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Carbon magnetic superstructure composite material and its preparation method and application

A composite material and superstructure technology, which is applied in the field of preparing carbon magnetic superstructure composite materials, can solve the problems of complex multi-steps and high cost, and achieve the effects of broad application prospects, low cost and low preparation cost

Active Publication Date: 2019-11-12
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually requires templates, complex multi-step, special equipment, high cost, thus limiting its widespread use

Method used

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  • Carbon magnetic superstructure composite material and its preparation method and application
  • Carbon magnetic superstructure composite material and its preparation method and application
  • Carbon magnetic superstructure composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Accurately weigh 0.36g FeCl 3 ·6H 2 O was placed in an evaporating dish, 1 mL of deionized water was added, stirred to dissolve it fully, and a yellow clear solution was obtained, then 1.22 g (4 mmol) of sodium oleate was added and mixed well. Finally, the mixture was aged in an oven at 85° C. for 3 hours to obtain a transition metal salt-oleate complex.

[0061] After cooling the above-mentioned newly prepared transition metal salt-oleate complex to room temperature, add 10 g of sodium sulfate particles, then fully grind it to powder with an agate mortar, place it in a tube furnace with an ark, and place it in a tube furnace. N 2 Under protection, the temperature was raised to 500°C at a heating rate of 5°C / min, kept for 3 hours, cooled, filtered and washed with deionized water several times, and finally dried at 100°C for 6 hours to obtain the carbon magnetic superstructure composite material.

[0062] The resulting composite material, its phase, and the morphology...

Embodiment 2

[0064] Same step as in Example 1, but the amount of sodium oleate is 3 mmol. The resulting product is a black powder, and the product structure observed under a scanning electron microscope is as follows: Figure 5 As shown, it can be seen that a layer of γ-Fe with a smaller size grows on the surface of the flake graphite 2 o 3 Spherical matrix with dimensions of 20 ± 2 nm. The atomic ratio of elements Fe:C=0.382 was obtained by energy spectrum analysis. Its static magnetic properties are as Figure 4 As shown, the saturation magnetization is 55.27emu·g -1 , The coercivity is 133.22Oe.

Embodiment 3

[0066] Same step as in Example 1, but the amount of sodium oleate is 5 mmol. The resulting product is a black powder, and the product structure observed under a scanning electron microscope is as follows: Figure 6 As shown, it can be seen that there is a layer of larger γ-Fe on the surface of the flaky graphite 2 o 3 Cubic matrix, with a size of 35±5nm, and a small number of matrix particles connected together. The energy spectrum analysis shows that the atomic ratio of Fe:C=0.117. Its static magnetic properties are as Figure 4 As shown, the saturation magnetization is 35.46emu·g -1 , the coercive force is 215.10Oe.

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Abstract

The invention discloses a carbon magnetic super-structure composite material and a preparation method and application thereof. The material is a super-structure orderly distributed by the uniform mono-crystal magnetic nanoparticles on laminar graphite; the magnetic nanoparticles are gamma-FeO3, Fe3O4 or transition metal doped ferrite, the size is 13-40nm, the size of the laminar graphite is 5-30 microns; and the atomic ratio of the iron element to the carbon element is 0.117-0.382. The material is prepared by using one-step self-assembling method, namely, taking the salt-oleate complex containing transition metal as the precursor, and taking sodium salt with high melting point as a template, sintering for 2-6h at 400-550 DEG C under the inert gas shielding, washing to remove the sodium salt. The material disclosed by the invention has excellent microwave absorption characteristic, the reflectivity in the 3.6-18GHz band range is less than -20dB, the maximum reflection loss is -44.0dB to-29.3dB. The material is simple in process and easy for industrial promotion; the provided material is excellent in performance, and has good application prospect at the catalysis, the electrode material, the microwave absorption, high-density magnetic record material, the sensor and like field.

Description

technical field [0001] The invention relates to the technical field of magnetic nanocomposite, in particular to a simple method for preparing a carbon magnetic superstructure composite material. Background technique [0002] Ordered nanostructures refer to nanostructures that are constructed of zero-dimensional and one-dimensional nanomaterials, have certain arrangement rules in the long-range range, and are orderly and stable nanostructures. Ordered nanostructure assembly system is the leading field of nanomaterial synthesis research in the future, and it is a key step to bring nanomaterials to device applications. Scientists have long dreamed of designing, assembling, and developing nanomaterials according to people's wishes. The controllable preparation of nanomaterials and the emergence of ordered nanostructures have realized this dream. [0003] The methods for preparing ordered nanostructures mainly include nanolithography technology (including extreme ultraviolet li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/34H01F1/36H01F41/02
Inventor 童国秀赵彦婷韩佳女张玲梨张高川乔儒吴文华
Owner ZHEJIANG NORMAL UNIVERSITY
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