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Graphene/metal oxide/metal ternary nano composite magnetic material and preparation method thereof

A nano-composite and magnetic material technology, applied in the field of wave-absorbing materials, can solve the problems of difficulty in improving the dielectric properties of graphene, increasing costs, and affecting material impedance matching, and achieves high preparation efficiency, uniform distribution, and excellent wave-absorbing performance Effect

Active Publication Date: 2020-09-01
BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing reported research, magnetic particles are usually loaded on the defects on the surface of graphene, so the dielectric properties of graphene are difficult to improve, which affects the impedance matching of the material
In addition, the preparation process of graphene and the loading of magnetic materials are often separated, which may increase the cost of later application

Method used

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  • Graphene/metal oxide/metal ternary nano composite magnetic material and preparation method thereof
  • Graphene/metal oxide/metal ternary nano composite magnetic material and preparation method thereof
  • Graphene/metal oxide/metal ternary nano composite magnetic material and preparation method thereof

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preparation example Construction

[0051] A second aspect of the present invention is to provide the preparation method of the graphene / metal oxide / metal ternary nanocomposite magnetic material described in the first aspect of the present invention, the preparation method comprising the following steps:

[0052] Step 1, carrying out hydrothermal reaction through pretreated graphene oxide, metal salt, sodium acetate and polyethylene glycol;

[0053] In the present invention, before preparation, graphene oxide needs to be pretreated, and the pretreatment includes adding graphene oxide to ethylene glycol for crushing and dispersing; ethylene glycol is used as a solvent to uniformly disperse graphene oxide in it . Graphene oxide dispersed uniformly in ethylene glycol can be more uniformly dispersed with metal salts and other additives during the later reaction process, which is more conducive to the progress of the reaction.

[0054] The metal salt is selected from one or more of iron, cobalt, nickel-containing or...

Embodiment 1

[0089] 2.4g FeCl 3 ·6H 2 O and 2.4g CH 3 COONa and 5.4 g of polyethylene glycol were added into a polytetrafluoroethylene-lined hydrothermal kettle. Then, 30 mL of graphene oxide crushed by ethylene glycol was added into the hydrothermal kettle, wherein the amount of graphene oxide was 300 mg, and then the hydrothermal kettle was heated in an oven at 200° C. for 12 hours. After the hydrothermal kettle is cooled to room temperature, the reacted liquid is poured into a beaker with a magnet at the bottom, and the magnet absorbs the black nanomaterial to separate it from the supernatant. Finally, the product was obtained by washing with ultrapure water and absolute ethanol for 3 times and freeze-drying, which was named rGO-Fe. 3 o 4 .

Embodiment 2

[0091] The rGO-Fe that embodiment 1 makes 3 o4 The annealing treatment was carried out in a tube furnace, the annealing temperature was 600°C, the heating rate was 5°C / min, and the annealing time was 2h. The entire annealing process was carried out under an argon atmosphere. The annealed sample was named rGO-Fe 3 o 4 -600.

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Abstract

The invention discloses a preparation method of a graphene / metal oxide / metal ternary nano composite magnetic material. The preparation method comprises the following steps of carrying out hydrothermalreaction on the pretreated graphene oxide and metal salt to obtain a graphene / magnetic material intermediate product, and carrying out annealing treatment to finally obtain the graphene / metal oxide / metal ternary nano composite magnetic material. The preparation method provided by the invention is simple and efficient, and the impedance matching performance of the graphene / metal oxide / metal ternary nano composite magnetic material is improved through the annealing treatment, so that the material has the excellent wave absorbing performance.

Description

technical field [0001] The invention relates to the field of wave-absorbing materials, in particular to a method for preparing a graphene / metal oxide / metal ternary nanocomposite magnetic material. Background technique [0002] Graphene is a carbon atom with sp 2 The hybrid orbitals form a hexagonal two-dimensional carbon nanomaterial with a honeycomb lattice. Graphene has excellent optical, electrical, and mechanical properties, and has shown broad application prospects in materials science, micro-nano processing, energy, biomedicine, and drug delivery. The traditional preparation methods of graphene include mechanical exfoliation method, redox method, SiC epitaxial growth method and chemical vapor deposition method. Although the preparation of graphene by chemical vapor deposition can obtain high-quality graphene, its production speed is slow and it is not suitable for large-scale production, and the methods of mechanical exfoliation and SiC epitaxial growth also suffer f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q17/00H05K9/00B82Y25/00B82Y30/00
CPCH01Q17/00H05K9/0081B82Y25/00B82Y30/00
Inventor 马慧玲张秀芹杜中贺王锐陈熙邦翟茂林吴晶张雅晖齐悦杨莹雪
Owner BEIJING INSTITUTE OF CLOTHING TECHNOLOGY