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Porous metal organic framework compound and application thereof in adsorbing radioactive gas

A technology of organic framework and porous metal, applied in the direction of radioactive purification, other chemical processes, chemical instruments and methods, etc., can solve the problems of limited removal depth and adsorption capacity

Pending Publication Date: 2020-08-04
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, it is necessary to address the limited removal depth and adsorption capacity of activated carbon for radioactive gases, and

Method used

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  • Porous metal organic framework compound and application thereof in adsorbing radioactive gas
  • Porous metal organic framework compound and application thereof in adsorbing radioactive gas
  • Porous metal organic framework compound and application thereof in adsorbing radioactive gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of a porous metal-organic framework compound, comprising the steps of:

[0030] 0.56mmol of zinc nitrate hexahydrate (Zn(NO 3 ) 2 ·6H 2 O), 0.565 mmol of benzimidazole (H-PhIM) and 1.125 mmol of imidazole (IM) were dissolved in 15 mL of N,N-dimethylformamide (DMF), added to a 20 mL scintillation vial and lined with Teflon Sealed, heated at 100 °C for 72 hours, cooled the above reaction solution to room temperature under natural conditions, stood still, removed the supernatant to collect the solid product, washed three times with DMF and ethanol each, and dried in a vacuum oven at 60 °C After 12 hours, a porous metal organic framework compound was obtained, and the compound was named ZIF-7SCW. The resulting material was activated by solvent ligand exchange by soaking it in fresh methanol for three days (3 times / day) prior to gas adsorption.

Embodiment 2

[0032] A preparation method of a porous metal-organic framework compound, comprising the steps of:

[0033] 0.56mmol of zinc nitrate hexahydrate (Zn(NO 3 ) 2 ·6H 2 O), 0.565 mmol of benzimidazole (H-PhIM) and 0.113 mmol of imidazole (IM) were dissolved in 15 mL of N,N-dimethylformamide (DMF), added to a 20 mL scintillation vial and lined with Teflon Sealed, heated at 100 °C for 72 hours, cooled the above reaction solution to room temperature under natural conditions, stood still, removed the supernatant to collect the solid product, washed three times with DMF and ethanol each, and dried in a vacuum oven at 60 °C After 12 hours, a porous metal organic framework compound was obtained, and the compound was named ZIF-7SCW-2. The resulting material was activated by solvent ligand exchange by soaking it in fresh methanol for three days (3 times / day) prior to gas adsorption.

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Abstract

The invention relates to a porous metal organic framework compound and application thereof in adsorbing a radioactive gas. The preparation method of the porous metal organic framework compound comprises the following steps: mixing zinc nitrate hexahydrate, an imidazole organic ligand and an N, N-dimethylformamide solvent to obtain a mixed solution, wherein the imidazole organic ligand is a mixtureof benzimidazole and imidazole, and the molar ratio of benzimidazole to imidazole is (1: 3)-(5: 1); and performing heating treatment on the mixed solution to obtain the porous metal organic frameworkcompound, wherein the temperature of heating treatment is 60-100 DEG C, and the time of heating treatment is 60-84 h. The porous metal organic framework compound prepared by the method has an efficient and specific adsorption effect on the radioactive gas (especially radon gas).

Description

technical field [0001] The invention relates to the field of radioactive gas adsorption and removal, in particular to a porous metal organic framework compound and its application in adsorbing radioactive gas. Background technique [0002] As the main source of radiation for human beings, natural radiation has no essential difference in damage to human health compared with artificial radiation. Therefore, from the perspective of public health, research, evaluation and control of natural radiation have reached a consensus in the international radiation protection community. [0003] Radioactive gases (222Rn, 133Xe, etc.) will cause serious pollution to the environment, endanger ecological safety and human health, and the most important contributor to human natural radiation - radioactive radon ( 222 Rn) as an example, the half-life of radon is 3.825 days, it is a colorless and odorless rare gas, it will form a series of radioactive daughters in the process of decay, includin...

Claims

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Application Information

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IPC IPC(8): C08G83/00B01J20/22B01J20/30
CPCB01J20/226C08G83/008G21F9/02
Inventor 王殳凹马付银汪遐罗诗慧袁梦嘉
Owner SUZHOU UNIV
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