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Hydrothermal preparation method and application of magnetic ferroferric oxide nanochain

A technology of ferric tetroxide and nano-chain, applied in the field of nano-materials, can solve the problems of surface modification of unfavorable materials, large irritation of tetrahydrofuran, large particle size of nano-crystal clusters, etc., achieves good potential application prospects, novel and simple preparation method, good repeatability

Inactive Publication Date: 2013-08-28
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method combines self-assembly and in-situ template method to prepare magnetic Fe3O4 nanochains. Firstly, superparamagnetic Fe3O4 nanocrystal clusters (diameter of 194.9±10.8nm) with positive charges on the surface are prepared, and then One-dimensional nanochains were obtained by adding surface modification ultrasonic reaction. Although the preparation method of magnetic nanochains was optimized to a certain extent and its biocompatibility was improved, the size of nanocrystal clusters prepared by this method was large, which was not conducive to the development of materials. Further surface modification, and the reagents hexachlorocyclotriphosphazene and tetrahydrofuran are more irritating, the operation process is relatively complicated, there are many influencing factors, and the preparation cost is high, which limits the practical application of nanochains

Method used

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  • Hydrothermal preparation method and application of magnetic ferroferric oxide nanochain

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specific Embodiment 1

[0027] Specific embodiment one: with 2 mol FeCl 3 6H 2 O and 2 mol of anhydrous sodium acetate were added to a 100 ml three-neck flask, stirred and mixed for 5 minutes, and 260 mol of ethylene glycol was quickly added, and after 20 minutes of mechanical stirring to obtain a cloudy orange-yellow solution, slowly added 60 mol amine surfactant ethylenediamine, and mechanically stirred for 30 minutes to obtain an orange viscous liquid, stop stirring, measure 70 ml of the mixed liquid into a polytetrafluoroethylene autoclave, put it into an iron shell to seal, and put In a constant temperature oven at 180°C, react for 8 hours. After the polytetrafluoroethylene autoclave was naturally cooled to room temperature, it was taken out, ultrasonically cleaned with absolute ethanol several times until the particles were clean, and then dried in a vacuum oven at 60°C for 12 hours to obtain magnetic Fe3O4 nanochains.

[0028]

specific Embodiment 2

[0029] Specific embodiment two: with 2mol FeCl 3 6H 2 O and 7 mol of anhydrous sodium acetate were added to a 100 ml three-neck flask, stirred and mixed for 5 minutes, and 290 mol of ethylene glycol was quickly added, and after 20 minutes of mechanical stirring to obtain a cloudy orange-yellow solution, slowly added 82 mol amine surfactant triethylenetetramine, and mechanically stirred for 30 minutes to obtain an orange-yellow viscous liquid, stop stirring, measure 60 ml of the mixed liquid into a polytetrafluoroethylene autoclave, put it into an iron shell to seal, and place Put it into a constant temperature oven at 170°C, and react for 7.5 hours. After the polytetrafluoroethylene autoclave was naturally cooled to room temperature, it was taken out, ultrasonically cleaned with absolute ethanol several times until the particles were clean, and then placed in a vacuum oven at 60°C for 12 hours to obtain magnetic Fe3O4 nanochains.

[0030]

specific Embodiment 3

[0031] Specific embodiment three: with 2 mol FeCl 3 6H 2 O and 10 mol of anhydrous sodium acetate were added to a 100 ml three-necked flask, stirred and mixed for 5 minutes, and 360 mol of ethylene glycol was quickly added, and after 20 minutes of mechanical stirring to obtain a cloudy orange-yellow solution, slowly added 100 mol of amine surfactant disodium ethylenediaminetetraacetate, and mechanically stirred for 30 minutes to obtain an orange viscous liquid, stop stirring, measure 80 ml of the mixed solution to a polytetrafluoroethylene autoclave, and put it into an iron The shell was closed, placed in a constant temperature oven at 200°C, and reacted for 9 hours. After the polytetrafluoroethylene autoclave was naturally cooled to room temperature, it was taken out, ultrasonically cleaned with absolute ethanol several times until the particles were clean, and then dried in a vacuum oven at 60°C for 12 hours to obtain magnetic Fe3O4 nanochains.

[0032] Such as figure 1 ...

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Abstract

The invention belongs to the technical field of nano materials, and provides a hydrothermal preparation method and application of a magnetic ferroferric oxide nanochain and provides the magnetic ferroferric oxide nanochain synthesized in the presence of amine surfactants in one step. The magnetic ferroferric oxide nanochain prepared by the method has good absorption to heavy metal ions Cr (VI) and can be used for water treatment. The method provided by the invention is simple in operational step, and the magnetic ferroferric oxide nanochain prepared is stable in repeatability, good in dispersibility, larger in specific surface area and non-toxic, can exist in different acid-base environments stably, and has a good absorption effect to heavy metal ions (especially hexavalent chromium ions).

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a hydrothermal preparation method and application of magnetic ferric iron tetroxide nanochains. Background technique [0002] Chromium is one of the essential trace elements for living organisms. The lack of chromium can lead to metabolic disorders of sugar, fat and other substances, but excessive intake is harmful to organisms and humans. The toxicity of chromium has a great relationship with its existing form. Trivalent chromium compounds are almost non-toxic and necessary for humans and animals; on the contrary, hexavalent chromium compounds are strong oxidizing and carcinogenic. In general, hexavalent chromium is 100 times more toxic than trivalent chromium. my country stipulates that the maximum allowable concentration of chromium in surface water: trivalent chromium is 0.5 mg / L, hexavalent chromium is 0.1 mg / L, and the maximum allowable concentrati...

Claims

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Application Information

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IPC IPC(8): B01J20/06B01J20/28B01J20/30C02F1/28C02F101/22
Inventor 倪红李春霞祁亚军王芳杰李薇
Owner HUBEI UNIV
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