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Composite adsorption material with MAR and MIL-53 (Al) combined and preparation method thereof

A technology of composite adsorption materials and composite materials, which is applied in the field of air pollutant purification materials, can solve the problems that MOFs cannot be assembled into air filters, molecules are easy to pass through pores, and filtration applications are not good, so as to achieve strong adsorption application potential, The effect of good repeatability and simple process

Inactive Publication Date: 2016-05-04
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because its crystal size is too small to make granular products, it is still not good for filtering applications of ultra-low concentrations of small molecule gas pollutants
Generally speaking, on the one hand, if the pore size in porous materials is greater than twice the kinetic equivalent diameter of gas molecules, molecules will easily pass through the pores, and the filtration efficiency is low; on the other hand, the average particle size of MOFs crystals with uniform microporous structure The diameters are at the micron level, which makes it impossible to assemble MOFs into air filters in practical use
Therefore, at this stage, there are still certain technical bottlenecks in the filtration of ultra-low concentration small molecular gas pollutants.

Method used

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  • Composite adsorption material with MAR and MIL-53 (Al) combined and preparation method thereof
  • Composite adsorption material with MAR and MIL-53 (Al) combined and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 1.245g of terephthalic acid and 4.220g of aluminum nitrate into the DMF solution with a volume fraction of 60%, and stir at 80°C until the terephthalic acid and aluminum nitrate are completely dissolved. Then, select the pore diameter of the porous resin to be 120nm, wash with absolute ethanol and a large amount of water, and vacuum-dry, add the dried macroporous adsorption resin to the above solution, and magnetically stir at 65°C for 25h. The mixed solution was transferred to a Teflon-lined reactor and heated at 130° C. for 48 h. After the reaction, the obtained milky precipitate was centrifuged and washed with methanol and dichloromethane to remove unreacted organic ligands. Finally, the obtained sample was vacuum-dried in a vacuum oven at 80°C for 24 hours to obtain a composite adsorbent material combining MAR and MIL-53 (Al).

[0023] The prepared composite material 1 was passed through a mixed gas composed of benzene, formaldehyde and nitrogen, and a static a...

Embodiment 2

[0025] Add 1.245g of terephthalic acid and 4.220g of aluminum nitrate into the DMF solution with a volume fraction of 60%, and stir at 80°C until the terephthalic acid and aluminum nitrate are completely dissolved. Then, select the pore diameter of the porous resin to be 200nm, wash with absolute ethanol and a large amount of water, and vacuum-dry, add the dried macroporous adsorption resin to the above solution, and magnetically stir at 65°C for 25h. The mixed solution was transferred to a Teflon-lined reactor and heated at 130° C. for 48 h. After the reaction, the obtained milky precipitate was centrifuged and washed with methanol and dichloromethane to remove unreacted organic ligands. Finally, the obtained sample was vacuum-dried in a vacuum oven at 80°C for 24 hours to obtain a composite adsorbent material combining MAR and MIL-53 (Al).

[0026] The prepared composite material 2 was passed through a mixed gas composed of benzene, formaldehyde and nitrogen, and a static a...

Embodiment 3

[0028] Add 1.245g of terephthalic acid and 4.220g of aluminum nitrate into the DMF solution with a volume fraction of 60%, and stir at 80°C until the terephthalic acid and aluminum nitrate are completely dissolved. Then, select the pore diameter of the porous resin to be 300nm, wash with absolute ethanol and a large amount of water, and vacuum-dry, add the dried macroporous adsorption resin to the above solution, and magnetically stir at 65°C for 25h. The mixed solution was transferred to a Teflon-lined reactor and heated at 130° C. for 48 h. After the reaction, the obtained milky precipitate was centrifuged and washed with methanol and dichloromethane to remove unreacted organic ligands. Finally, the obtained sample was vacuum-dried in a vacuum oven at 80°C for 24 hours to obtain a composite adsorbent material combining MAR and MIL-53 (Al).

[0029] The obtained composite material 3 was passed through a mixed gas composed of benzene, formaldehyde and nitrogen, and a static a...

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Abstract

The invention relates to a preparation method of a composite adsorption material with MAR and MIL-53 (Al) combined. The composite adsorption material is a carrier growing by adopting porous resin (MAR) as crystals, a metal organic frame material is formed by organic ligands in the porous resin, and the outer diameter of particles of the composite material ranges from 3 mm to 6 mm. A solvent thermal method is adopted for preparing the composite adsorption material with MAR and MIL-53 (Al) combined, the composite material solves the problem that a single MIL-53 (Al) material can only form powder and cannot be used for air filtering and the problem that the porous resin is too large in aperture and small in specific area, and the existing technical bottleneck of filtering of ultralow-concentration micromolecular gaseous pollutants in actual application can be broken through.

Description

technical field [0001] The invention belongs to the field of preparation of air pollutant purification materials, and in particular relates to a composite adsorption material combined with MAR and MIL-53 (Al) and a preparation method thereof. Background technique [0002] At present, air pollution has become a topic of increasing concern, from indoor ambient air to urban atmospheric environment, to global air pollution. According to data released by the World Health Organization, in 2012, the number of deaths from various diseases caused by air pollution in the world was about 7 million. For a healthy and high-quality living environment, it is necessary to improve and invent new purification materials and equipment. Especially for some polluting gases with small particle size (0.1-0.9nm), such as formaldehyde (0.414nm), benzene (0.58nm), methane (0.414nm), etc., the existing porous materials (activated carbon, macroporous resin ), the adsorption effect of these small molec...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30B01D53/02B01J20/28
CPCB01D53/02B01D2253/204B01D2253/306B01D2253/308B01D2253/311B01D2257/702B01J20/226B01J20/26B01J20/28066B01J20/28076B01J20/2808B01J2220/445B01J2220/4812
Inventor 徐斌龚宇金诚妙
Owner TONGJI UNIV
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