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A kind of zinc-cobalt Prussian blue analog adsorbent with hollow structure and its preparation method and application

A technology of Prussian blue and analogs, applied in the field of zinc-cobalt Prussian blue analog adsorbents and their preparation, can solve the problems of reducing the effective adsorption area, slow diffusion rate of cesium ions, unfavorable mass transfer by pore structure, etc., and achieves increasing effective adsorption. Area, low cost of raw materials, and the effect of improving the adsorption rate

Active Publication Date: 2021-06-01
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorbents of Prussian blue and its analogues still have the problems of small surface area and poor pore structure for mass transfer, and the adsorption performance needs to be further improved.
Although the smaller size of Prussian blue particles has a large specific surface area, the higher surface energy will cause them to easily agglomerate and reduce the effective adsorption area.
However, the larger-sized Prussian blue particles have limited improvement in adsorption performance due to the slower diffusion rate of cesium ions in the interior.

Method used

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  • A kind of zinc-cobalt Prussian blue analog adsorbent with hollow structure and its preparation method and application
  • A kind of zinc-cobalt Prussian blue analog adsorbent with hollow structure and its preparation method and application
  • A kind of zinc-cobalt Prussian blue analog adsorbent with hollow structure and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]0.72 mmol hexahydrate zinc nitrate and 0.10 g of polyvinylpyrrolidone-K30 ultrasound were dissolved in deionized water, stirred 0.5 h, resulting in solution a; dissolve 0.48 mmol cobalt cyanide ultrasound in deionized water, stirred 0.5 h, resulting in solution B. The solution B was slowly poured into solution A, stirred 0.5 h, and then allowed 20 h, washed with anhydrous ethanol, filtered, and the solid zinc cobalt Blew Blue analog was obtained at 80 ° C.

[0033]The prepared 0.08 G solid zinc cobalt Blus Blue analog and 0.4 g of polyvinylpyrrolidone-K30 (mass ratio of 1: 5) were dispersed in deionized water, stirred 0.5 h, then add 2 m of concentrated hydrochloric acid to make The concentration of hydrochloric acid in the reaction liquid is 1 m, at room temperature (25oC) Continue to stir 1 h, stand 2 H, then washed with ethanol, filtrate, at 80oC is prepared to obtain a hollow zwing Blue.

[0034]A Physical Chemical Characterization of the HMS Blue-like adsorbent is physically ch...

Embodiment 2

[0038]The operating conditions are as in Example 1, where the mass ratio of the solid Prussae blue abstract sample to the polyvinylpyrrolidone-K30 is 1:10. byFigure 6It can be seen that the prepared Prussian blue analog is still hollow spherical morphology.

[0039]It can be seen that compared with solid Luu Shi Blue enumeors, the Mid-Structure of Prussae Blue analog has increased the specific surface area of ​​the material, forming a grading hole structure having micropore-mesoporous-macropores, which is advantageous for cesium ion solutions. Quick spread, exhibiting a faster adsorption rate.

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Abstract

The invention relates to a zinc-cobalt Prussian blue analog adsorbent with a hollow structure and a preparation method and application thereof. The zinc-cobalt Prussian blue analog adsorbent with a hollow structure uses solid zinc-cobalt Prussian blue analog particles as a precursor, Using polyvinylpyrrolidone as a protective agent and hydrochloric acid as an etchant, a zinc-cobalt Prussian blue analogue with a hollow structure was prepared by chemical etching. The method adopted in the present invention is simple and easy, and the cost of raw materials is low. The prepared hollow structure zinc-cobalt Prussian blue analogue adsorbent has a high specific surface area and has a hierarchical pore structure of micropore-mesopore-macropore, which can efficiently and quickly adsorb waste water. radioactive cesium ions.

Description

Technical field[0001]The present invention belongs to the field of adsorbent materials, and more particularly to a hollow structure of zinc cobalt Prussae blue ensembled adsorbent and a preparation method thereof, for adsorbing the radioactive element of the wastewater.Background technique[0002]As one of the alternatives of fossil energy, nuclear energy is undoubtedly a very important energy. Today, approximately 16% of electric energy around the world is provided by nuclear reactors. However, nuclear power plant accident leakage radioactive substance can lead to serious water pollution problems. In 2011, the first nuclear power plant in Fukushima, Japan, due to the Japanese earthquake, the tsunami nuclear leakage accident, the total activity of the leaked radioactive substance was as high as 150,000 billion Becker. Among them, 137 cesium is the main pollutants of radioactive wastewater, and the half-life (about 30 years) is longer, and the global ecological environment and human he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/02B01J20/28C02F1/28B01J20/30
CPCB01J20/0229B01J20/0244B01J20/28078C02F1/281C02F2101/006
Inventor 窦美玲柯绍杰郑瑞杰王峰李珏璇
Owner BEIJING UNIV OF CHEM TECH
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