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Preparation method of multi-morphologynano-sized zinc ferrite

A technology of nano-zinc ferrite and zinc ferrite, which is applied in the direction of nanotechnology, chemical instruments and methods, iron compounds, etc., can solve the problems of ineffective control of shape changes, inconvenient operation, limiting industrial application and production efficiency, etc. Achieve the effect of broad application market and prospect, improve production efficiency and reduce production cost

Inactive Publication Date: 2014-04-30
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing methods can only produce products with one shape, and cannot effectively control the change of shape. If ZnFe with various shapes needs to be obtained 2 o 4 , you need to use different methods and equipment to manufacture, and the operation is extremely inconvenient, which seriously limits the ZnFe 2 o 4 Industrial application and production efficiency

Method used

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  • Preparation method of multi-morphologynano-sized zinc ferrite
  • Preparation method of multi-morphologynano-sized zinc ferrite
  • Preparation method of multi-morphologynano-sized zinc ferrite

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Weigh 2.2g of zinc acetate dihydrate, 8.08g of ferric nitrate nonahydrate and 13g of polyvinyl alcohol (model 1750±50, Sinopharm Chemical Reagent Co., Ltd.), add them to 105ml of deionized water, stir well, and obtain a mixed solution;

[0031] The mixed solution was electrostatically sprayed to obtain a precursor with a spherical shape, wherein the electrostatic voltage was 10 kV, and the spraying distance was 8 cm;

[0032] The precursor with spherical shape was heated up to 350°C at a pre-calcination rate of 5°C / min and kept for 2 hours, and then heated to 1000°C with a calcination rate of 5°C / min and kept for 1 hour, and cooled naturally to obtain material 1 .

[0033] Adopt X-ray diffraction analyzer (XRD, Model X'TRAX) to carry out phase composition analysis, the result is as follows figure 1 As shown, it can be seen that material 1 is pure phase zinc ferrite (ZnFe 2 o 4 ). A cold field emission scanning electron microscope (FESEM, S-4800) was used t...

Embodiment 2

[0035] Weigh 1.36g of zinc chloride, 7.06g of iron acetylacetonate and 18g of polyvinylpyrrolidone K-30 (Sinopharm Chemical Reagent Co., Ltd.) into 100ml of ethanol solution, stir well to obtain a mixed solution;

[0036] The mixed solution was electrostatically sprayed to obtain a precursor with a fibrous shape, wherein the electrostatic voltage was 15 kV, and the spraying distance was 13 cm;

[0037] The precursor of fibrous morphology was raised to 500°C at a pre-calcination heating rate of 1°C / min and kept for 4 hours, then raised to 700°C at a calcination heating rate of 1°C / min and held for 5 hours, and naturally cooled to obtain the material 2 4 .

[0038] Adopt X-ray diffraction analyzer (XRD, Model X'TRAX) to carry out phase composition analysis, the result is as follows image 3 As shown, it can be seen that material 2 is pure phase zinc ferrite (ZnFe 2 o 4 ). A cold field emission scanning electron microscope (FESEM, S-4800) was used to test the micro...

Embodiment 3

[0040] Weigh 2.2 g of zinc acetate dihydrate, 5.41 g of ferric chloride hexahydrate and 10 g of polyethylene oxide (molecular weight 1,000,000, Shanghai Liansheng Chemical Co., Ltd.), add them to 35 ml of N,N-dimethylformamide solution, stir well, get a mixed solution;

[0041] The mixed solution was electrostatically sprayed to obtain a precursor with a bead-shaped morphology, wherein the electrostatic voltage was 20 kV, and the spraying distance was 20 cm;

[0042] The rod-shaped precursor was heated up to 400°C at a pre-calcination rate of 3°C / min and kept for 3 hours, then heated to 900°C at a calcination rate of 3°C / min and kept for 3 hours, and cooled naturally to obtain material 3 .

[0043] Adopt X-ray diffraction analyzer (XRD, Model X'TRAX) to carry out phase composition analysis, the result is as follows Figure 5 As shown, it can be seen that material 3 is pure phase zinc ferrite (ZnFe 2 o 4 ). A cold field emission scanning electron microscope (FESEM, ...

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Abstract

The invention provides a preparation method, and relates to the field of nano inorganic non-metallic materials. The preparation method comprises the following steps: adding a metal salt and an organic linear polymer into a solvent, and uniformly stirring the mixture so as to obtain a mixed solution; electrostatically spraying the mixed solution, and obtaining a precursor; heating the precursor to a temperature of 350-500 DEG C at a presintering heating rate and keeping the temperature for 2-4h, and heating the precursor to reach the temperature of 700-1000 DEG C at a calcining heating rate and keeping the temperature for 1-5h, naturally cooling the recursor, and obtaining the nanoZnFe2O4. According to the invention, nanoZnFe2O4 materials with one system and multi-morphology are synthetized by the same method, ZnFe2O4with sphere-shaped, fibre-shaped, chain bead-shaped and rod-shaped morphology is obtained by controlling the raw material ratio and regulating and controlling the heat treatment process, the production cost is effectively reduced, the production efficiency is improved, and the operation is convenient, therefore, the preparation method is suitable for industrial production of a certain scale.

Description

technical field [0001] The invention relates to the field of nano inorganic non-metallic materials, in particular to a preparation method of multi-morphology nano zinc ferrite. Background technique [0002] In recent years, nano-zinc ferrite (ZnFe 2 o 4 ) material is widely used in magnetic materials, new energy materials, stealth materials, environmental materials and other fields, and is an important functional material. According to many research reports, the shape is the influence of nano-ZnFe 2 o 4 It is an important factor affecting magnetic properties, absorbing properties, adsorption properties, catalytic properties, and electrochemical properties. Therefore, a lot of research has focused on the preparation of nano-ZnFe with different morphologies. 2 o 4 . [0003] At present, in many nano ZnFe 2 o 4 Among the preparation methods, co-precipitation method, solid phase method, solvothermal method, sol-gel method, template method, electrospinning method, etc. oc...

Claims

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Application Information

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IPC IPC(8): C01G49/00B82Y40/00
Inventor 黄啸谷赖敏程国生张其土
Owner NANJING UNIV OF INFORMATION SCI & TECH
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