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Reduced graphene oxide, tin dioxide and ferric oxide composites

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

Active Publication Date: 2018-09-28
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 composites
  • Reduced graphene oxide, tin dioxide and ferric oxide composites
  • Reduced graphene oxide, tin dioxide and ferric oxide composites

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The composite material of reduced graphene oxide, tin dioxide and iron trioxide of the present invention is prepared according to the following method, including the 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 and slowly add 200mL of concentrated sulfuric acid and 20mL of phosphoric acid; stir well, put it in an oil bath, and stir at 70°C for 18 hours; After cooling to room temperature, slowly pour the above mixed solution into a plastic beaker containing 400 mL of ice, add 5 mL of hydrogen peroxide dropwise, the solution turns bright yellow to obtain a graphene oxide solution; use dilute hydrochloric acid for the graphene oxide solution It is washed, then washed with absolute ethanol to near neutrality, and dried under vacuum at 40° C. for 18 hours to obtain graphene oxide powder.

[0035] (2) Preparation of microwave absorbing materials for reduced graphene oxide, ...

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 and slowly add 450mL of concentrated sulfuric acid and 30mL of phosphoric acid; stir well, put it in an oil bath, and stir for 24 hours at 50°C; After cooling to room temperature, slowly pour the above mixed solution into a plastic beaker containing 400 mL of ice, add 10 mL of hydrogen peroxide dropwise, the solution turns bright yellow to obtain a graphene oxide solution; use dilute hydrochloric acid for the graphene oxide solution It is washed, then washed with absolute ethanol to near neutrality, and dried under vacuum at 40° C. for 18 hours to obtain graphene oxide powder.

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

[0041] Add 80 mg of graphene oxide to a mixed solution of 20 mL of ethanol and 50 mL of deionized water, disperse ultrasonically for 1 hour, then add...

Embodiment 3

[0043] (1) Preparation of graphene oxide

[0044] Add 3.0g natural graphite powder and 18g potassium permanganate into the beaker, mix well and slowly add 150mL concentrated sulfuric acid and 10mL phosphoric acid; stir well, put it in an oil bath, and stir at 80℃ for 12 hours; After cooling to room temperature, slowly pour the above mixed solution into a plastic beaker containing 400 mL of ice, add 5 mL of hydrogen peroxide dropwise, the solution turns bright yellow to obtain a graphene oxide solution; use dilute hydrochloric acid for the graphene oxide solution It is washed, then washed with absolute ethanol to near neutrality, and dried under vacuum at 40° C. for 18 hours to obtain graphene oxide powder.

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

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

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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 iron trioxide. 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 harms people's health. Therefore, composite materials have attracted more and more attention from researchers in military, industrial and commercial fields. [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 and metals, but due to factors such as high density and poor thermal stability, it is difficult to meet the re...

Claims

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Application Information

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Patent Type & Authority Patents(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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