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COF-coated MOF/M/L composite material and preparation method thereof

A composite material and MOF technology, which is applied in the field of COF@MOF/M/L composite materials and its preparation, can solve the problems of low removal rate of harmful substances, removal rate of only 50%, and room for improvement.

Active Publication Date: 2021-04-06
杭州阿德旺斯材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the removal rate of the existing COF@MOF composite materials for harmful substances is not high, the purpose is single, and there is room for improvement
Especially for chiral harmful substances, its removal rate is only about 50%

Method used

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  • COF-coated MOF/M/L composite material and preparation method thereof
  • COF-coated MOF/M/L composite material and preparation method thereof
  • COF-coated MOF/M/L composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] COF@MOF / M / L-1 Composites

[0025] Dissolve 4.0mmol of chromium nitrate nonahydrate and 1.25mmol of 2-hydroxyterephthalic acid in 25ml of DMF, ultrasonically disperse for 5min, and react at 80°C under reflux for 24h. After the reaction, cool naturally to room temperature and centrifuge to separate the product. Wash with DMF and methanol three times, dry in an oven at 65°C for 5h, and obtain MOF-1 sample; dissolve 5mg of MOF-1 sample in DMF solution of trimesal (2M, 5mL), ultrasonically disperse for 5min, and ultrasonically disperse During the process, 1,4-dioxane (2M, 5mL) solution of p-phenylenediamine was added dropwise, ultrasonically dispersed for 1h, then the mixed solution was placed in a sealed tube, reacted at 60°C for 24h, and the product was centrifuged to obtain The solid product was washed three times with methanol and dried under vacuum at 60°C for 2h to obtain COF@MOF-1; 0.5mg of CoCl 2 Dissolve in 15mL of DMF, then add 140mg of COF@MOF-1 to it, shake the ...

Embodiment 2

[0027] Disperse 3.8mmol of cobalt chloride and 1.15mmol of azobenzene-4,4-dicarboxylic acid in 20mL of DMF by ultrasonic dispersion, place the mixed solution in a reaction kettle, react at 120°C for 15h, and cool to room temperature naturally. The product was separated by centrifugation, washed three times with methanol, and dried in an oven at 55°C for 8 hours to obtain the MOF-2 sample; 8 mg of the MOF-2 sample was dissolved in the 1,4 - Dioxane solution (1.75M, 8mL), ultrasonically dispersed for 5min, and 0.1mL of 1M acetic acid solution was added dropwise, and 4,4,4,4-methylethanetetrayltetraphenylamine ( 2M, 3mL) solution, ultrasonically dispersed for 1 h, and then the mixed solution was placed in a sealed tube, reacted at 100 ° C for 24 h, centrifuged to separate the product, and the obtained solid product was washed three times with methanol and 1,4-dioxane, and Vacuum-dry at 60°C for 8 hours to obtain COF@MOF-2; dissolve 0.8mg of copper nitrate in 20mL of DMF, then add...

Embodiment 3

[0029] Dissolve 5.2mmol of ferric chloride and 1.8mmol of 2-methylimidazole in 30mL DMF / deionized water (1:0.2), drop acetic acid solution (0.02mL, 1M) into the ultrasonic dispersion process, and place the mixed solution In the reaction kettle, react at 140°C for 20h, naturally cool to room temperature, centrifuge the product, wash with methanol three times, and dry in an oven at 80°C for 5h to obtain the MOF-3 sample; dissolve 7mg of the MOF-3 sample in 2,5- In the DMF solution of dimethoxybenzene-1,4-dicarbaldehyde (1.5M, 10mL), ultrasonically disperse for 5min, and drop into 0.1mL of 1M hydrofluoric acid solution, drop 5,15-( Aminophenyl)-10,20-phenylporphyrin in DMF (2M, 3mL) solution, ultrasonically dispersed for 30min, then the mixed solution was placed in a sealed tube, reacted at 110°C for 48h, and the product was centrifuged to obtain a solid The product was washed three times with DMF, and vacuum-dried at 60°C for 8 hours to obtain COF@MOF-3; 0.5 mg of silver nitrate...

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Abstract

The invention discloses a COF-coated MOF / M / L composite material, which comprises a COF-coated MOF material with a core-shell structure synthesized by a COF-coated MOF crystal material, the MOF of the COF-coated MOF material is firstly subjected to synthesis, then is subjected to metal ion exchange, and then is subjected to ligand exchange to form the COF-coated MOF / M / L composite material with metal ions and chiral ligands. Meanwhile, the invention discloses a preparation method of the COF-coatedMOF / M / L composite material. The COF-coated MOF / M / L composite material disclosed by the invention has the characteristics of a COF-coated MOF material with a core-shell structure; meanwhile, metal ions such as copper or iron with an efficient catalytic degradation function and chiral functional organic ligands such as Llactic acid or histidine are introduced, so that nodes of the MOF have high catalytic activity of monatomic catalysis, and chiral toxic pollutants such as cis-permethrin and cis-permethrin are effectively identified by utilizing chiral-chiral interaction; chiral pollutants can be selectively, quickly, efficiently and thoroughly catalytically degraded into non-toxic substances.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a COF@MOF / M / L composite material and a preparation method thereof. Background technique [0002] New nanoporous materials are one of the three-dimensional porous materials that have developed rapidly since the 21st century, among which the metal-organic framework (MOF) is well-known. In the past decade, covalent organic frameworks (COFs) have also emerged, showing strong application potential in the fields of gas adsorption, chemical separation, catalysis, chemical sensing, optoelectronics, and energy storage. [0003] The team of professors Pingyun Feng and Xianhui Bu from the University of California system developed an integrated COF@MOF collaborative assembly strategy, through MOF: [(M3-(OH)1-x(O)x(COO)6] type and COF :[B3O3(py)3]-type stacking. Using this strategy, the coordination-driven assembly of the acs configuration framework occurs simultaneou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/16B01D53/86B01D53/70
CPCB01J31/1691B01D53/86B01D53/8662B01D2257/2064B01D2257/2066B01J35/30Y02C20/30
Inventor 栾奕杨雅楠
Owner 杭州阿德旺斯材料科技有限公司
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