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Preparation method of bifunctional Ag20/niobate composite adsorption material and application thereof

A technology of composite adsorption materials and nanocomposites, applied in chemical instruments and methods, other chemical processes, nuclear engineering, etc., can solve problems such as poor ion exchange performance and poor adsorption performance

Inactive Publication Date: 2017-02-15
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Liu Shuaishuai and others prepared three-dimensional Ag 2 O-Ag / TiO 2 Composite materials, which significantly improve the adsorption performance of iodide ions (see Liu shuaishuai et al. in J. Hazard. Mater, 2015, 284:171); Yang Dongjiang et al. use Ag 2 O grains are fixed on the surface of sodium vanadate, and the material exhibits good adsorption performance for iodine, while the crystal structure of vanadate limits its ability to adsorb Sr 2+ Poor ion exchange performance (Yang dongjiang et al. in Nanoscale, 2013,5:11011)
The above-mentioned composite adsorbent material significantly improves the adsorption of iodine, but the adsorption performance of cationic nuclides such as Sr is poor.

Method used

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  • Preparation method of bifunctional Ag20/niobate composite adsorption material and application thereof
  • Preparation method of bifunctional Ag20/niobate composite adsorption material and application thereof
  • Preparation method of bifunctional Ag20/niobate composite adsorption material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Put 8 parts of niobium pentachloride isopropanol solution with a concentration of 0.20mol / L in a polytetrafluoroethylene reactor; add 5 parts of NaOH solution with a concentration of 10mol / L to the above solution, stir for 0.5h, and fully Mix; then put the mixed solution in a polytetrafluoroethylene reactor, seal it and place it in a programmed oven, the heating and cooling rates are 1-2°C / min, and conduct a hydrothermal treatment at a temperature of 180°C for 2 hours. Take out the reactor, Cool to room temperature. Then the reaction products were washed with distilled water until neutral, and dried in an oven at a temperature of 80-100° C. for 48 hours to obtain niobic acid nanomaterials.

Embodiment 2

[0044] Put 8 parts of niobium pentachloride isopropanol solution with a concentration of 0.20mol / L in a polytetrafluoroethylene reactor; add 5 parts of NaOH solution with a concentration of 10mol / L to the above solution, stir for 0.5h, and fully Mix; then put the mixed solution in a polytetrafluoroethylene reactor, seal it and place it in a programmed oven, the heating and cooling rates are 1-2°C / min, and treat it with water at a temperature of 180°C for 2 hours, take out the reactor, and cool to room temperature. Then the reaction products were washed with distilled water until neutral, and dried in an oven at a temperature of 80° C. for 48 hours to obtain niobic acid nanomaterials. Weigh 3 samples of niobic acid nanomaterials, place them in a beaker containing 200mL deionized water, and use 1mol / L NaOH solution to adjust the pH of the solution to 11, and after standing for 24h, filter; the obtained product is placed in a concentration of 200mL In the silver nitrate solution ...

Embodiment 3

[0046] Put 6 parts of niobium pentachloride isopropanol solution with a concentration of 0.25mol / L in a polytetrafluoroethylene reaction kettle, add 3 parts of NaOH solution with a concentration of 11mol / L to the above solution, stir for 1h, and mix thoroughly ; Then put the mixed solution in a polytetrafluoroethylene reactor, seal it and place it in a programmed oven, heat up and cool down at a rate of 1°C / min, and treat it with hydrothermal treatment at a temperature of 170°C for 2 hours, take out the reactor, and cool to room temperature. Then the reaction products were washed with distilled water until neutral, and dried in an oven at a temperature of 80° C. for 24 hours to obtain niobic acid nanomaterials. Weigh 2 samples of niobic acid nanomaterials, place them in a beaker containing 200mL deionized water, and use 1mol / L NaOH solution to adjust the pH of the solution to 10, let it stand for 24h, and filter; the obtained product is placed in a concentration of 200mL In th...

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Abstract

The invention discloses a preparation method of bifunctional Ag20 / niobate composite adsorption material and application thereof. The preparation method is characterized by including the following steps: placing 4-10 parts of tungsten hexachloride ethanol solution with a concentration of 0.15-0.25mol / L in a reaction kettle; adding 1-10 parts of NaOH solution with a concentration of 10mol / L in the tungsten hexachloride solution, and stirring for 0.5-1h; sealing the reaction kettle, and placing the reaction kettle in a program oven for hydrothermal treatment at 150-180 DEG C for 1-4h; taking out the reaction kettle, and cooling to room temperature; washing reaction products respectively with distilled water to make the reaction products be neutral; drying in the oven at 80-100 DEG C for 24-48h to obtain niobate nanomaterials; weighing 1-5 parts of niobic acid samples, adding the niobic acid samples in a beaker containing 200mL deionized water, and adjusting the pH of the solution to 9-11 by NaOH; still standing for 24h, and filtering to obtain a product; placing the product in 200mL of silver nitrate solution with a concentration of 0.002-0.004mol / L, and continuously stirring for 12-24h; filtering the solution, and drying the solid sample in the oven of 80-100 DEG C for 24-48h to obtain the Ag20 / niobate nanocomposite.

Description

technical field [0001] The present invention relates to a bifunctional Ag 2 The invention discloses a method for preparing a 0 / niobic acid composite adsorption material, which belongs to the field of preparation of inorganic functional materials. Background technique [0002] There are a large number of valuable anion and cation fission nuclides in high-level waste liquid, such as ions in the form of 90 Sr is not only one of the main heat-releasing elements of high-level waste liquid, but also a very important fission isotope. It is an important raw material for isotope batteries and permanent luminescent materials. Alternate role, or prepared as 90 Sr- 90 The Y generator satisfies the clinical 90 Y's needs. The iodine isotope exists as an anion such as 129 I. 131 I and 125 I has a high fission yield and is widely used in medical treatment and environmental monitoring, among which the longest life 129 I has attracted much attention, and its half-life is as long as 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/30G21F9/12
CPCB01J20/0214B01J20/06G21F9/12
Inventor 牟婉君余钱红蹇源张锐李兴亮马宗平魏洪源刘国平钟文彬陈淇萍谢翔唐惠周官宏
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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