Modification method for effectively improving MOFs water stability and ammonia gas adsorption performance

A technology of water stability and adsorption performance, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of water stability hindering HKUST-1, crystal structure damage, skeleton collapse, etc.

Active Publication Date: 2019-11-19
BEIJING UNIV OF TECH
View PDF2 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although MOFs have many advantages, some are easy to absorb water and cause the collapse of the skeleton, such as HKUST-1, resulting in the destruc

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Modification method for effectively improving MOFs water stability and ammonia gas adsorption performance
  • Modification method for effectively improving MOFs water stability and ammonia gas adsorption performance
  • Modification method for effectively improving MOFs water stability and ammonia gas adsorption performance

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Example 1:

[0024] Weigh out 0.135g of HKUST-1 pellets, place them in a 50mL three-necked flask, and add a mixed monomer solution of 0.359g (3.45mmol) of styrene and 0.162g (1.88mmol) of methacrylic acid, and then add 4mL to dissolve 0.02g (0.12mmol) Azobisisobutyronitrile in tetrahydrofuran, placed at room temperature and magnetically stirred for 18-24h. After the stirring is completed, put it in an oil bath at 60-70°C to react for 6-8 hours. After the reaction stopped, centrifuged and removed the supernatant. The obtained solid was washed three times with 2-6 ml of tetrahydrofuran and acetone, and the supernatant was removed by centrifugation each time. Place the cleaned product to dry naturally at room temperature, and after it is fully dried, move it into a vacuum drying oven at 50°C for 24 hours. Finally, a (polystyrene-co-polymethacrylic acid) / HKUST-1 composite material is obtained.

[0025] Weigh 0.1g of the composite material, put it into a glass tube with an in...

Example Embodiment

[0026] Example 2:

[0027] Weigh 0.135g of HKUST-1 pellets, place them in a 50mL three-necked flask, and add a mixed monomer solution of 0.359g (3.45mmol) of styrene and 0.184g (1.88mmol) of maleic anhydride, and then add 4mL to dissolve 0.02g (0.12mmol) Azobisisobutyronitrile in tetrahydrofuran, placed at room temperature and magnetically stirred for 18-24h. After the stirring is completed, put it in an oil bath at 60-70°C to react for 6-8 hours. After the reaction stopped, centrifuged and removed the supernatant. The obtained solid was washed three times with 2-6 ml of tetrahydrofuran and acetone, and the supernatant was removed by centrifugation each time. Place the cleaned product to dry naturally at room temperature, and after it is fully dried, move it into a vacuum drying oven at 50°C for 24 hours. Finally, a composite of polystyrene-co-polymaleic anhydride) / HKUST-1 was obtained.

[0028] Weigh 0.1g of the composite material, put it into a 0.5cm inner diameter glass tube...

Example Embodiment

[0029] Example 3:

[0030] Weigh 0.135g of HKUST-1 pellets, place them in a 50mL three-necked flask, add 0.555g (5.34mmol) of styrene monomer solution, and then add 4mL of tetrahydrofuran with 0.02g (0.12mmol) of azobisisobutyronitrile dissolved in it , Placed at room temperature and magnetically stirred for 18-24h. After the stirring is completed, put it in an oil bath at 60-70°C to react for 6-8 hours. After the reaction stopped, centrifuged and removed the supernatant. The obtained solid was washed three times with 2-6 ml of tetrahydrofuran and acetone, and the supernatant was removed by centrifugation each time. Place the cleaned product to dry naturally at room temperature, and after it is fully dried, move it into a vacuum drying oven at 50°C for 24 hours. Finally, a polystyrene / HKUST-1 composite material is obtained.

[0031] Weigh 0.1g of the composite material, put it into a 0.5cm inner diameter glass tube, heat it at 120℃ for 12h at a nitrogen flow rate of 15mL / min, t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a modification method for effectively improving MOFs water stability, and belongs to the technical field of organic-inorganic porous composite materials. The method concretelyrelates to the use of a metal organic skeletal material MOFs as an inorganic phase and the use of a high specific surface and an internal pore structure of the MOFs. Monomers of an organic phase, suchas styrene, methacrylic acid and other olefin monomers, are introduced into the pore structure of the MOFs, and the monomers are induced to undergo free radical copolymerization in pores of a metal organic framework, thereby modifying a skeleton of the MOFs and improving the water stability. The free radical copolymerization is simple in reaction conditions and easy in implement. When the methodis applied to post-synthesis modification of the MOFs, the structure is not destroyed, and the water stability of the MOFs is improved. The MOFs has the absorption performance of ammonia, can be regenerated at high temperature to a certain extent, and can ensure the stability of a composite material in ammonia adsorption penetration.

Description

technical field [0001] The invention enhances the water stability of metal-organic framework materials through in-situ free radical copolymerization, and the composite material obtained after copolymerization in harmful gases such as ammonia gas, belongs to the technical field of organic-inorganic porous composite materials. Background technique [0002] Metal-organic frameworks (Metal-Organic Frameworks, MOFs) have the characteristics of ultra-high specific surface area, controllable pore size and adjustable chemical environment, and can be used in air purification, water environment treatment, gas storage and chemical sensing, etc. It shows a very good application prospect. As a typical MOFs material, HKUST-1 is formed by coordination self-assembly of copper salt and trimesic acid. Its crystal structure is similar to a paddle wheel, and each Cu ion is axially combined with a water molecule, which is easy to be removed to obtain a vacant metal active site, so that it exhib...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08F292/00C08F212/08C08F220/06C08F222/06B01J20/22B01J20/30B01D53/02
CPCC08F292/00B01J20/226B01J20/261B01D53/02B01D2253/204B01D2257/406C08F212/08
Inventor 赵敏坚王思南王彬谢林华李建荣
Owner BEIJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap