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Preparation method for superparamagnetism ferrite nano particles

A nanoparticle and superparamagnetic technology, which is applied in the field of nanomaterials, can solve the problems of high energy consumption, uneven particle size distribution, and low purity of nanoparticles in the production process, and achieve high energy efficiency, high saturation magnetization, and high product quality. good performance

Inactive Publication Date: 2014-05-28
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patents CN102887546A, CN101993115B and CN100344573C disclose the preparation methods of magnetic nanomaterials, which are mainly divided into physical methods (dry method) and chemical methods (wet methods). Physical methods mainly include vapor deposition, laser thermal decomposition, flame decomposition, etc. The prepared nanoparticles often have disadvantages such as low purity, uneven particle size distribution, and high energy consumption in the production process.
The above methods have their own advantages, but they often have harsh conditions such as long reaction time, precise pH control, inert atmosphere protection, high temperature and high pressure equipment, etc.

Method used

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  • Preparation method for superparamagnetism ferrite nano particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (a) Dissolve 0.4g NaOH in 1mL H 2 O, and then mixed with 6mL oleic acid and 3mL absolute ethanol in the process of stirring to obtain a homogeneous transparent solution A.

[0032] (b) Add 50 μL of 80% hydrazine hydrate to solution A, and continue stirring for 5 minutes to obtain homogeneous solution B.

[0033] (c) Prepare 0.5mM ferric ammonium sulfate aqueous solution C and 0.25mM ferrous sulfate aqueous solution D for later use.

[0034] (d) Add 1mL of C solution and 1mL of D solution to solution B in turn, stir quickly and mix well to obtain solution E.

[0035] (e) Transfer the solution E into the quartz reaction tube of the microwave synthesizer, seal it with a matching rubber stopper, put it into the microwave synthesizer, and set the microwave synthesis parameters: power 40W, keep temperature 160°C, keep time 5min. Start the program for microwave synthesis.

[0036] (f) After the reaction stops, take out the reaction tube, add 10mL of absolute ethanol for ult...

Embodiment 2

[0043] (a) Dissolve 0.4g NaOH in 1mL H 2 O, and then mixed with 6mL oleic acid and 3mL absolute ethanol in the process of stirring to obtain a homogeneous transparent solution A.

[0044] (b) Add 50 μL of 80% hydrazine hydrate to solution A, and continue stirring for 5 minutes to obtain homogeneous solution B.

[0045] (c) Prepare 0.5mM ferric chloride aqueous solution C and 0.25mM manganese acetate aqueous solution D for later use.

[0046] (d) Add 1mL of C solution and 1mL of D solution to solution B in turn, stir quickly and mix well to obtain solution E.

[0047] (e) Transfer the solution E into the quartz reaction tube of the microwave synthesizer, seal it with the matching rubber stopper, put it into the microwave synthesizer, and set the microwave synthesis parameters: power 40W, keep temperature 160°C, keep time 1min. Start the program for microwave synthesis.

[0048] (f) After the reaction stops, take out the reaction tube, add 10mL of absolute ethanol for ultraso...

Embodiment 3

[0053] (a) Dissolve 0.4g NaOH in 1mL H 2 O, and then mixed with 6mL oleic acid and 3mL absolute ethanol in the process of stirring to obtain a homogeneous transparent solution A.

[0054] (b) Add 100 μL of 80% hydrazine hydrate to solution A, and continue stirring for 5 minutes to obtain homogeneous solution B.

[0055] (c) Prepare 0.25mM ferric ammonium sulfate aqueous solution C and 0.125mM cobalt acetate aqueous solution D for later use.

[0056] (d) Add 1mL of C solution and 1mL of D solution to solution B in turn, stir quickly and mix well to obtain solution E.

[0057] (e) Transfer the solution E into the quartz reaction tube of the microwave synthesizer, seal it with a matching rubber stopper, put it into the microwave synthesizer, and set the microwave synthesis parameters: power 20W, keep temperature 120°C, keep time 5min. Start the program for microwave synthesis.

[0058] (f) After the reaction stops, take out the reaction tube, add 10mL of absolute ethanol for u...

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Abstract

The invention discloses a preparation method for superparamagnetism ferrite nano particles, relates to nanometer materials and provides a quick, environment-friendly and convenient preparation method for the superparamagnetism ferrite nano particles. The preparation method comprises the following steps: adding a sodium hydroxide solution into oleinic acid, stirring so as to obtain a white sodium oleate solid; then utilizing absolute ethyl alcohol to dissolute the sodium oleate solid during the stirring process and obtaining a homogeneous and transparent solution A; adding a hydrazine hydrate solution into the solution A during the stirring process; continuously stirring, enabling reactants to be well mixed and obtaining a homogeneous and transparent solution B; sequentially adding a Fe <3+> salt solution and a M<2+> salt solution into the solution B, stirring, enabling reactants to be well mixed and obtaining a solution C; transferring the solution C to a quartz reaction tube of a microwave synthesizer; sealing the solution C, packing the solution C into the microwave synthesizer and conducting a microwave synthesis; when the reaction stops, taking out the reaction vessel and adding the absolute ethyl alcohol; conducting an ultrasonic washing or centrifugal separation on the products; obtaining the superparamagnetism ferrite nano particles after the drying.

Description

technical field [0001] The invention relates to nanomaterials, in particular to a class of superparamagnetic ferrite MFe 2 o 4 (M=Fe 2+ ,Mn 2+ 、Co 2+ 、Ni 2+ , Zn 2+ 、Cu 2+ , Mg 2+ etc.) rapid preparation method of nanomaterials. Background technique [0002] Ferric oxide (Fe 3 o 4 ), also known as magnetic iron oxide, has a trans-spinel structure and is an ancient and novel non-metallic magnetic material. Due to its many excellent properties, it is widely used in magnetic recording, mutual inductance devices, catalysis, biological medicine and other fields. Spinel ferrite is a kind of composite oxide with Fe(Ⅲ) as the main component. Its chemical formula is MFe 2 o 4 , where M refers to the divalent metal ion Mn whose ionic radius is similar to that of the ferrous ion 2+ 、Co 2+ 、Ni 2+ , Zn 2+ 、Cu 2+ , Mg 2+ etc., or a variety of metal ion groups whose average chemical valence is divalent (such as Li + 0.5 Fe 3+ 0.5 ). Using different substitute metal...

Claims

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Application Information

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IPC IPC(8): C01G49/06C04B35/26
Inventor 任磊王东
Owner XIAMEN UNIV
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