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Imidazole functionalized magnetic meso-porous silicon as well as preparation method and application thereof

A mesoporous silicon, functionalized technology, applied in chemical instruments and methods, inorganic chemistry, radioactive purification, etc., can solve the problems of difficult recycling and reuse, achieve strong magnetic response intensity, high specific surface, and promote selective adsorption Effect

Active Publication Date: 2015-01-14
INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Mesoporous materials in the prior art are difficult to recycle and reuse as radionuclide adsorbents

Method used

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  • Imidazole functionalized magnetic meso-porous silicon as well as preparation method and application thereof
  • Imidazole functionalized magnetic meso-porous silicon as well as preparation method and application thereof
  • Imidazole functionalized magnetic meso-porous silicon as well as preparation method and application thereof

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preparation example Construction

[0027] The invention provides a method for preparing imidazole functionalized magnetic mesoporous silicon, comprising the following steps:

[0028] (1) Using magnetic iron ferric oxide nanoparticles as the core, using a sol-gel method, using a silicon source precursor to hydrolyze, and coating a layer of amorphous silicon dioxide on the surface of the magnetic iron ferric oxide nanoparticles;

[0029] (2) reusing the sol-gel method to self-assemble a layer of composite shell on the surface of magnetic nanoparticles wrapped with amorphous silicon to obtain magnetic mesoporous silicon; the composite shell is composed of surfactant and silicon dioxide;

[0030] (3) calcining the magnetic mesoporous silicon, removing the surfactant in the magnetic mesoporous silicon, and obtaining a spherical magnetic composite material with mesoporous silicon dioxide as the shell;

[0031] (4) Finally, the spherical magnetic composite material is grafted with imidazole functional groups by a post...

Embodiment 1

[0048] (1) Disperse 0.10 g of magnetic ferric iron tetroxide of about 300 nm synthesized by solvothermal method into 50 ml of 0.1 mol / L HCl solution, ultrasonicate for 10 minutes, the magnetic particles are dispersed, washed with deionized water, and dispersed to the 80ml of ethanol, 20ml of deionized water and 1.0ml of mixed solution with a mass fraction of 28% ammonia, then dropwise added 0.03g of tetraethyl orthosilicate, stirred at room temperature for 6 hours, and the obtained product was washed with ethanol and water.

[0049] (2) the product obtained in step (1) is dispersed into containing 60ml ethanol, 80ml deionized water, 1.00g mass fraction is in the mixed solution of 28% ammoniacal liquor and 0.30g cetyltrimethylammonium bromide, After mechanically stirring for 30 minutes to make the solution uniform, slowly add 0.4 g of tetraethyl orthosilicate dropwise, continue mechanically stirring for 6 hours after the dropwise addition, collect the product with a magnet, and ...

Embodiment 2

[0053] (1) Disperse 0.12 g of magnetic ferric iron tetroxide of about 500 nm synthesized by solvothermal method into 50 ml of 0.1 mol / L HCl solution, ultrasonically 10 minutes, the magnetic particles are dispersed, washed with deionized water, and dispersed to the 90ml of ethanol, 10ml of deionized water and 1.0ml of mixed solution with a mass fraction of 28% ammonia, then dropwise added 0.05g of methyl orthosilicate, stirred at room temperature for 6 hours, and the obtained product was washed with ethanol and water.

[0054] (2) The product obtained in step (1) is dispersed into containing 90ml ethanol, 60ml deionized water, 1.00g mass fraction is the ammoniacal liquor of 28%, and in the mixed solution of 0.35g octadecyltrimethylammonium bromide After mechanical stirring for 30 minutes to make the solution uniform, slowly add 0.5 g of ethyl orthosilicate dropwise, continue mechanical stirring for 6 hours after the dropwise addition, collect the product with a magnet, and wash ...

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Abstract

The invention discloses imidazole functionalized magnetic meso-porous silicon as well as a preparation method and application thereof. The method comprises the following steps: (1) coating the surface of magnetic ferroferric oxide nano particles with a layer of amorphous silicon dioxide by utilizing a sol-gel method; (2) assembling a layer of composite shell on the surfaces of the magnetic nano particles which are coated by the amorphous silicon by utilizing the sol-gel method; (3) calcining the magnetic meso-porous silicon to obtain a spherical magnetic composite material adopting the meso-porous structural silicon dioxide as a shell; and (4) grafting an imidazole functional group by utilizing a grafting method to obtain the imidazole functionalized magnetic meso-porous silicon. The invention also provides application of the imidazole functionalized magnetic meso-porous silicon on the aspects of radioactive nuclide adsorption and separation. The functionalized magnetic meso-porous silicon composite material has the advantages of a magnetic material, and also maintains the advantages of a meso-porous silicon material.

Description

technical field [0001] The invention belongs to the technical field of adsorption and separation of nanomaterials and radionuclides, and in particular relates to an imidazole-functionalized magnetic mesoporous silicon and its preparation method and application. Background technique [0002] In recent years, the consumption of traditional energy has accelerated, and the problem of climate change has become increasingly prominent. The development of nuclear energy for civil use in the world is imperative. With the continuous development of nuclear energy, the treatment of radioactive wastewater has been paid more and more attention by various countries. In terms of research on the treatment of uranium-containing wastewater, the new separation and enrichment technologies developed in recent years mainly include flotation, capillary electrophoresis, adsorption separation and extraction. Among these four methods, adsorption separation has its irreplaceable advantages: simple ope...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30G21F9/12
CPCB01J20/0229B01J20/06B01J20/103B01J20/22B01J20/28009B01J20/28021B01J2220/46B01J2220/4806G21F9/12
Inventor 石伟群朱琳袁立永王琳
Owner INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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