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A kind of covalent organic framework and ionic liquid composite material and its preparation method and application

A technology of covalent organic frameworks and ionic liquids, applied in separation methods, chemical instruments and methods, and other chemical processes, can solve problems such as short service life of adsorbents, difficulties in preparing covalent organic frameworks, and unstable composite systems. Achieve the effect of improving service life, good adsorption performance and firm combination

Active Publication Date: 2021-08-10
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is very meaningful to prepare a carbon dioxide adsorbent with high adsorption efficiency by combining ionic liquids with covalent organic frameworks. , which makes the composite system unstable and the service life of the adsorbent is short

Method used

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  • A kind of covalent organic framework and ionic liquid composite material and its preparation method and application
  • A kind of covalent organic framework and ionic liquid composite material and its preparation method and application
  • A kind of covalent organic framework and ionic liquid composite material and its preparation method and application

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Effect test

Embodiment 1

[0036] A covalent organic framework and ionic liquid composite material for carbon dioxide adsorption, the preparation method comprising the following steps:

[0037] Preparation of covalent organic framework materials: Weigh 48mg of trimesaldehyde and 48mg of 1,4-diaminobenzene and dissolve in 3.0mL of 1,4-dioxane, transfer the resulting mixture to a glass ampoule, Add 0.6 mL of 3 mol / L acetic acid aqueous solution to the mixture, then place the glass ampoule in liquid nitrogen for rapid freezing, and seal the tube with a vacuum flame gun. After the glass ampoule is heated to room temperature, put it in an oven at 120°C for reaction, take it out after 3 days, open the glass ampoule above 40°C, wash with DMF and THF three times, centrifuge, and dry in a vacuum oven at 80°C for 12 hours to obtain 72 mg of yellow Covalent organic framework material (COF-LZU1);

[0038] Reduction of covalent organic framework materials: Weigh 72 mg of covalent organic framework materials prepare...

Embodiment 2

[0046] A covalent organic framework and ionic liquid composite material for carbon dioxide adsorption, the preparation method comprising the following steps:

[0047] Preparation of covalent organic framework materials: Weigh 48mg of trimesaldehyde and 48mg of 1,4-diaminobenzene and dissolve in 3.0mL of 1,4-dioxane, transfer the resulting mixture to a glass ampoule, Add 0.6 mL of acetic acid aqueous solution with a concentration of 6 mol / L to the mixture, then quickly freeze the glass ampoule in a liquid nitrogen bath, and seal the tube with a vacuum flame gun. After the glass ampoule is heated to room temperature, put it in an oven at 120°C for reaction, take it out after 3 days, open the glass ampoule above 40°C, wash with DMF and THF three times, centrifuge, and dry in a vacuum oven at 80°C for 12 hours to obtain 72 mg of yellow Covalent organic framework materials;

[0048] Reduction of covalent organic frameworks: Weigh 72 mg of the covalent organic framework materials p...

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Abstract

The present invention relates to a covalent organic framework and ionic liquid composite material and its preparation method and application, which is prepared by the following methods: 1. preparation of covalent organic framework material; 2. reduction of covalent organic framework material; 3. Preparation of ionic liquid; 4. Preparation of covalent organic framework and ionic liquid composite material: add the reduced covalent organic framework material into methanol, disperse evenly, and add potassium carbonate solution to it, react at 50-70°C for 0.5h, Then, the ionic liquid is dissolved in a small amount of water to make a solution and then added, and the reaction is continued at 50-70° C. for 24 hours, and finally post-treated to obtain the composite material of the covalent organic framework and the ionic liquid. The covalent organic framework and ionic liquid composite material provided by the invention has good carbon dioxide adsorption performance, and is expected to be popularized and applied as a high-efficiency adsorbent for industrial carbon dioxide.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a covalent organic framework and ionic liquid composite material used as a carbon dioxide adsorbent, a preparation method and application thereof. Background technique [0002] With the development of society, people's use of fossil fuels has greatly increased, which inevitably produces a large amount of carbon dioxide, and carbon dioxide is one of the main gases that cause the greenhouse effect. In December 2015, the "Paris Agreement" was adopted at the Paris Climate Change Conference. Its purpose is to reduce greenhouse gas emissions. At present, scientists from all over the world are actively working hard to overcome the international problem of greenhouse gas emissions. At present, the relatively mature method for carbon dioxide adsorption is the alcohol amine adsorption method, which uses alcohol amine as a liquid phase adsorbent to adsorb carbon dio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30B01D53/02
CPCY02C20/40
Inventor 张海宁于佳琳
Owner WUHAN UNIV OF TECH