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Magnetic ordered mesopore composite material, as well as preparation and application thereof

A composite material and mesoporous technology, applied in the field of materials, can solve the problems of few adsorption sites, spherical particle agglomeration, small proportion, etc., and achieve the effect of uniform size

Inactive Publication Date: 2015-02-18
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantage is that Fe 3 o 4 The spherical particle agglomeration phenomenon of MCM-48 composite is serious, and the mesoporous material MCM-48 and the magnetic core Fe 3 o 4 The proportion of is smaller, so that it can provide fewer adsorption sites

Method used

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  • Magnetic ordered mesopore composite material, as well as preparation and application thereof
  • Magnetic ordered mesopore composite material, as well as preparation and application thereof
  • Magnetic ordered mesopore composite material, as well as preparation and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Example 1: CoFe 2 o 4 Preparation of MCM-48 Magnetic Composite Material

[0031] (1) CoFe coated with oleic acid 2 o 4 Synthesis of magnetic nanoparticles: the configured 20mL2mol / L FeCl 3 solution and 20mL of 1mol / L CoCl 2 The solution was mixed and stirred for 30 minutes, then 4 mmol of oleic acid and 16 mL of 3.5 mol / L NaOH solution were added, and the temperature was raised to 80°C under high-speed stirring. Use HCl to adjust the pH of the solution to about 5. After the supernatant and the black precipitate in the lower layer appear, collect the black floc with a magnet, wash with deionized water and absolute ethanol for 3 times, and put it in a 60°C refrigerator. Dry in a vacuum desiccator for 24 hours.

[0032] (2) CTAB stabilized CoFe 2 o 4 Synthesis of magnetic nanoparticles: by the oil-water microemulsion method, take 0.12g of oleic acid-coated cobalt ferrite nanoparticles in 3mL of chloroform, after ultrasonication for 15min, take 1.5mL and add it to 2...

Embodiment 2

[0037] Example 2: The specific implementation steps of this embodiment differ from Example 1 in that the molar ratio of cetyltrimethylammonium bromide to tetraethylorthosilicate is 0.17; others are the same as Example 1.

Embodiment 3

[0038] Example 3: The specific implementation steps of this embodiment differ from Example 1 in that the molar ratio of cetyltrimethylammonium bromide to tetraethylorthosilicate is 0.51; others are the same as Example 1.

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Abstract

The invention discloses a magnetic ordered mesopore composite material, as well as a preparation and application thereof. The preparation method of the material comprises the following steps: modifying the surfaces of cobalt ferrite nano particles with a cationic surfactant, namely hexadecyl trimethyl ammonium bromide (CTAB), uniformly mixing the product with a segmented copolymer, namely EO130PO70EO130 (F108) and CTAB in an alcohol water system, and adding tetraethyl orthosilicate. The composite material is of a spherical microstructure with uniform size under the observation of a transmission electron microscope, and the magnetic nano particles are coated with the inside of MCM-48 silicon dioxide balls; the magnetic ordered mesopore composite material which is synthesized by the method has excellent magnetic property, maintains large specific surface area and pore volume, and can be applied to the field of adsorption, separation, catalysis, information storage, biological medicine, and the like.

Description

technical field [0001] The invention relates to a magnetically ordered mesoporous composite material, its preparation and its application to the adsorption of heavy metal ions such as radionuclides, belonging to the field of materials. Background technique [0002] At present, the pollution of heavy metals to the environment is becoming more and more serious, which in turn has caused great harm to humans, animals and plants. Among them, uranium (Ⅵ) is not only a heavy metal, but also a radionuclide. If uranium exists in the environment, it will seriously threaten the health of the environment and organisms. [0003] In recent years, the research on the combination of magnetic materials and mesoporous materials has attracted the attention of many scholars. Document 1 (Tae-Wan Kim et al. Chemical Materials, 2010, 22, 5093-5104) synthesized ordered mesoporous silica MCM-48 nanomaterials using the improved stober method, but the MCM synthesized by the method of Document 1 The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/28B01J20/30C02F1/28C02F1/62
CPCB01J20/10B01J20/28009B01J20/28019B01J2220/4806C02F1/281C02F2101/20
Inventor 颜学武李云开李兵
Owner NANJING UNIV OF SCI & TECH
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