Reduced graphene oxide, tin dioxide and ferric oxide composite material

A technology of ferric oxide and tin dioxide, applied in chemical instruments and methods, other chemical processes, electrical components, etc., can solve the problems of high density and poor thermal stability, achieve low density, promote peeling, and improve microwave absorption. performance effect

Active Publication Date: 2016-09-21
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the composite materials that have been studied include ferrite, metal, etc., but due to factors such as high density and poor thermal stability, it is difficult to meet the requirements of composite materials.

Method used

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  • Reduced graphene oxide, tin dioxide and ferric oxide composite material
  • Reduced graphene oxide, tin dioxide and ferric oxide composite material
  • Reduced graphene oxide, tin dioxide and ferric oxide composite material

Examples

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Embodiment 1

[0032] The reduced graphene oxide, tin dioxide and ferric oxide composite material of the present invention is prepared according to the following method, comprising steps:

[0033] (1) Preparation of graphene oxide

[0034] Add 3.0g of natural graphite powder and 25g of potassium permanganate into the beaker, mix well, then slowly add 200mL of concentrated sulfuric acid and 20mL of phosphoric acid; stir well, put it into an oil bath, and stir at 70°C for 18 hours; stir After cooling to room temperature, slowly pour the above mixed solution into a plastic beaker filled with 400mL of ice, add 5mL of hydrogen peroxide drop by drop, the solution turns bright yellow to obtain a graphene oxide solution; washing, and then washing with absolute ethanol until nearly neutral, and vacuum drying at 40° C. for 18 hours to obtain graphene oxide powder.

[0035] (2) Preparation of reduced graphene oxide, tin dioxide and ferric oxide microwave absorbing materials

[0036]Add 50 mg of graph...

Embodiment 2

[0038] (1) Preparation of graphene oxide

[0039] Add 3.0g of natural graphite powder and 18g of potassium permanganate into the beaker, mix well, then slowly add 450mL of concentrated sulfuric acid and 30mL of phosphoric acid; stir well, put it in an oil bath, and stir at 50°C for 24 hours; stir After cooling to room temperature, slowly pour the above mixed solution into a plastic beaker filled with 400mL ice, add 10mL hydrogen peroxide drop by drop, the solution turns bright yellow to obtain a graphene oxide solution; washing, and then washing with absolute ethanol until nearly neutral, and vacuum drying at 40° C. for 18 hours to obtain graphene oxide powder.

[0040] (2) Preparation of reduced graphene oxide, tin dioxide and ferric oxide microwave absorbing materials

[0041] Add 80 mg of graphene oxide into a mixed solution of 20 mL of ethanol and 50 mL of deionized water, ultrasonically disperse for 1 hour, then add 0.5406 g of ferric chloride hexahydrate and 5.406 g of ...

Embodiment 3

[0043] (1) Preparation of graphene oxide

[0044] Add 3.0g of natural graphite powder and 18g of potassium permanganate into the beaker, mix well, then slowly add 150mL of concentrated sulfuric acid and 10mL of phosphoric acid; stir well, put it in an oil bath, and stir at 80°C for 12 hours; stir After cooling to room temperature, slowly pour the above mixed solution into a plastic beaker filled with 400mL of ice, add 5mL of hydrogen peroxide drop by drop, the solution turns bright yellow to obtain a graphene oxide solution; washing, and then washing with absolute ethanol until nearly neutral, and vacuum drying at 40° C. for 18 hours to obtain graphene oxide powder.

[0045] (2) Preparation of reduced graphene oxide, tin dioxide and ferric oxide microwave absorbing materials

[0046] Add 20 mg of graphene oxide into a mixed solution of 20 mL of ethanol and 50 mL of deionized water, ultrasonically disperse for 1 hour, then add 0.5406 g of ferric chloride hexahydrate and 0.5406...

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Abstract

The invention discloses a reduced graphene oxide, tin dioxide and ferric oxide composite material, and a preparation method and an application thereof. The preparation method of the composite material comprises the following steps: 1, carrying out an oxidation reaction on natural graphite powder to obtain graphene oxide; and 2, carrying out a hydrothermal reduction reaction on graphene oxide, tin tetrachloride pentahydrate and iron chloride hexahydrate to obtain the reduced graphene oxide, tin dioxide and ferric oxide composite material. Tin dioxide and ferric oxide are compounded with reduced graphene oxide to increase the interface polarization ability of the composite material, and the impedance matching and the attenuation matching of the composite material are improved by means of synergism of magnetic loss and dielectric loss in order to improve the microwave absorption performance.

Description

technical field [0001] The invention relates to a composite material, in particular to a composite material of reduced graphene oxide, tin dioxide and ferric oxide. It belongs to the technical field of functional materials. Background technique [0002] Electronic technology and electronic equipment bring convenience to people's daily life, but also bring electromagnetic pollution problems. Electromagnetic pollution not only affects the normal use of electronic equipment, but also endangers people's health. Therefore, composite materials have attracted more and more attention from researchers in the fields of military, industry and commerce. [0003] Composite materials refer to a class of materials that can absorb and dissipate electromagnetic waves through impedance matching and attenuation matching. At present, the composite materials that have been studied include ferrite, metal, etc., but due to factors such as high density and poor thermal stability, it is difficult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00H05K9/00
CPCC09K3/00H05K9/0081
Inventor 邢宏龙申子瑶朱燕婷刘振峰
Owner ANHUI UNIV OF SCI & TECH
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