A kind of preparation method of superparamagnetic ferrite nanoparticle

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...

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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.

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