dried carbon material and glass beads obtained in step 2, it is flatly placed into the reaction chamber of the plasma modification equipment.

[0034] like figure 1 As shown, the plasma modification equipment includes a nitrogen source 1, an oxygen source 2,...

Embodiment 2

[0037] A carbon dioxide adsorption material and a preparation method thereof, comprising the following steps:

[0038] Step 1. Take 1 g of carbon material, ultrasonically treat it in 10 ml of ultrapure water for 5 min, then add 0.1 mol / L nitric acid to the obtained dispersion dropwise until the pH value of the dispersion is 3, and then digest it for 2 hours at a constant temperature of 60 °C . As the carbon material, carbon nanotubes, graphene or activated carbon are used.

[0039] In step 2, the carbon material activated by nitric acid in step 1 was washed 3 times at normal temperature with ultrapure water, and then dried at a constant temperature of 60°C in a constant temperature drying oven.

[0040] Step 3. After fully mixing the dried carbon material and glass beads obtained in step 2, it is flatly placed into the reaction chamber of the plasma modification equipment. The plasma modification equipment is the same as in Example 1.

[0041] Step 4: Keep the helium volume a...

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Abstract

The invention discloses a carbon dioxide adsorption material and a preparation method thereof. The chemical property of the surface of the carbon material is easily influenced by heteroatoms, a nitrogen-containing functional group can show a special hydrogen-bond interaction, and the interaction between carbon dioxide and the functional group is increased by hydroxyl through the hydrogen-bond interaction and electrostatic potential, so that the adsorption of carbon dioxide is facilitated. The carbon dioxide adsorption provided by the invention is obtained by activating the carbon nanotubes in an acidic system and carrying out plasma modification. The carbon nanotube material is subjected to plasma modification, the number of surface micropores of the obtained carbon dioxide adsorption material is increased, the surface aperture is reduced, and the carbon dioxide adsorption capacity of the carbon dioxide adsorption material is remarkably improved. In addition, through plasma modification, the number of nitrogen-containing functional groups of the carbon nanotube material is increased, the electron density of the carbon surface is increased, the surface polarity is increased, and therefore the carbon dioxide adsorption amount is increased.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide adsorption, and particularly relates to a carbon dioxide adsorption material and a preparation method thereof. Background technique [0002] Nanoscale carbonaceous materials have attracted much attention due to their high strength, high corrosion resistance, electrical conductivity, stability and excellent adsorption capacity. Among them, carbon materials have the advantages of large specific surface area, abundant pore structure and easy regulation, etc., and can be used as adsorbents for effectively capturing carbon dioxide molecules. [0003] The main influencing factors of carbon dioxide adsorption are the surface structure and surface physicochemical properties of carbon materials, such as the molecular dynamics diameter of carbon dioxide. Confinement sieving effect with pores, and the relationship between adsorbent surface polarity and CO 2 (Polarization: 29.1ⅹ10 25 cm 3 )Intera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02
CPCB01J20/205B01J20/20B01D53/02B01D2257/504Y02P20/151Y02C20/40
Inventor 叶志平赵亮籍嘉昱王家德
Owner ZHEJIANG UNIV OF TECH
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