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Gaseous iodine adsorption material with foamed nickel as framework as well as preparation method and application thereof

A foam nickel, iodine adsorption technology, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve the problem of insufficient adsorption, the risk of iodine migration, and the serious physical adsorption of iodine adsorption materials. and other problems, to achieve the effect of improving adsorption capacity and simple preparation method

Active Publication Date: 2021-06-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problems of insufficient adsorption capacity and risk of iodine migration in the gaseous iodine adsorption material in the prior art, and provide a kind with abundant active sites, with nickel foam as the skeleton, high adsorption capacity for gaseous iodine and almost Iodine sorbent material that does not contain physisorb
The material has stable performance and can solve the problem of serious physical adsorption of existing iodine adsorption materials

Method used

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  • Gaseous iodine adsorption material with foamed nickel as framework as well as preparation method and application thereof
  • Gaseous iodine adsorption material with foamed nickel as framework as well as preparation method and application thereof
  • Gaseous iodine adsorption material with foamed nickel as framework as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of adsorption material with nickel foam as the skeleton and bismuth as the active site:

[0043] (1) Cutting preparation of nickel foam: Cut the purchased nickel foam with a thickness of 0.5mm to 2.5×2cm 2 size, washed with ethanol ultrasonically and dried;

[0044] (2) Configuration of bismuth salt solution: Weigh 0.7275g of bismuth nitrate pentahydrate, dissolve in the mixed solution of ethanol and ethylene glycol (the volume ratio of ethanol to ethylene glycol is 1:1, each is 7.5mL), stir 30min;

[0045] (3) Solvothermal reaction: the nickel foam obtained in step (1) and the bismuth salt solution obtained in step (2) are placed in a 25ml reaction kettle together, and after standing for half an hour, react at 200°C for 12h;

[0046] (4) After the reaction is finished and the reaction is naturally lowered to room temperature, it is taken out with tweezers and washed several times, and dried to obtain the iodine adsorption material with nickel foam as the ...

Embodiment 2

[0049] This embodiment is an iodine adsorption material with nickel foam as the skeleton and silver as the active site. Compared with Example 1, except that the bismuth nitrate pentahydrate in step (2) is replaced by 0.7275g silver nitrate, other steps unchanged, an iodine adsorption material with nickel foam as the skeleton and silver active sites was obtained.

[0050] The adsorption material of embodiment 2 is characterized, and XRD collection of lines is as follows figure 2 As shown, all the diffraction peaks can be attributed to the simple substance of silver (PDF No.04-0783) and the nickel substance of the nickel foam framework (PDF No.04-0850), indicating that under the solvothermal reaction, the silver ions are all reduced to Silver is single substance and successfully loaded onto the nickel framework. Optical microscopy results such as Figure 4 As shown, it can be seen that a layer of silver particles has been firmly wrapped on the surface of the nickel foam, form...

Embodiment 3

[0052] According to the preparation process of Example 1, the solvent in step (2) was replaced with a mixed solution with a volume ratio of ethanol and ethylene glycol of 1:2 and 2:1, respectively, to prepare an adsorption material whose active site was bismuth.

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Abstract

The invention relates to the technical field of spent fuel post-treatment, and discloses a gaseous iodine adsorption material taking foamed nickel as a framework and a preparation method and application thereof. The preparation method comprises the following steps: putting foamed nickel into a solution containing bismuth salt or silver salt, carrying out solvothermal reaction, taking out the foamed nickel, and washing and drying to obtain the gaseous iodine adsorption material. The foamed nickel is used as a framework, the metal bismuth or silver wraps the surface of nickel through solvothermal reaction, abundant active sites are provided for adsorption of gaseous iodine, and the adsorption capacity of the adsorption material is greatly improved. And the adopted foamed nickel does not contain a microporous structure, so that the gaseous iodine cannot be physically adsorbed, the prepared adsorption material captures the gaseous iodine by virtue of the chemical adsorption effect of bismuth or silver, the risk of iodine migration is not easy to occur in the later period, and the defects of a porous adsorption material in the prior art are overcome.

Description

technical field [0001] The invention relates to the technical field of spent fuel reprocessing, in particular to a gaseous iodine adsorption material with nickel foam as a skeleton and a preparation method and application thereof. Background technique [0002] Nuclear energy is one of the most promising future energy sources for human beings. Compared with traditional fossil energy sources, nuclear energy will not cause air pollution or greenhouse effect during the production process. It is an ideal clean energy source. But how to deal with the spent fuel after burning has always been a headache. In the development of nuclear energy in our country, we have always adhered to the closed-cycle policy to reprocess spent fuel, so a large amount of radioactive waste gas will inevitably be produced. Radioactive gaseous iodine (I-129, I-131) is one of them. Because it has strong radiotoxicity and is extremely volatile, it is easy to migrate in the environment and cause harm, so it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/28B01J20/30G21F9/04
CPCB01J20/02B01J20/28045G21F9/04
Inventor 肖成梁田振江
Owner ZHEJIANG UNIV
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