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Preparation method of aerogel material capable of efficiently absorbing iodide ions and iodide steam

A technology of iodine ion and iodine vapor, which is applied in separation methods, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of difficult collection of iodine ions and iodine molecule adsorption materials, and achieve good adsorption effect, cost, environmental protection and green , the effect of light weight

Inactive Publication Date: 2013-05-22
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing inorganic composite radioactive iodide ion and iodine molecule adsorption materials are difficult to collect and cannot meet the actual needs, and provide a preparation of an airgel material that can efficiently adsorb iodide ions and iodine vapor method

Method used

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  • Preparation method of aerogel material capable of efficiently absorbing iodide ions and iodide steam
  • Preparation method of aerogel material capable of efficiently absorbing iodide ions and iodide steam
  • Preparation method of aerogel material capable of efficiently absorbing iodide ions and iodide steam

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specific Embodiment approach 1

[0029] Specific embodiment 1: The first embodiment of this embodiment is to take an aqueous dispersion of nanofibrillated natural polymer with a mass percentage content of 0.01% to 1.5%;

[0030] 2. Pour the aqueous dispersion of nanofibrillated natural polymer obtained in step 1 into a container and freeze-dry to obtain an ultra-light porous material composed of nanofibrils;

[0031] 3. Add the same volume to the ultra-light porous material obtained in step 2 at a concentration of 5×10 -5 M~5×10 -2 The silver ammonia solution of M is uniformly dispersed under ultrasound and then freeze-dried to obtain Ag-laden + Natural polymer nanofibrils of complexes;

[0032] Fourth, add Ag to the obtained in step three + The natural polymer nanofibers of the complex are added with a NaOH solution of pH=9~11, and the dispersion is uniformly dispersed under ultrasound. The dispersion is aged at room temperature and allowed to stand for 12~48h to obtain natural polymer nanofibers loaded with silver ...

specific Embodiment approach 2

[0044] Specific embodiment two: this embodiment is the same as the specific embodiment one: the ultrasonic treatment described in step two is: ultrasonic treatment is carried out under the condition of ultrasonic power of 400W-2000W for 5min-30min; high-speed shearing treatment is: Shear treatment for 5min~20min under the condition of power 600W~3000W; high pressure homogenization treatment: 5min~30min under pressure of 380~420bar; ball mill pulverization: under the condition of cylinder rotation speed of 500~600rpm The treatment is 5min-20min; the rubber milling treatment is: 5min-30min under the condition of rotating speed of 1500~3500rpm. Others are the same as the first embodiment.

specific Embodiment approach 3

[0045] Specific embodiment three: This embodiment is the same as the specific embodiment one or two in that: the step four described in step four contains Ag + The mass ratio of the natural polymer nanofibrils of the complex to the NaOH solution is 0.05 to 1.2:1. Others are the same as the first or second embodiment.

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Abstract

The invention relates to a preparation method of an aerogel material capable of efficiently absorbing iodide ions and iodide steam, and relates to the preparation method of the aerogel materials. The preparation method of the aerogel material aims to solve the problem that at present, radioactive 129 I and 131 I generated in nuclear fission reaction are hard to catch and control, and easy to diffuse. The prepared material reacts with iodide ions and iodide steam, thereby mainly forming AgI and solidifying I2 monomers. The preparation method of the aerogel material comprises the following steps of 1. preparing natural macromolecular nano-fibril aqueous dispersion; 2. freezing and drying the natural macromolecular nano-fibril aqueous dispersion to form ultralight natural macromolecular nano-fibril porous materials, soaking the porous materials in a silver-ammonia solution, dispersing the porous materials by ultrasonic waves to be loaded with complex containing Ag+, and then freezing and drying the resultant again; 3. then soaking the resultant with thin alkali liquor again, and enabling the complex to react to form silver oxide to obtain nano-fibril loaded with the silver oxide; 4. and cleaning and drying the fibril to obtain the aerogel materials capable of efficiently absorbing iodide ions and iodide steam after being separated. The preparation method is applied in the aspects of nuclear industry, sewage treatment, electronic elements and the like.

Description

Technical field [0001] The invention relates to a method for preparing an aerogel material. Background technique [0002] Silver oxide has a wide range of uses in industry as a cleaning agent, preservative, color developer and electrode material. In recent years, silver oxide has been found to have high catalytic activity and high selectivity when used as a catalyst in organic reactions. In addition, its semiconductor bandwidth is 2.25eV, and it has light-sensitized intermittent fluorescence when excited at a wavelength of 520nm. This feature is suitable for optical recording materials that can be rewritten and erased. More importantly, silver oxide can be used to capture iodine and can form AgI with iodine ions and iodine molecules. The nuclear fission reaction generates radioactivity with a half-life of several days 131 I and half-life is 1.57×10 7 Years of radioactivity 129 I and other radioactive iodine isotopes, due to the small molecular weight of iodine, low boiling poin...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30B01J13/00B01D53/02C02F1/28
Inventor 李坚卢芸孙庆丰刘一星
Owner NORTHEAST FORESTRY UNIVERSITY
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