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Magnetic covalent organic frame material and preparation method and application thereof

A covalent organic framework, magnetic technology, applied in chemical instruments and methods, inorganic chemistry, other chemical processes, etc., can solve the problems of difficult separation and recovery, poor stability of COFs, etc., to achieve large adsorption capacity, high stability, and equipment. request simple effects

Active Publication Date: 2017-09-15
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of poor stability and difficulty in separation and recovery of existing COFs in application, the present invention provides a novel magnetic covalent organic framework material and its preparation method and application
It has the advantages of good stability, large adsorption capacity, and easy separation from water.

Method used

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  • Magnetic covalent organic frame material and preparation method and application thereof
  • Magnetic covalent organic frame material and preparation method and application thereof
  • Magnetic covalent organic frame material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048]Dissolve the ligand piperazine in tetrahydrofuran at a mass ratio of 1:100, add magnetic iron ferric oxide nanoparticles (1:6 mass ratio to piperazine), and ultrasonically oscillate for 10 minutes, then put the above solution in a mechanically stirred Under normal circumstances, after heating to 80°C, continue to heat and reflux for 30 minutes, so that the system is completely mixed and uniform. Another cyanuric chloride was dissolved in tetrahydrofuran (mass ratio 1:100), and added dropwise to the above-mentioned reflux solution through a constant pressure dropping funnel. After the cyanuric chloride solution is added dropwise (the mass ratio of piperazine to cyanuric chloride is 1.2:1), keep the above system at 80° C. for 5 hours to obtain the crude product. The crude product obtained in the previous step is repeatedly washed with a strong magnet and a mixed solution of ethanol-water until there is no impurity, and then dried in an oven to obtain the final adsorbent. ...

Embodiment 2

[0052] Dissolve the ligand piperazine in carbon tetrachloride at a mass ratio of 1:50, add magnetic iron ferric oxide nanoparticles (1:4 in mass ratio to piperazine), and ultrasonically oscillate for 10 minutes, then put the above solution in After heating to 100°C with mechanical stirring, continue to heat and reflux for 20 minutes, so that the system is completely mixed and uniform. Separately take cyanuric chloride and dissolve it in tetrahydrofuran (mass ratio: 1:50), and add the above-mentioned refluxing solution dropwise through a constant pressure dropping funnel. After the cyanuric chloride solution is added dropwise (the mass ratio of piperazine to cyanuric chloride is 0.5:1), keep the above system at 100°C for 4 hours to obtain the crude product. The crude product obtained in the previous step is repeatedly washed with a strong magnet and a mixed solution of ethanol-water until there is no impurity, and then dried in an oven to obtain the final adsorbent.

[0053] r...

Embodiment 3

[0056] The ligand piperazine was dissolved in tetrahydrofuran at a mass ratio of 1:25, and magnetic iron ferric oxide nanoparticles (1:2 mass ratio to piperazine) were added, and ultrasonically oscillated for 10 minutes, and then the above solution was stirred in a mechanically stirred Under normal circumstances, after heating to 120°C, continue to heat and reflux for 10 minutes, so that the system is completely mixed and uniform. Separately take cyanuric chloride and dissolve it in tetrahydrofuran (mass ratio: 1:25), and add the above-mentioned refluxing solution dropwise through a constant pressure dropping funnel. After the cyanuric chloride solution is added dropwise (the mass ratio of piperazine to cyanuric chloride is 2:1), keep the above system at 120° C. for 3 hours to obtain the crude product. The crude product obtained in the previous step is repeatedly washed with a strong magnet and a mixed solution of ethanol-water until there is no impurity, and then dried in an ...

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Abstract

The invention discloses a magnetic covalent organic frame material and a preparation method and an application thereof. The magnetic covalent organic frame material takes piperazine and cyanuric chloride as the construction units to form a covalent organic frame, and then the covalent organic frame is loaded on the organic frame material formed on the surface of magnetic ferriferrous oxide. The organic frame material better solves the problems of small particle size, poor stability and difficult separating from a water body of the current covalent organic frame materials. The method employs a solvothermal method, and akes the magnetic ferriferrous oxide nano particles as a carrier, the material is immersed into a piperazine-containing ligand solution, a cyanuric chloride ligand solution is dropped, and a hydro-thermal reaction is carried out under constant temperature condition to obtain the magnetic covalent organic frame material. The material has the characteristics of strong separating capability in water, large adsorption quantity on pollutants in the water body, high mechanical strength and environmental friendliness.

Description

technical field [0001] The invention relates to a magnetic covalent organic framework material and its preparation method and application, belonging to the field of synthesis of organic macromolecular materials. Background technique [0002] Covalent Organic Frameworks (COFs) is a crystalline, purely organic, covalently bonded porous material. This type of material has excellent properties, and there is a strong covalent force between the skeletons. At the same time, since this type of material consists of only light elements, it has a low weight density. Due to the characteristics of low density, high chemical stability (high temperature resistance, moisture resistance, acid and alkali resistance), large specific surface area, and easy functionalization, COFs materials are widely used in adsorption, separation, gas capture and storage, and catalysis. , optoelectronic properties, biochemistry and drug loading and other fields have a very broad application prospects. For e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F1/48
CPCB01J20/22C02F1/285C02F1/488B01J20/28009
Inventor 杨朕杨维本王旭增卓宁沈佳淳朱潇逸
Owner NANJING NORMAL UNIVERSITY
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