Preparation of hydrazone porous covalent organic framework material containing amino functional group and gaseous iodine adsorption application

A covalent organic framework, amino-functional technology, applied in separation methods, other chemical processes, dispersed particle separation, etc., can solve the problems of long synthesis cycle, complex process, difficult to maintain crystallinity, etc., to achieve convenient reaction cycle, specific surface area and other problems. High and stable effect

Pending Publication Date: 2022-03-11
广东朗斯姆生化技术有限公司 +1
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Problems solved by technology

At present, the common strategies for constructing amino-functionalized COF materials include the following: The first strategy is to use the monomer exchange method to prepare amino-functionalized COFs, but this strategy has a long synthesis period, complicated process, and reduces the monomer Crystallinity of COF after exchange
The second strategy is to reduce the nitro-functionalized COF through a post-modification method to make it an amino-functionalized COF material. This strategy also has problems such as complex synthesis steps and difficulty in maintaining crystallinity.
However, since the reactivity of the four amino groups of the tetraamine monomer is the same, the formation of the target COF will also be accompanied by the formation of other by-products

Method used

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  • Preparation of hydrazone porous covalent organic framework material containing amino functional group and gaseous iodine adsorption application
  • Preparation of hydrazone porous covalent organic framework material containing amino functional group and gaseous iodine adsorption application
  • Preparation of hydrazone porous covalent organic framework material containing amino functional group and gaseous iodine adsorption application

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Embodiment 1

[0038] Example 1 Preparation of Hydrazone Porous Covalent Organic Framework Materials Containing Amino Functional Groups

[0039] Such as figure 1 As shown in the synthetic route diagram of the present embodiment, the preparation method of the hydrazone-type porous covalent organic framework material containing amino functional groups specifically includes the following steps:

[0040] (1) 2,4,6-(4-formylphenyl)-1,3,5-triazine (Tz, 7.87mg, 0.02mmol), amino functionalized dihydrazide monomer (NH 2 -Th, 6.3mg, 0.03mmol) and 1.0mL of mesitylene / dioxane mixed solvent (the volume ratio of mesitylene and dioxane is 1:1) were placed in a 10mL pressure-resistant reaction flask, Mix well and add 0.1mL of 6M acetic acid solution.

[0041] (2) Bubble the pressure-resistant reaction vial with argon gas for 10 minutes, then quickly seal it, and then place the pressure-resistant reaction vial in an oven at 110° C. for three days.

[0042] (3) Cool to room temperature after the reaction, co...

experiment example 1

[0043] Experimental example 1 Determination of properties of amino functionalized hydrazone covalent organic framework materials

[0044] The hydrazone porous covalent organic framework material containing amino functional groups prepared in Example 1 (NH 2 -Th-TzCOF) was used as the test material, and its performance was measured.

[0045] (1) X-ray powder diffraction measurement

[0046] NH was measured at room temperature using a Japanese Science Ultima IV X-ray powder diffractometer 2 -Powder X-ray Diffraction Spectrum of Th-Tz COF, measured by Cu Kα radiation, 2θ in the range of 2°-40°, current of 40mA, voltage of 30kV.

[0047] Measurement results such as figure 2 As shown, 2.3°, 4.8°, 6.2° and 8.1° in the figure are NH 2 -Characteristic diffraction peaks of Th-Tz COF, indicating that it has good crystallinity.

[0048] (2) Fourier transform infrared spectroscopy (FT-IR) measurement

[0049] Using the Spectrum Two FT-IR spectrometer from PerkinElmer, Germany 2 - ...

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Abstract

The invention belongs to the technical field of covalent organic framework functional materials, particularly relates to preparation of a hydrazone porous covalent organic framework material containing an amino functional group and application of gaseous iodine adsorption, and aims to develop an amino functional material with efficient iodine adsorption performance. The preparation method comprises the following steps: firstly designing and synthesizing an amino-functionalized dihydrazide monomer containing functional groups with different reaction activities, and then carrying out acetic acid catalytic reaction on the amino-functionalized dihydrazide monomer and 2, 4, 6-(4-formyl phenyl)-1, 3, 5-triazine in an organic solvent under the protection effect of inert gas to obtain the porous hydrazone covalent organic framework material containing the amino functional groups. On one hand, the synthesis method has the advantages of simplicity, convenience, short reaction period and the like; and on the other hand, the synthesized hydrazone porous covalent organic framework material contains rich amino functional sites, has the advantages of good crystallinity, high specific surface area, high stability and the like, and can be used as an adsorption material for effective adsorption of gaseous iodine.

Description

technical field [0001] The invention belongs to the technical field of covalent organic framework functional materials, and in particular relates to the preparation of a hydrazone-type porous covalent organic framework material containing amino functional groups and the application of gaseous iodine adsorption. Background technique [0002] Nuclear energy is one of the most promising clean energy sources for the future of mankind. However, with the continuous development of the nuclear industry, the generation of nuclear waste is also increasing. In addition, spent fuel contains a large amount of raw material uranium and a large amount of solid or gaseous radioactive elements produced by fission. If it is not recycled and processed, it will cause serious harm to the ecological environment and human health. Compared with solid radioactive waste, gaseous radioactive waste has great fluidity and is easy to migrate with the air flow, so its polluted area is larger and the harm ...

Claims

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Application Information

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IPC IPC(8): C08G12/22C08G12/04B01J20/22B01J20/30B01D53/02
CPCC08G12/22C08G12/04B01J20/226B01D53/02B01J2220/4812B01D2253/204
Inventor 蔡松亮汤西豪张舒媛章伟光郑盛润范军吴佳琳
Owner 广东朗斯姆生化技术有限公司
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