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Preparation method and application of Fe3O4-Co3O4 porous magnetic composite material

A magnetic composite material, cobalt tetroxide technology, applied in electrical components, battery electrodes, circuits, etc., to achieve the effects of simple preparation method, simple and controllable method, and special appearance

Inactive Publication Date: 2012-07-11
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, additional structure-directing agents such as 3-aminopropyltriethoxysilane (APTES) are required throughout the reaction, and the shell is non-porous

Method used

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  • Preparation method and application of Fe3O4-Co3O4 porous magnetic composite material
  • Preparation method and application of Fe3O4-Co3O4 porous magnetic composite material
  • Preparation method and application of Fe3O4-Co3O4 porous magnetic composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0034] 1. Preparation of ferroferric oxide-cobalt trioxide yolk-shell porous magnetic composite material:

[0035] (a) mixing step: add 0.1221g cobalt chloride and ferrous sulfate 0.0634g to 20ml volume ratio at room temperature in the mixed solvent of water, ethanol, butanol of 120:100:1, and add 0.16g urea and 0.10g trisodium citrate, fully stirred to make yellow-brown solution, pH is 5;

[0036] (b) Heating step: heating the solution prepared in step (a) to 120° C., and the reaction time is 10 hours;

[0037] (c) drying step: cooling, filtering, and washing the precipitate obtained in (b) heating step to neutrality, and drying at 60°C to obtain a non-porous yolk-shell material;

[0038] (d) Calcining the product obtained in (c) at a temperature of 300° C. for 1 hour. The calcination does not require any protective gas, just heating with air and cooling to room temperature. The process is to convert the non-porous material obtained in the (c) stage into a porous ferric oxi...

Embodiment 2

[0047] 1. Preparation of ferroferric oxide-cobalt trioxide yolk-shell porous magnetic composite material:

[0048](a) Mixing step: Add 0.1223g cobalt chloride and 0.0634g ferrous sulfate mixture to water, ethanol, butanol solvent with a volume ratio of 100:100:3 at room temperature, and add 0.16g urea and 0.10g Trisodium citrate, fully stirred to make a yellow-brown solution, pH 5;

[0049] (b) Heating step: heating the solution prepared in step (a) to 120°C for a reaction time of 5 hours;

[0050] (c) drying step: cooling, filtering, and washing the precipitate obtained in (b) heating step to neutrality, and drying at 60°C to obtain a non-porous yolk-shell material;

[0051] (d) Calcining the product obtained in (c) at a temperature of 300° C. for 1 hour. The calcination does not require any protective gas, just heating with air and cooling to room temperature. The process is to transform the non-porous material obtained in the (c) stage into a porous ferric oxide-cobalt te...

Embodiment 3

[0053] 1. Preparation of ferroferric oxide-cobalt trioxide yolk-shell porous magnetic composite material:

[0054] (a) Mixing step: add 0.1465g cobalt chloride and 0.0645g ferrous sulfate mixture to the water, ethanol, butanol solvent with a volume ratio of 120:100:1 at room temperature, and add 0.16g urea and 0.10g Trisodium citrate, fully stirred to make a yellow-brown solution, pH 5;

[0055] (b) Heating step: heating the solution prepared in step (a) to 150° C., and the reaction time is 10 hours;

[0056] (c) drying step: cooling, filtering, and washing the precipitate obtained in (b) heating step to neutrality, and drying at 60°C to obtain a non-porous yolk-shell material;

[0057] (d) Calcining the product obtained in (c) at a temperature of 300° C. for 1 hour. The calcination does not require any protective gas, just heating with air and cooling to room temperature. The process is to convert the non-porous material obtained in the (c) stage into a porous ferric oxide-...

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Abstract

The invention discloses a preparation method of a Fe3O4-Co3O4 porous magnetic composite material. The preparation method comprises the following steps of (a) blending, (b) heating, (c) drying and (d) calcining. In comparison with the prior art, the invention has the following advantages: (1) other oxides are not found in the product, and the product is a heterogeneous material and has uniform particle size, special morphology, high activity, simple one-step synthesis method, large apparent density, and good magnetic performance; (2) the method has high yield, low cost, short production flow and is convenient in scale-up experiment; (3) the method is simple and controllable, and has low demand for equipment, so that the method is suitable for industrial production; and (4) the magnetic material with a heterogeneous oxide core-shell structure provided by the invention can be effectively applied to lithium-ion and fuel cell materials.

Description

Technical field: [0001] The invention relates to the preparation and application fields of nanometer metal oxides, and provides a preparation method of ferric trioxide-cobalt tetroxide yolk-shell porous magnetic composite material. technical background: [0002] The core-shell structure and empty-shell structure can prevent the aggregation of the core, and these materials are often used in controlled release, controllable catalysis, and optical and electrical applications. The Yolk-shell structure is different from the core-shell and hollow-shell structures in that it has an empty shell and a core that can move freely in the hollow shell. And a heterogeneous Yolk-shell structure, because of the unique properties of their free-moving core, the gap between the core and the shell, and the functional shell, makes them ideal for applications such as nanoreactors, biopharmaceuticals, lithium-ion batteries, and photocatalysis. material with great potential. [0003] A commonly us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/52H01M4/62
CPCY02E60/12Y02E60/10
Inventor 耿保友叶一星
Owner ANHUI NORMAL UNIV
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