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Preparation method of magnetic copper ion imprinting silica gel material

A technology of copper ions and magnetic nanoparticles, which is applied in the field of preparation of copper ion imprinted materials, can solve problems such as poor stability and small specific surface area, achieve good stability, increase specific surface area, and improve ion adsorption and exchange efficiency.

Inactive Publication Date: 2012-11-21
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art preparation of magnetic ion imprinted materials with small specific surface area and poor stability in acidic solutions, and propose a magnetic copper ion imprinted silica gel material that can exist stably in acidic solutions and has a high specific surface area. Preparation

Method used

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  • Preparation method of magnetic copper ion imprinting silica gel material
  • Preparation method of magnetic copper ion imprinting silica gel material
  • Preparation method of magnetic copper ion imprinting silica gel material

Examples

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Embodiment 1

[0023] First, 10g FeCl 3 ·6H 2 0 and 27g of sodium acetate were stirred and dissolved in 411g of ethylene glycol, and the resulting solution was placed in a hydrothermal kettle and reacted for 8h at 200°C; after the reaction, it was cooled to room temperature, and "magnetic separation collection, ethanol washing process" was repeated several times. Black magnetic Fe can be obtained after vacuum drying 3 o 4 Nanoparticles. Subsequently, weigh the 1g Fe prepared by the above steps 3 o 4 Nanoparticles were dispersed in a mixed solution containing 474g ethanol, 800g water, and 9g ammonia water, and 0.3g TEOS was added to the reaction system under stirring at room temperature, vigorously stirred for 6 hours, and then refluxed for 12 hours; Separation and collection, ethanol washing, and deionized water washing process" were repeated three times, and after vacuum drying, brown-black magnetic nanoparticles Fe with a silicon shell coating were obtained. 3 o 4 SiO 2 . Finally,...

Embodiment 2

[0026] First, 20g FeCl 3 ·6H 2 0 and 54g of sodium acetate were stirred and dissolved in 822g of ethylene glycol, and the resulting solution was placed in a hydrothermal kettle and reacted for 8h at 200°C; after the reaction was finished, it was cooled to room temperature, and "magnetic separation collection, ethanol washing process" was repeated several times. Black magnetic Fe can be obtained after vacuum drying 3 o 4 Nanoparticles. Subsequently, weigh 2 g Fe 3 o 4 Nanoparticles were dispersed in a mixed solution containing 948g ethanol, 1600g water and 18g ammonia water, and 0.6g TEOS was added to the reaction system under stirring at room temperature, vigorously stirred for 6 hours, and then refluxed for 6 hours; The collection, ethanol washing, and deionized water washing processes were repeated three times, and after vacuum drying, brown-black magnetic nanoparticles Fe with a silicon shell coating were obtained. 3 o 4 SiO 2 . Finally, put 1gFe in the three-neck ...

Embodiment 3

[0028] First, 5g FeCl 3 ·6H 2 O and 13.5g of sodium acetate were stirred and dissolved in 205.5g of ethylene glycol, and the resulting solution was placed in a hydrothermal kettle and reacted for 8h at 200°C; after the reaction, it was cooled to room temperature, and the "magnetic separation collection, ethanol washing process" was repeated several times. times, black magnetic Fe can be obtained after vacuum drying 3 o 4 Nanoparticles. Subsequently, weigh 0.5 g Fe 3 o 4 Nanoparticles were dispersed in a mixed solution containing 237g ethanol, 400g water and 4.5g ammonia water, and 0.15g TEOS was added into the reaction system under stirring at room temperature, vigorously stirred for 6h, and then refluxed for 12h; Separation and collection, washing with ethanol, and washing with deionized water were repeated three times, and after vacuum drying, brown-black magnetic nanoparticles Fe with a silicon shell coating were obtained. 3 o 4 SiO 2 . Finally, put 1gFe in the thr...

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Abstract

The invention relates to a preparation method of a magnetic copper ion imprinting silica gel material, which comprises the steps of: firstly preparing Fe3O4 nano particles by a hydrothermal method; then preparing magnetic nano particles Fe3O4.SiO2 with a compact silicon shell layer structure by hydrolysis reaction of tetraethoxysilane (TEOS); and finally depositing a porous Cu<2+> ion imprinting silicon gel layer by using Cu<2+> ions as template ions, a nitrogenous silylating reagent (aapts, H2NCH2CH2NHCH2CH2CH2Si(OMe)3) as a functional monomer, cetyl crimethyl ammonium bromide (CTAB) as a porogenic agent, and TEOS as a cross-linking agent on the surface of Fe3O4.SiO2. The agnetic copper ion imprinting silica gel material obtained by the method provided by the invention can enrich Cu<2+> ions quickly and selectively, and has excellent regenerability and acid resistance.

Description

technical field [0001] The invention relates to a preparation method of a copper ion imprinted material, in particular to a preparation method of a magnetic copper ion imprinted silica gel material which can be used for magnetic separation. Background technique [0002] In the field of environment and health, heavy metals mainly refer to elements with significant biological toxicity such as mercury, cadmium, lead, chromium, and arsenic. However, the harm of general heavy metals such as copper, zinc, cobalt, and nickel to the environment cannot be ignored. As smelting, metal processing, machinery manufacturing, organic synthesis and other industries discharge more copper ion-containing wastewater and the accumulation of copper ions will seriously affect the quality of water and soil resources, and ultimately seriously endanger the ecological environment and human life and health. Studies have shown that irrigating farmland with copper-containing wastewater will continue to ac...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/28B01J20/30C02F1/28
Inventor 张腾古宏伟丁发柱屈飞戴少涛
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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