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Preparation method of gamma-Fe2O3/ZnFe2O4 magnetic composite nano particle

A magnetic composite nano, magnetic nano technology, applied in the field of nano materials, to achieve the effect of small particle size, low cost of raw materials, high saturation magnetization

Inactive Publication Date: 2013-02-06
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the γ-Fe with core-shell structure 2 o 3 / ZnFe 2 o 4 The preparation of magnetic composite nanoparticles has not been reported yet

Method used

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  • Preparation method of gamma-Fe2O3/ZnFe2O4 magnetic composite nano particle
  • Preparation method of gamma-Fe2O3/ZnFe2O4 magnetic composite nano particle
  • Preparation method of gamma-Fe2O3/ZnFe2O4 magnetic composite nano particle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1. Preparation of hydroxide precursor:

[0054] 1) Preparation of FeCl 3 Aqueous solution (40ml, 1mol / L) is solution a; prepare Mg(NO 3 ) 2 Aqueous solution (10ml, 2mol / L), add HCl (4.2mL, 12mol / L) to obtain solution b; prepare NaOH aqueous solution (500mL, 0.7mol / L) as solution c.

[0055] 2) Mix the solution a with the solution b to prepare FeCl 3 / Mg(NO 3 ) 2 Mixed solution, i.e. solution d;

[0056] 3) Quickly pour the solution d into the solution c under stirring to prepare the reaction solution e;

[0057] 4) Heat the reaction liquid e to boiling on the electric stove, keep boiling for 5 minutes, and then stop heating;

[0058] 5) The reaction liquid e was removed from the electric furnace, and naturally cooled to room temperature. After about two hours, the reddish-brown precipitated hydroxide precursor was completely precipitated.

[0059] 2. Preparation of Magnetic Composite Nanoparticles

[0060] 1) Preparation of FeCl 2 Aqueous solution (400mL, 0.25...

Embodiment 2

[0070] 1. Preparation of hydroxide precursor:

[0071] 1) Preparation of FeCl 3 Aqueous solution (40ml, 1mol / L) is solution a; prepare Mg(NO 3 ) 2 Aqueous solution (10ml, 2mol / L), add HCl (4.2mL, 12mol / L) to obtain solution b; prepare NaOH aqueous solution (500mL, 0.7mol / L) as solution c;

[0072] 2) Mix the solution a with the solution b to prepare FeCl 3 / Mg(NO 3 ) 2 Mixed solution, i.e. solution d;

[0073] 3) Quickly pour the solution d into the solution c under stirring to prepare the reaction solution e;

[0074] 4) Heat the reaction liquid e to boiling on the electric stove, keep boiling for 5 minutes, and then stop heating;

[0075] 5) The reaction liquid e was removed from the electric furnace, and naturally cooled to room temperature. After about two hours, the reddish-brown precipitated hydroxide precursor was completely precipitated.

[0076] 2. Preparation of Magnetic Composite Nanoparticles

[0077] 1) Preparation of FeCl 2 Aqueous solution (400mL, 0.25...

Embodiment 3

[0087] 1. Preparation of hydroxide precursor:

[0088] 1) Preparation of FeCl 3 Aqueous solution (40ml, 1mol / L) is solution a; prepare Mg(NO 3 ) 2 Aqueous solution (10ml, 2mol / L), add HCl (4.2mL, 12mol / L) to obtain solution b; prepare NaOH aqueous solution (500mL, 0.7mol / L) as solution c;

[0089] 2) Mix the solution a with the solution b to prepare FeCl 3 / Mg(NO 3 ) 2 Mixed solution, i.e. solution d;

[0090] 3) quickly pour the solution d into the solution c under stirring to prepare the reaction solution e;

[0091] 4) Heating the reaction solution e to boiling on an electric furnace, keeping boiling for 5 minutes, and then stopping heating;

[0092] 5) The reaction liquid e was removed from the electric furnace, and naturally cooled to room temperature. After about two hours, the reddish-brown precipitated hydroxide precursor was completely precipitated.

[0093] 2. Preparation of Magnetic Composite Nanoparticles

[0094] 1) Preparation of FeCl 2 Aqueous solution...

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Abstract

The invention provides a preparation method of gamma-Fe2O3 / ZnFe2O4 magnetic composite nano particle with a core-shell structure. The method comprises the steps that firstly hydroxide precursor is prepared, and the hydroxide precursor is treated through FeCl2 solution to form gamma-Fe2O3 matrix particle; then ZnCl2 is added to perform surface modulation, and a ZnFe2O4 surface layer is formed on gamma-Fe2O3 matrix; and finally gamma-Fe2O3 / ZnFe2O4 magnetic composite nano particle powder is obtained after acetone dehydration and vacuum drying. The method has the advantages that the formation mechanism is unique, the cost of raw material is low, the condition is mild, the energy consumption is low, and the preparation process is easy to operate.

Description

technical field [0001] The invention belongs to the field of nanomaterials, in particular to γ-Fe 2 o 3 / ZnFe 2 o 4 Preparation of Magnetic Composite Nanoparticles. Background technique [0002] Magnetic nanoparticles with a size of less than 100nm are important nanostructured materials, and two-phase or multiphase magnetic composite nanoparticles with different physical or chemical properties may become functional materials with novel properties. [0003] One of the focuses of nanomaterials research is to develop new preparation methods. Wherein the precipitation method has been widely used as a common preparation method, and CN 101497463A discloses a two-step precipitation method to prepare γ-Fe 2 o 3 Nanoparticle methods, including preparation of FeOOH / Mg(OH) by co-precipitation 2 Hydroxide precursors, and hydroxide precursors in FeCl 2 Heat treatment in the solution, cool to room temperature and precipitate again to form γ-Fe 2 o 3 nanoparticles. CN 101811663A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/02B82Y30/00B82Y25/00H01F1/11
Inventor 李建陈龙龙林立华
Owner SOUTHWEST UNIV
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