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Method for compositing Fe3O4 nanorod by utilizing magnetic induction gas-liquid interface method

A gas-liquid interface, nanorod technology, applied in the field of nanomaterials, can solve the problems of high surface energy and magnetism, unfavorable applications and composite reactions, and achieve the effect of high magnetic responsiveness

Inactive Publication Date: 2012-08-01
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to its large specific surface area, high surface energy and magnetic properties, Fe 3 o 4 Nanoparticles are easy to aggregate, which is not conducive to further applications and complex reactions

Method used

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  • Method for compositing Fe3O4 nanorod by utilizing magnetic induction gas-liquid interface method
  • Method for compositing Fe3O4 nanorod by utilizing magnetic induction gas-liquid interface method
  • Method for compositing Fe3O4 nanorod by utilizing magnetic induction gas-liquid interface method

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Experimental program
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Effect test

Embodiment 1

[0028] In the reaction vessel, prepare FeCl 3 ·6H 2 O and FeSO 4 ·7H 2 Mixed solution of O, ultrasonic dispersion; FeCl in mixed solution 3 ·6H 2 O and FeSO 4 ·7H 2The molar ratio of O is 1.75:1; seal the reaction vessel, evacuate the reactor through the connecting pipe, and fill it with nitrogen, so that the reaction vessel is under nitrogen protection; place the reaction vessel in a water bath at 65°C, and apply a magnetic field of 4000Gs ; Feed ammonia into the mixed solution of the reaction vessel, the feed amount of ammonia is 17% of the solution quality, control the feed rate of ammonia 0.4g / min; heating reaction 80min in the water bath, the reaction solution presents dark brown precipitation ; Cool to room temperature, wash the product with distilled water and ethanol respectively; dry in a vacuum oven at 25°C for 12h to obtain Fe 3 o 4 Magnetic nanorods, the length of the rod-like structure is about 60-90nm, and the saturation magnetization is 75 emu / g.

Embodiment 2

[0030] In the reaction vessel, prepare FeCl 3 ·6H 2 O and FeSO 4 ·7H 2 Mixed solution of O, ultrasonic dispersion; FeCl in mixed solution 3 ·6H 2 O and FeSO 4 ·7H 2 The molar ratio of O is 2:1; seal the reaction vessel, evacuate the reactor through the connecting pipe, and fill it with nitrogen, so that the reaction vessel is under nitrogen protection; place the reaction vessel in a water bath at 75°C, and apply a magnetic field of 6000Gs ; Feed ammonia into the mixed solution of the reaction vessel, the feed amount of ammonia is 17% of the solution quality, control the feed rate of ammonia 0.4g / min; heating reaction 80min in the water bath, the reaction solution presents dark brown precipitation ; Cool to room temperature, wash the product with distilled water and ethanol respectively; dry in a vacuum oven at 25°C for 12h to obtain Fe 3 o 4 Magnetic nanorods, the length of the rod-like structure is 70-100nm, and the saturation magnetization is 78emu / g.

Embodiment 3

[0032] In the reaction vessel, prepare FeCl 3 ·6H 2 O and FeSO 4 ·7H 2 Mixed solution of O, ultrasonic dispersion; FeCl in mixed solution 3 ·6H 2 O and FeSO 4 ·7H 2 The molar ratio of O is 1.75:1; seal the reaction vessel, evacuate the reactor through the connecting pipe, and fill it with nitrogen, so that the reaction vessel is under nitrogen protection; place the reaction vessel in a water bath at 75°C, and apply a magnetic field of 8000Gs ; Feed ammonia into the mixed solution of the reaction vessel, the feed amount of ammonia is 17% of the solution quality, control the feed rate of ammonia 0.6g / min; heating reaction 70min in the water bath, the reaction solution presents dark brown precipitation ; Cool to room temperature, wash the product with distilled water and ethanol respectively; dry in a vacuum oven at 25°C for 12h to obtain Fe 3 o 4 Magnetic nanorods, the length of the rod-like structure is 75-100nm, and the saturation magnetization is 79emu / g.

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Abstract

The invention provides a method for compositing a Fe3O4 nanorod structure through a gas-liquid interface under the magnetic induction. The method comprises the following steps of: introducing ammonia into a solution dissolved with iron ions and ferrous ions under the regulation of an external magnetic field, and standing for 70-90 minutes at the temperature of 55-75 DEG C until a black brown sediment appears in the solution; and cooling to room temperature, washing with distilled water and alcohol respectively, vacuum-drying, and obtaining a Fe3O4 nanorod with the length of the namorod structure being 30-120 nm. The magnetism of the Fe3O4 nanorod structure can be analyzed and discovered by using a vibrating sample magnetometer, the residual magnetism and a coercive force of the Fe3O4 nanorod structure both can be omitted under the condition without the external magnetic field, the saturation magnetization is 75-80 emu / g, and the superparamagnetism is expressed at the room temperature; and simultaneously, the Fe3O4 nanorod structure also has a higher magnetic responsibility and has a potential application prospect in fields of targeted therapy and shielding.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and relates to a Fe 3 o 4 A method for preparing nanorods, in particular to a magnetic field-induced gas-liquid interface method for synthesizing Fe 3 o 4 nanorod approach. Background technique [0002] Magnetic nanoparticles exhibit an unusual variety of magnetic behaviors due to their surface / interface effects. Ferroferric oxide nanoparticles are a kind of high Curie temperature (850K) and high saturation magnetization (92Am at 300K) 2 / kg) of magnetic oxides are widely used in magnetic resonance imaging, catalytic materials, magnetic data storage devices and clinical targeted drug delivery, etc. [0003] For nanoscale Fe 3 o 4 , due to its compatibility with biological tissues, electrical and magnetic properties related to size and shape, it is widely used in the fields of magnetic ink, electronic and biological sensitive materials, high-density magnetic recording media and biomedi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08B82Y40/00
Inventor 莫尊理张春李贺军冯超
Owner NORTHWEST NORMAL UNIVERSITY
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