Covalent organic framework material as well as preparation method and application thereof

A covalent organic framework and organic solvent technology, applied in chemical instruments and methods, other chemical processes, iodine/hydrogen iodide, etc., can solve the problem of long iodine adsorption equilibrium time, achieve fast adsorption speed, strong adsorption capacity, The effect of channel order

Pending Publication Date: 2021-10-15
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problem that the existing covalent organic framework material is only suitable for the adsorption of io

Method used

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  • Covalent organic framework material as well as preparation method and application thereof
  • Covalent organic framework material as well as preparation method and application thereof
  • Covalent organic framework material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: The preparation method of the covalent organic framework material of this embodiment is carried out according to the following steps:

[0030] 1. Weigh 0.14g of 2-(4-aminophenyl)-1H-phenanthrene[9,10-d]imidazole-6,9-diamine and 0.21g of isophthalaldehyde respectively, and add them to the schlenk tube, Then add 1.0mL n-butanol and 0.05mL glacial acetic acid, mix well;

[0031] 2. The schlenk tube is evacuated and nitrogen-filled cycle operation, so that the nitrogen environment in the schlenk tube is maintained;

[0032] 3. Heat the schlenk tube to 115°C and react for 5 days;

[0033] 4. Cool down to room temperature after the reaction, filter with suction, wash the filter cake repeatedly with methanol, and dry in vacuum to obtain a covalent organic framework material with a yield of 78%.

[0034] In this embodiment, the schlenk tube is Shrek

[0035] Structural characterization of the covalent organic framework material in Example 1 was carried out by F...

Embodiment 2

[0058] Embodiment 2: The preparation method of the covalent organic framework material of this embodiment is carried out according to the following steps:

[0059] 1. Weigh 0.14g of 2-(4-aminophenyl)-1H-phenanthrene[9,10-d]imidazole-6,9-diamine and 0.17g of m-phthalaldehyde respectively, and add them to the schlenk tube, Then add 1.0mL N,N-dimethylformamide and 0.05mL concentrated hydrochloric acid with a mass fraction of 37%, and mix well;

[0060] 2. The schlenk tube is evacuated and nitrogen-filled cycle operation, so that the nitrogen environment in the schlenk tube is maintained;

[0061] 3. Heat the schlenk tube to 150°C and react for 3 days;

[0062] 4. Cool down to room temperature after the reaction, filter with suction, wash the filter cake repeatedly with ethyl acetate, and dry in vacuum to obtain a covalent organic framework material, with a yield of 69%.

Embodiment 3

[0063] Embodiment 3: The preparation method of the covalent organic framework material of this embodiment is carried out according to the following steps:

[0064] 1. Weigh 0.14g of 2-(4-aminophenyl)-1H-phenanthrene[9,10-d]imidazole-6,9-diamine and 0.05g of m-phthalaldehyde respectively, and add them to the schlenk tube, Then add 0.5mL N,N-dimethylformamide, 0.5mL dioxane and 0.05mL concentrated sulfuric acid with a mass fraction of 98%, and mix well;

[0065] 2. The schlenk tube is evacuated and nitrogen-filled cycle operation, so that the nitrogen environment in the schlenk tube is maintained;

[0066] 3. Heat the schlenk tube to 130°C and react for 5 days;

[0067] 4. Cool down to room temperature after the reaction, filter with suction, wash the filter cake repeatedly with ethanol, and dry in vacuum to obtain a covalent organic framework material with a yield of 75%.

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Abstract

The invention discloses a covalent organic framework material as well as a preparation method and application thereof, and relates to a covalent organic framework material as well as a preparation method and application thereof. The technical problem that an existing covalent organic framework material is only suitable for iodine vapor adsorption and long in iodine adsorption equilibrium time is solved. The structural unit of the covalent organic framework material is shown in the specification. The covalent organic framework material is obtained by reacting 2-(4-aminophenyl)-1H-phenanthrene [9, 10-d] imidazole-6, 9-diamine with isophthalaldehyde, and the covalent organic framework material is used for adsorbing iodine vapor or iodine in an organic solvent III. The maximum adsorption capacity for iodine vapor can reach 1.69 g.g <-1 >, adsorption equilibrium is achieved in 30 hours, and the removal rate of the iodine vapor is 169 wt%. The adsorption capacity for iodine in a 100 mg/L cyclohexane-iodine solution is 127.80 mg.g <-1 >. The material can be recycled for more than four times. The material can be used in the field of iodine removal.

Description

technical field [0001] The present invention relates to a covalent organic framework material and its preparation method and application. Background technique [0002] Radioactive iodine ( 129 I and 131 1) is a typical radioactive pollutant, which can spread rapidly in the air and is very harmful to human health. The radiation effects of radioactive iodine can last up to 10 million years, of which 129 I has a half-life of 15.7 million years. Therefore, it is of great significance and extremely challenging to study materials that can effectively remove radioactive iodine. Materials such as zeolites, activated carbons, molecular sieves, and metal-organic frameworks (MOFs) have been studied and used for iodine removal, and the design of these materials is mainly based on the channels and specific channel environmental forces. However, the complex and irregular pores of these materials often lead to the blockage of the pore junctions during the adsorption process, and the l...

Claims

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Application Information

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IPC IPC(8): C08G12/28B01J20/26C01B7/14
CPCC08G12/28B01J20/262C01B7/14
Inventor 赵冰郑旺阚伟宋天舒宋波孙立王秀文
Owner QIQIHAR UNIVERSITY
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