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Universal method for preparing multi-shell hollow metal organic framework

A metal-organic framework and general method technology, which is applied in the field of synthesis of functional material hollow metal-organic frameworks, can solve the problems of increased structure, lack of simple, general and controllable synthesis methods, etc., and achieves short reaction time, low cost, high production high rate effect

Active Publication Date: 2021-11-16
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with MOFs with solid and single-double-shell hollow structures, the synthesis of MOFs with multi-shell hollow structures is more challenging due to the increase in structural complexity, lack of simple, general, and controllable synthetic methods, which has become a major issue for MOFs. Bottlenecks in development and application

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  • Universal method for preparing multi-shell hollow metal organic framework
  • Universal method for preparing multi-shell hollow metal organic framework
  • Universal method for preparing multi-shell hollow metal organic framework

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A general method for preparing multi-shelled hollow metal-organic frameworks, comprising the following steps:

[0036] (1) The preparation method of IRMOF-74-II powder is as follows:

[0037] Dissolve 0.2g zinc acetate dihydrate in 0.05ml ethanol, 0.05ml deionized water, 1ml N,N-diethylformamide to form solution A2, 88mg 3,3'-dihydroxy-4,4'-diphenyl Dissolve formic acid in 0.05ml of ethanol, 0.05ml of deionized water, and 1ml of N,N-diethylformamide to form solution B2. Pour solution A2 into solution B2, place in an autoclave, keep warm at 110°C for 24h, and the product Centrifuge, then wash with DMF, and dry in an oven at 80°C for 10 hours to obtain IRMOF-74-II powder;

[0038] (2) Disperse 0.2g IRMOF-74-II powder in a mixed solution of 9ml ethanol and 1ml deionized water to form suspension C;

[0039] (3) Dissolve 15g of 2-methylimidazole in a mixed solution of 27ml of ethanol and 3ml of deionized water to form solution D;

[0040] (4) Put the solution D in a water...

Embodiment 2

[0042]A general method for preparing multi-shelled hollow metal-organic frameworks, comprising the following steps:

[0043] (1) The preparation method of ZnCo-MOF-5 powder is as follows:

[0044] 1.3g zinc acetate dihydrate and 0.262g cobalt acetate tetrahydrate were dissolved in 35ml DMF to form solution A3, 0.15g terephthalic acid was dissolved in 15ml DMF to form solution B3, solution A3 was poured into solution B3, transferred to an autoclave, and 95°C, heat preservation for 10h, centrifuge the product, and then wash it with DMF to obtain ZnCo-MOF-5 powder;

[0045] (2) Disperse 0.2g ZnCo-MOF-5 powder in 10ml ethanol solution to form suspension C;

[0046] (3) 2g of 2-methylimidazole was dissolved in 30ml of ethanol solution to form solution D;

[0047] (4) Place solution D at 0°C, add 40 μl triethylamine, pour into suspension C, stir for 2 hours, centrifuge the product, then wash with ethanol and deionized water in sequence, and finally dry in an oven at 80°C After 10...

Embodiment 3

[0049] A general method for preparing multi-shelled hollow metal-organic frameworks, comprising the following steps:

[0050] (1) The preparation method of ZnCo-ZIF powder is as follows:

[0051] Dissolve 0.218g of zinc nitrate hexahydrate and 0.495g of cobalt nitrate hexahydrate in 25ml of deionized water to form solution A4, and dissolve 10.9g of 2-methylimidazole and 0.012g of hexadecyltrimethylammonium bromide in 160ml of deionized water to form Pour solution B4 and solution A4 into solution B4, stir for 16 minutes, centrifuge the product, and then wash with deionized water and ethanol in sequence to obtain ZnCo-ZIF powder;

[0052] Disperse 6mg of ZnCo-ZIF powder in 10ml of DMF to form suspension C;

[0053] (3) Dissolve 6mg of 2,5-dihydroxyterephthalic acid in 30ml of DMF to form solution D;

[0054] (4) Pour the suspension C into the solution D and place it in an autoclave, keep it warm at 130°C for 12 hours, centrifuge the product, then wash it with ethanol and deion...

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Abstract

The invention discloses a universal method for preparing a multi-shell hollow metal organic framework. The method comprises the following steps: (1) dispersing precursor MOFs in an organic solution to form a suspension C; (2) dissolving an organic ligand in an organic solution to form a solution D; (3) adding 0-10ml of triethylamine into the solution D, adding the suspension C, keeping the temperature at 0-150 DEG C, and keeping the temperature for 5 minutes to 24 hours; and centrifugally separating the product, then washing the product with ethanol and deionized water for multiple times in sequence, and finally drying the product in a drying oven at 80-100 DEG C for 10-20 hours to obtain the target MOF powder with a multi-shell hollow structure. The method is simple to operate and low in cost, the process is easy to control and observe, mass production can be carried out, and the prepared multi-shell hollow MOF material has wide application prospects and can be used in the fields of separation, sensing, catalysis, drug slow release, wave absorption, energy and the like.

Description

technical field [0001] The invention relates to the technical field of synthesis of functional material hollow metal organic frameworks, in particular to a general method for preparing multi-shell hollow metal organic frameworks. Background technique [0002] In recent years, metal-organic frameworks (MOFs, metal-organic frameworks) with periodic network structures formed by the self-assembly of metal ions and organic ligands have attracted more and more attention. MOFs materials have the advantages of high porosity, large specific surface area, regular channels, adjustable skeleton size, and the diversity and modifiability of organic ligands. They have been widely used in the fields of separation, hydrogen storage, catalysis, sensing, and energy conversion and storage. Extremely wide range of applications, showing performance superior to conventional porous crystal structure materials. The multi-shell hollow structure MOFs is a special micro / nano structure, and multiple sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00
CPCC08G83/008
Inventor 余东波高晴亮王菲崔接武吴玉程
Owner HEFEI UNIV OF TECH