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Method for preparing reduced graphene oxide/ferroferric oxide nano-grade wave-absorbing materials

A nano wave-absorbing material, the technology of ferroferric oxide, which is applied in the direction of chemical instruments and methods, and other chemical processes, can solve the problems of harsh preparation conditions, difficult large-scale production, and poor performance of composite materials, and achieve large-scale The effect of production, wide absorption frequency and short time consumption

Inactive Publication Date: 2013-06-26
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to avoid the deficiencies of the prior art, the present invention proposes a method for preparing reduced graphene oxide / ferric oxide nano-absorbing materials, which overcomes the high-temperature reduction method to prepare RGO-Fe 3 o 4 The preparation conditions of composite materials are harsh, the process is complicated, the time is long, it is difficult to produce on a large scale, and the performance is not good.

Method used

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  • Method for preparing reduced graphene oxide/ferroferric oxide nano-grade wave-absorbing materials
  • Method for preparing reduced graphene oxide/ferroferric oxide nano-grade wave-absorbing materials
  • Method for preparing reduced graphene oxide/ferroferric oxide nano-grade wave-absorbing materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Prepare a GO aqueous solution with a concentration of 0.5mg / ml, and a 1mol / L NaOH aqueous solution for later use;

[0029] 2. According to the mass ratio of GO:FeCl 2 4H 2 O:FeCl 3 ·6H 2 O=1:0.65:0.88 Weigh 65mg FeCl 2 4H 2 O and 88mg FeCl 3 ·6H 2 O, added to 200ml GO aqueous solution, heated in a water bath to 50°C for 10min, added NaOH solution dropwise to adjust the pH of the mixture to 11, and heated the mixture at 70°C for 3h;

[0030] 3. According to the mass ratio of GO: NaBH 4 =1:6 weigh 600mg NaBH 4 Dissolve in 50ml of water, drop into the mixture, and heat at 80°C for 1 hour;

[0031] 4. Alternately wash with deionized water and absolute ethanol until pH = 7, centrifuge or filter, and then vacuum-dry at 60°C to obtain a black powder that is RGO-Fe 3 o 4 composite material.

[0032] The XRD spectrogram of embodiment 1 product sees figure 1 (a). Mix the powder product in Example 1 and solid paraffin evenly according to the mass ratio of 1:1, pre...

Embodiment 2

[0034] 1. Prepare a GO aqueous solution with a concentration of 0.5mg / ml, and a 1mol / L NaOH aqueous solution for later use;

[0035] 2. According to the mass ratio of GO:FeCl 2 4H 2 O:FeCl 3 ·6H 2 O=1:1.29:1.76 Weigh 129mg FeCl 2 4H2 O and 176 mg FeCl 3 ·6H 2 O, added to 200ml GO aqueous solution, heated in a water bath to 50°C for 10min, added NaOH solution dropwise to adjust the pH of the mixture to 11, and heated the mixture at 70°C for 3h;

[0036] 3. According to the mass ratio of GO: NaBH 4 =1:6 weigh 600mg NaBH 4 Dissolve in 50ml of water, drop into the mixture, and heat at 80°C for 1 hour;

[0037] 4. Alternately wash with deionized water and absolute ethanol until pH = 7, centrifuge or filter, and then vacuum-dry at 60°C to obtain a black powder that is RGO-Fe 3 o 4 composite material.

[0038] The XRD spectrum pattern of embodiment 2 product sees figure 1 (b). The powder product in Example 2 was uniformly mixed with solid paraffin at a mass ratio of 1:1 ...

Embodiment 3

[0040] 1. Prepare a GO aqueous solution with a concentration of 0.5mg / ml, and a 1mol / L NaOH aqueous solution for later use;

[0041] 2. According to the mass ratio of GO:FeCl 2 4H 2 O:FeCl 3 ·6H 2 O=1:2.58:3.52 weigh 258mg FeCl 2 4H 2 O and 352 mg FeCl 3 ·6H 2 O, added to 200ml GO aqueous solution, heated in a water bath to 50°C for 10min, added NaOH solution dropwise to adjust the pH of the mixture to 11, and heated the mixture at 70°C for 3h;

[0042] 3. According to the mass ratio of GO: NaBH 4 =1:6 weigh 600mg NaBH 4 Dissolve in 50ml of water, drop into the mixture, and heat at 80°C for 1 hour;

[0043] 4. Alternately wash with deionized water and absolute ethanol until pH = 7, centrifuge or filter, and then vacuum-dry at 60°C to obtain a black powder that is RGO-Fe 3 o 4 composite material.

[0044] The XRD spectrum pattern of embodiment 3 product sees figure 1 (c). The powder product in Example 3 was uniformly mixed with solid paraffin at a mass ratio of 1:...

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Abstract

The invention relates to a method for preparing a reduced graphene oxide / ferroferric oxide nano-grade wave-absorbing material. With the method, the RGO-Fe3O4 composite wave-absorbing material can be easily and rapidly produced with large scale. The RGO-Fe3O4 composite wave-absorbing material is prepared with one step with a simplified co-precipitation method. The preparation method is simple and fast, and assists in realizing large-scale production. The prepared composite material has good wave-absorbing performance. Through the adjustment upon the ratio of RGO and Fe3O4 and the thickness of the composite material, effective absorption of different wave bands can be realized.

Description

technical field [0001] The invention relates to a method for preparing reduced graphene oxide / ferric oxide nanometer wave-absorbing material, and relates to the preparation of a binary composite microwave absorbing material, specifically adopting a simplified co-precipitation method without adding any surfactant and inert Gas protection, one-step preparation of reduced graphene oxide (RGO) / iron tetroxide (Fe 3 o 4 ) Binary composite absorbing material. Background technique [0002] Ferrite has the advantages of high microwave absorption efficiency, wide frequency band, and low cost. It is the earliest practical and most commonly used electromagnetic wave absorber. Researchers at home and abroad are trying to develop new ferrite materials, and one of the important directions is to obtain wave-absorbing materials with excellent performance through compounding. Graphene is a carbonaceous material with a single-layer structure formed by densely packed carbon atoms. Composite...

Claims

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Application Information

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IPC IPC(8): C09K3/00
Inventor 黄英宗蒙赵阳吴海伟邵杰王慎强曲春昊
Owner NORTHWESTERN POLYTECHNICAL UNIV
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