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Super-microporous hydrophobic UiO-66 zirconium metal organic framework material as well as preparation method and application thereof

A metal-organic framework and uio-66 technology, applied in chemical instruments and methods, other chemical processes, reagents, etc., can solve the problems of poor adsorption and separation performance and poor hydrophobicity, and achieve strong adsorption and separation capabilities and high temperature resistance , the effect of small particle size

Active Publication Date: 2021-06-18
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved in the present invention is to overcome the defects and deficiencies of existing metal organic framework materials such as poor gas adsorption and separation performance and poor hydrophobicity, and provide a kind of ultramicroporous hydrophobic UiO-66 zirconium metal organic framework material, Its gas adsorption and separation performance is excellent, for C 3 h 6 / C 3 h 8 High difference in adsorption capacity, high temperature resistance, good hydrophobicity

Method used

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  • Super-microporous hydrophobic UiO-66 zirconium metal organic framework material as well as preparation method and application thereof
  • Super-microporous hydrophobic UiO-66 zirconium metal organic framework material as well as preparation method and application thereof
  • Super-microporous hydrophobic UiO-66 zirconium metal organic framework material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] An ultramicroporous hydrophobic UiO-66 zirconium metal-organic framework material is prepared by coordinating trifluoromethylbenzoic acid and terephthalic acid with zirconium ions.

[0036] The preparation method of the above-mentioned ultra-microporous hydrophobic UiO-66 zirconium metal-organic framework material comprises the following steps:

[0037] Add 0.23g of zirconium tetrachloride and 0.019g of 2-trifluoromethylbenzoic acid to 60ml of DMF and stir for 2 hours for pre-mixing, then add 0.17g of terephthalic acid to the mixed liquid, and stir at 300 rpm Stir and dissolve for 10 minutes, move the resulting mixed solution into a stainless steel autoclave made of polytetrafluoroethylene, raise it from room temperature to 120°C at a rate of 1.0°C / min, and keep it at 120°C for 20h. The product was washed with DMF and ethanol for 3 to 4 times respectively, centrifuged at 8000r / min for 3min, and the lower layer product was dried in an oven at 70°C for 20h, and then dried...

Embodiment 2

[0039] An ultramicroporous hydrophobic UiO-66 zirconium metal-organic framework material is prepared by coordinating trifluoromethylbenzoic acid and terephthalic acid with zirconium ions.

[0040] The preparation method of the ultra-microporous hydrophobic UiO-66 zirconium metal-organic framework material is the same as in Example 1, except that 2-trifluoromethylbenzoic acid is replaced by 3-trifluoromethylbenzoic acid.

Embodiment 3

[0042] An ultramicroporous hydrophobic UiO-66 zirconium metal-organic framework material is prepared by coordinating trifluoromethylbenzoic acid and terephthalic acid with zirconium ions.

[0043] The preparation method of the ultra-microporous hydrophobic UiO-66 zirconium metal-organic framework material is the same as in Example 1, except that 2-trifluoromethylbenzoic acid is replaced by 4-trifluoromethylbenzoic acid.

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Abstract

The invention discloses an ultra-microporous hydrophobic UiO-66 zirconium metal organic framework material and a preparation method and an application thereof. The ultra-microporous hydrophobic UiO-66 zirconium metal organic framework material grafted with trifluoromethyl is prepared by conducting coordination on organic ligands and zirconium ions, the organic ligands are trifluoromethyl benzoic acid and terephthalic acid, the competitive coordination mechanism of two ligands of trifluoromethyl benzoic acid and terephthalic acid is utilized to synergistically improve the zirconium-oxygen coordination ability and pore surface chemical properties, and the prepared ultra-microporous hydrophobic UiO-66 zirconium metal organic framework material is good in thermal stability, resistant to high temperature and relatively high in hydrophobicity; the adsorption separation capacity is high, and the performance of separating C3H6 / C3H8 is excellent.

Description

technical field [0001] The present invention relates to the technical field of metal-organic framework materials, and more specifically relates to an ultra-microporous hydrophobic UiO-66 zirconium metal-organic framework material and its preparation method and application. Background technique [0002] Metal-organic frameworks (MOFs), also known as metal-organic ligand networks and porous coordination polymers, are usually synthesized through a coordination-directed self-assembly process under mild conditions. Because of the advantages of high porosity, high specific surface area, adjustable pore size, adjustable metal nodes and organic ligands, MOFs have shown excellent performance in the fields of biomedicine, gas storage, proton conduction, photoelectromagnetic catalysis, and gas adsorption and separation. application prospects. Especially in the adsorption separation of various light hydrocarbon gases, it can be used to separate gases with different adsorption effects o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00B01J20/22
CPCC08G83/008B01J20/226Y02P20/151
Inventor 纪红兵韩军胡鹏王永庆
Owner SUN YAT SEN UNIV
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