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Ordered short-channel magnetic mesoporous material

A technology of mesoporous materials and short channels, which is applied in the direction of magnetic materials, magnetic objects, electrical components, etc., to achieve the effect of orderly and uniform channels, prevention of exposure and erosion, and large specific surface area.

Inactive Publication Date: 2010-06-23
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the preparation of magnetic mesoporous materials with ordered short channels and uniform particle size has not been reported in the literature so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Ferroferric oxide magnetic beads are prepared by hydrothermal method. Dissolve 7.4g of a mixture of ferrous chloride and ferric chloride with a molar ratio of 1:2 in 2M hydrochloric acid. After passing through nitrogen, add 30ml of ammonia water in a water bath at 40°C under mechanical stirring. The average diameter of the triferromagnetic nanoparticles is (6-16nm).

[0028](2) Under the action of ultrasound, the iron ferric oxide nano-magnetic beads are dispersed in 60ml of absolute ethanol solution, and under stirring in a water bath at 35°C, ethyl tetrasilicate is added, and the mass ratio of ethyl tetrasilicate to the magnetic beads is 5. After reacting for 3 hours, use a magnet to hold the magnetic beads; pour off the supernatant, wash the magnetic beads with absolute ethanol for 2-3 times, then add 50ml of absolute ethanol, and reflux in a water bath at 50°C for 8 hours; The magnet attracts the magnetic beads, pours off the supernatant, and obtains nano-magne...

Embodiment 2

[0034] (1) Ferroferric oxide magnetic beads are prepared by hydrothermal method. Dissolve 10.5 g of a mixture of ferrous chloride and ferric chloride with a molar ratio of 1:2 in 2M hydrochloric acid. After passing through nitrogen, add 60 ml of ammonia water in a water bath at 40°C under mechanical stirring. The average diameter of the triferromagnetic nanoparticles is (6-16nm).

[0035] (2) Under the action of ultrasound, the iron ferric oxide nano-magnetic beads are dispersed in 70ml of absolute ethanol solution, and under stirring in a water bath at 50°C, ethyl tetrasilicate is added, and the mass ratio of ethyl tetrasilicate to the magnetic beads is 2. After reacting for 5 hours, use a magnet to absorb the magnetic beads; pour off the supernatant, wash the magnetic beads with absolute ethanol for 3 times, then add 60ml of absolute ethanol, and reflux in a 70°C water bath for 10 hours; absorb with a magnet Hold the magnetic beads, pour off the supernatant, and get nano-ma...

Embodiment 3

[0040] The obtained magnetic mesoporous material is used as the carrier of isobuprofen medicine.

[0041] Add 5mg of magnetic mesoporous material to a series of concentrations of isobuprofen in 3ml of n-hexane solution, the prepared concentration is as follows: 0.25mg / ml, 0.50mg / ml, 1.00mg / ml, 2.50mg / ml, 5.00mg / ml, 10.00mg / ml, 15mg / ml. Shake at a speed of 200rm for 12 hours, the carrier with the drug adsorbed is sucked by a magnet, and the concentration of the isobuprofen drug in the supernatant is calculated by the external standard method under the ultraviolet absorption of 264nm, and the isobuprofen in the supernatant is subtracted Drug content, and then calculate the adsorption amount of the isobuprofen drug of the magnetic mesoporous material. The resulting adsorption capacity curves are shown in Figure 4 , the maximum adsorption capacity of 5mg magnetic mesoporous material reached 1096.70mg / g.

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Abstract

The invention relates to a magnetic mesoporous material and a preparation method thereof, and the magnetic mesoporous material has ordered short channels, clear appearance and uniform particle size. The method comprises the following steps: in the traditional basic system of synthetic mesoporous materials, adding nano-magnetic particles which are coated with silicon dioxide on the surfaces and take ferroferric oxide as magnetic inner cores, regulating the pH value of a reaction solution, and successfully preparing the magnetic mesoporous material with the ordered short channels and the clear appearance. The magnetic mesoporous material can be applied to bio-separation, drug carriers and chemical catalysis.

Description

technical field [0001] The invention relates to the preparation of an ordered magnetic short-channel mesoporous material, that is, a layer of ordered short-channel mesoporous silicon layer is wrapped on the outer layer of magnetic nanoparticles covered by a silicon film, which can be applied to chemical catalysis, biological separation, and environmental protection. engineering etc. Background technique [0002] Due to the high specific surface area and pore volume of ordered mesoporous materials, uniform and continuously adjustable pore size in the range of 2-50 nm, functionalization of surface groups, good thermal stability and biocompatibility, etc. The characteristics make it quickly become an interdisciplinary research hotspot, and it is increasingly widely used in many fields, such as chemical catalysis, biological separation, environmental protection, drug carrier and synthesis of nanomaterials. In sample pretreatment, magnetic materials have the advantages of rapid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/00B22F1/02
Inventor 邹汉法赵樑吴仁安
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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