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A kind of preparation method using chitosan as carbon source carbon-coated nickel-zinc ferromagnetic nanomaterial

A magnetic nanometer, carbon-coated nickel technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems that hinder the application of basic research on carbon-coated metal nanoparticles, complex devices, high cost, etc., and achieve good application prospects, The effect of low residual magnetization and easy operation

Inactive Publication Date: 2016-06-22
NANCHANG HANGKONG UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods or devices are complicated, costly, or energy-intensive, which to some extent hinders the basic research on the application of carbon-coated metal nanoparticles.

Method used

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  • A kind of preparation method using chitosan as carbon source carbon-coated nickel-zinc ferromagnetic nanomaterial

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Effect test

Embodiment 1

[0015] A kind of preparation method that uses chitosan as carbon source carbon to coat nickel-zinc ferromagnetic nanometer material, and its preparation method is:

[0016] (1) Ni 0.6 Zn 0.4 Fe 2 o 4 Preparation of granules:

[0017] Weigh 0.06mol of Ni(NO 3 ) 2 ·6H 2 O, 0.3mol of Fe(NO 3 ) 3 9H 2 O, 0.09mol Zn(NO 3 ) 2 ·6H 2 Dissolve O in 50ml of absolute ethanol, add 2ml of glacial acetic acid, mix thoroughly, place in a 70°C water bath and oscillate in a microwave, add dropwise 30ml of ammonia solution at a rate of 3ml / min, keep the pH of the solution between 9.5-10.0, and react After 100 minutes, the supernatant was filtered off, washed repeatedly with 80°C deionized water and absolute ethanol, and then dried at 100°C to obtain nickel-zinc ferrite powder. The obtained nickel-zinc ferrite powder was placed in a muffle furnace for 350 Calcined at high temperature for 5 hours at ℃, cooled to room temperature, and ground to obtain Ni 0.6 Zn 0.4 Fe 2 o 4 partic...

Embodiment 2

[0023] A kind of preparation method that uses chitosan as carbon source carbon to coat nickel-zinc ferromagnetic nanometer material, and its preparation method is:

[0024] (1) Ni 0.6 Zn 0.4 Fe 2 o 4 Preparation of granules:

[0025] Weigh 0.06mol of Ni(NO 3 ) 2 ·6H 2 O, 0.3mol of Fe(NO 3 ) 3 9H 2 O, 0.09mol Zn(NO 3 ) 2 ·6H 2Dissolve O in 50ml of absolute ethanol, add 3ml of glacial acetic acid, mix thoroughly, place in a 70°C water bath and oscillate in a microwave, add 30ml of ammonia solution dropwise at a rate of 3ml / min, keep the pH of the solution between 9.5-10.0, and react After 120 minutes, the supernatant was filtered off, washed repeatedly with 80°C deionized water and absolute ethanol, and then dried at 100°C to obtain nickel-zinc ferrite powder. The obtained nickel-zinc ferrite powder was placed in a muffle furnace for 400 Calcined at high temperature for 5 hours at ℃, cooled to room temperature, and ground to obtain Ni 0.6 Zn 0.4 Fe 2 o 4 particl...

Embodiment 3

[0031] A kind of preparation method that uses chitosan as carbon source carbon to coat nickel-zinc ferromagnetic nanometer material, and its preparation method is:

[0032] (1) Ni 0.6 Zn 0.4 Fe 2 o 4 Preparation of granules:

[0033] Weigh 0.06mol of Ni(NO 3 ) 2 ·6H 2 O, 0.3mol of Fe(NO 3 ) 3 9H 2 O, 0.09mol Zn(NO 3 ) 2 ·6H 2 Dissolve O in 50ml of absolute ethanol, add 4ml of glacial acetic acid, mix thoroughly, place in a 70°C water bath and oscillate in a microwave, add dropwise 30ml of ammonia solution at a rate of 3ml / min, keep the pH of the solution between 9.5-10.0, and react After 140 minutes, the supernatant was filtered off, washed repeatedly with 80°C deionized water and absolute ethanol, and then dried at 100°C to obtain nickel-zinc ferrite powder. The obtained nickel-zinc ferrite powder was placed in a muffle furnace for 450 Calcined at high temperature for 5 hours at ℃, cooled to room temperature, and ground to obtain Ni 0.6 Zn 0.4 Fe 2 o 4 partic...

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Abstract

The invention discloses a method for preparing a nickel-zinc-iron-iron magnetic nanometer material coated with chitosan as a carbon source carbon. The Ni0.6Zn0.4Fe2O4 magnetic nanoparticle is prepared by a co-precipitation method, and sodium dodecylbenzenesulfonate is Surfactants modify the surface of nickel zinc ferrite, in situ coating Ni0.6Zn0.4Fe2O4 magnetic nanoparticles with chitosan, and at the same time use emulsion cross-linking method to modify the surface of magnetic nanoparticles with chitosan, and finally reduce them with high temperature hydrogen The nickel-zinc ferrite coated with chitosan is processed to obtain the carbon-coated nickel-zinc ferromagnetic nanomaterial. The magnetic nanomaterial has high saturation magnetization, low coercive force and residual magnetization, and is suitable for further modification to prepare magnetic resonance imaging contrast agents, biological analysis and drug carriers, hyperthermia media, catalysts, magnetic recording and magnetic fields. Materials such as separation media have important scientific significance and good application value.

Description

technical field [0001] The invention relates to a method for preparing a nickel-zinc-ferromagnetic nanometer material coated with chitosan as a carbon source carbon, belonging to the field of material preparation. Background technique [0002] Since Ruoff et al. used La-doped graphite rods as anodes for arc discharge in 1993, and found carbon-coated nanoparticles with a core / carbon shell structure in the soot produced, carbon-coated metal nanomaterials have become a new type of carbon. hotspots in materials research. The unique core / shell structure of carbon-coated metal nanomaterials can reduce the agglomeration of metal nanoparticles and protect the metal particles from oxidation. Therefore, the application range of metal nanomaterials has been expanded, and it has shown broad application prospects in many fields such as catalysis, biomedicine, microelectronics, electromagnetics, and optics. Different preparation techniques have also appeared one after another, mainly in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/147C04B35/26C04B35/628
Inventor 谢宇刘福明乐长高唐星华汪月华赖文张卫国潘建飞
Owner NANCHANG HANGKONG UNIVERSITY