Method for synthesizing magnetic metallic oxide Nano wire in high length-diameter ratio

A magnetic metal, high aspect ratio technology, applied in the direction of magnetic objects, magnetic materials, nanotechnology, etc., can solve the problem of inability to synthesize nanomaterials with aspect ratio, and achieve the effect of easy popularization and application, wide application and wide application

Inactive Publication Date: 2006-04-19
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Kyoungja (Japan) et al. synthesized γ-Fe by the reverse micellar method protected by oleic acid 2 o 3 Nanorods, although the aspect ratio of this material is relate

Method used

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  • Method for synthesizing magnetic metallic oxide Nano wire in high length-diameter ratio
  • Method for synthesizing magnetic metallic oxide Nano wire in high length-diameter ratio

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Add 10ml of P123 alcohol solution to 250ml of water and mix evenly; then add 5ml of ethylene glycol and 1g of hexamethylenetetramine, and stir evenly; pass in nitrogen to exhaust oxygen, after heating up to 80°C, add FeCl at a certain speed 2 and FeCl 3 The mixed solution of which Fe in the system 2+ The concentration of ions is 1~4×10 - 3 mol.L -1 , Fe 3+ The concentration of ions is 2~8×10 -3 mol.L -1 , the addition rate is 1.7-2.5ml / min, the molar ratio of the two ions is 1:2, after several hours of continuous reaction, the reaction is stopped, and the temperature is lowered to room temperature. After precipitating, separating and washing under a magnetic field, dry at 60° C. for 12 hours, and carry out several times to separate and purify the one-dimensional material particles. The proportion of linear structure in the product is higher than 70%, the diameter of the nanowire is 10-15 nanometers, and the maximum aspect ratio can reach 500.

Embodiment 2

[0026] Add 20ml of PEG aqueous solution to 250ml of water and mix evenly; then add 10ml of ethylene glycol and 2g of hexamethylenetetramine, and stir evenly; pass in nitrogen to exhaust oxygen, heat up to 80°C, and then add FeSO at a certain speed 4 and FeCl 3 The mixed solution of which Fe in the system 2+ The concentration of ions is 1~4×10 -3 mol.L -1 , Fe 3+ The concentration of ions is 2~8×10 -3 mol.L -1 , the molar ratio of the two ions is 1:2, the addition rate is 2.5-4ml / min, after several hours of continuous reaction, stop the reaction and cool down to room temperature. After precipitating, separating and washing under a magnetic field, dry at 60° C. for 12 hours, and carry out several times to separate and purify the one-dimensional material particles. The obtained nanowire has a diameter of 20-30 nanometers and an aspect ratio of 50-300.

Embodiment 3

[0028]Add 20ml of PVA aqueous solution to 250ml of water and mix evenly; then add 20ml of ethylene glycol, 3g of hexamethylenetetramine, and stir evenly; through nitrogen exhaust, after heating up to 80°C, add manganese nitrate at a certain speed, Mixed solution of ferrous chloride and ferric chloride (molar ratio Mn 2+ : Fe 2+ : Fe 3+ =1:1:4), wherein the concentration of divalent metal ions in the system is 2~4×10 -3 mol.L 1 , the concentration of trivalent Fe ions is 4~8×10 -3 mol.L -1 , the addition rate is 1.2-1.7ml / min, after several hours of continuous reaction, stop the reaction and cool down to room temperature. After separating and washing under a magnetic field, dry at 60° C. for 12 hours, and carry out several times to separate and extract one-dimensional material particles. The obtained nanowire has a diameter of 20-30 nanometers and an aspect ratio of 10-150.

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Abstract

Through wet chemical method, the invention prepares one-dimensional Nano material of magnetic metallic oxide; especially, the invention is related to composite system of polyalcohol. In water solution of hydrophilic high polymer, using synthesis under metallic ion coprecipitation method obtains Nano wire of magnetic metallic oxide with high length-diameter ratio and even diameter. Adjusting scale among components of polyalcohol and speed for adding components can control length-diameter ratio of Nano wire of magnetic metallic oxide.

Description

technical field [0001] The invention belongs to the technical field of preparing one-dimensional magnetic metal oxide nanometer materials by wet chemical method, in particular to a method for synthesizing magnetic metal oxide nanowires with high aspect ratio in a complex polyol system. Background technique [0002] Recently, one-dimensional nanostructured materials such as wires, rods, strips, tubes, etc. are gradually becoming the focus of scientific research. Due to the unique mesoscopic physical and chemical properties of one-dimensional nanostructured materials (which are completely absent from macroscopic materials), they have potential applications in the assembly of nanodevices. One-dimensional nanomaterials can provide a good research system in terms of electrothermal transport and other functions, and they can be used to prepare nanoscale devices such as electricity, optoelectronics, electrochemical and motors. One-dimensional magnetic nanomaterials have also recei...

Claims

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Application Information

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IPC IPC(8): H01F41/00H01F1/00B82B3/00
Inventor 唐芳琼黄忠兵张彦奇
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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