Preparation method for copper ferricyanide/multi-walled carbon nanotube hybrid material with core-shell structure and application of material in adsorption of cesium ions

A technology of multi-walled carbon nanotubes, copper ferricyanide, applied in chemical instruments and methods, ion exchange column/bed methods, nanotechnology for materials and surface science, etc., can solve limited area, small cesium ion distribution coefficient, low cesium ion exchange rate, etc., to achieve the effect of high stability and high removal performance

Inactive Publication Date: 2018-04-20
ZHEJIANG NORMAL UNIVERSITY
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Problems solved by technology

However, pure copper ferricyanide is not an effective ion exchanger for electrochemical control due to the limited area available for cesium ion adsorption. In addition, the poor conductivity of p

Method used

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  • Preparation method for copper ferricyanide/multi-walled carbon nanotube hybrid material with core-shell structure and application of material in adsorption of cesium ions
  • Preparation method for copper ferricyanide/multi-walled carbon nanotube hybrid material with core-shell structure and application of material in adsorption of cesium ions
  • Preparation method for copper ferricyanide/multi-walled carbon nanotube hybrid material with core-shell structure and application of material in adsorption of cesium ions

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[0019] Reagents and materials

[0020]The reagents used include polyvinylpyrrolidone (PVP, molecular weight 40000) purchased from Acros Company, and the laboratory water was purified through the Milli-Q system. Reagent-grade cesium chloride CsCl is used as a substitute for radioactive cesium compounds. Multi-walled carbon nanotubes were purchased from Chengdu Organic Chemicals Co., Ltd. (purity>95%, outer diameter 10-20nm, length 30μm).

[0021] 10 mg of multi-walled carbon nanotubes were ultrasonically dispersed in 30 mL of deionized aqueous solution containing 1 mg of polyvinylpyrrolidone, and the formed multi-walled carbon nanotube dispersion was adjusted to pH=1 with hydrochloric acid, and equimolar amounts (20 mM) of copper ions and Hexacyano and ferrite ion [Fe(CN) 6 ] 3- Add to the above solution in batches, and stir for 30min, then transfer the mixed solution to a polytetrafluoroethylene reactor, conduct a hydrothermal reaction at 180°C for 10h, then cool to room te...

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Abstract

The invention discloses a preparation method for a copper ferricyanide/multi-walled carbon nanotube hybrid material with a dendritic core-shell structure and an application of the material in selective adsorption of cesium ions. The method comprises the following steps: multi-walled carbon nanotubes are dispersed into a deionized water solution containing polyvinylpyrrolidone, the pH of the systemis adjusted to 1-7 by using hydrochloric acid, then copper ions and hexacyanoferrate ions are added into the above solution in batches, uniform mixing is performed under stirring, the mixed liquid istransferred into a hydrothermal reaction kettle, a hydrothermal reaction is performed for 1-24h at the temperature of 100-200 DEG C, then cooling is performed to room temperature, the reaction is stopped, centrifugation collection is performed, washing is performed with water and ethanol, and therefore the copper ferricyanide/multi-walled carbon nanotube hybrid material with the dendritic core-shell structure is obtained. Besides the very high selectivity and removal performance on cesium ions, the copper ferricyanide/multi-walled carbon nanotube hybrid material adsorbing the cerium ions canbe regenerated and shows very high stability in the treatment process of the cerium ions.

Description

technical field [0001] The invention belongs to the technical field of nuclear pollution treatment and synthesis of adsorption materials, and in particular relates to a preparation method of a copper ferricyanide / multi-walled carbon nanotube hybrid material with a dendritic core-shell structure and its use in selective adsorption of cesium ions Applications. Background technique [0002] Atomic fission in nuclear power plants produces cesium-137, the main component of radioactive wastewater. In addition, cesium-137 is a strong source of gamma rays. Due to its long radioactive half-life (30.2 years) and its transferability in the biosphere, cesium-137 will threaten people's health. Radionuclides can be separated and recycled by many methods, including solvent extraction, co-precipitation, chemical adsorption and ion exchange, among which the electrically-switched ion exchange (ESIX) method is a A new cesium ion separation technology, in which the exchange of cesium ions can...

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Application Information

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IPC IPC(8): B01J20/20B01J20/02B01J20/30B01J20/34B01J47/014B01J47/06B01J49/30G21F9/12B82Y30/00
CPCB01J20/0237B01J20/205B01J20/3441B01J47/014B01J47/06B01J49/30B82Y30/00G21F9/12
Inventor 袁军华乔俊华黄晓岚黄璐郑媛媛
Owner ZHEJIANG NORMAL UNIVERSITY
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