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Preparation method of reduced graphene oxide/manganese ferrite nano-composite wave absorbing material

A nano-composite material, manganese ferrite technology, applied in chemical instruments and methods, other chemical processes, magnetic/electric field shielding, etc. Excellent, improve the effect of interface polarization relaxation

Inactive Publication Date: 2018-09-21
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Spinel manganese ferrite (MnFe 2 o 4 ), has the characteristics of simple preparation, low cost, good chemical stability and high magnetic loss, but a single MnFe 2 o 4 When used as an electromagnetic wave absorbing material, there are problems such as high density and narrow absorption frequency band, which limit its application in the field of electromagnetic wave absorption

Method used

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  • Preparation method of reduced graphene oxide/manganese ferrite nano-composite wave absorbing material
  • Preparation method of reduced graphene oxide/manganese ferrite nano-composite wave absorbing material
  • Preparation method of reduced graphene oxide/manganese ferrite nano-composite wave absorbing material

Examples

Experimental program
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Effect test

Embodiment 1

[0027] 1. Take a 150mL beaker, add 30mL deionized water and 10mL GO water dispersion with a concentration of 2mg / mL. Vigorously stir for 2h, ultrasonic for 30min.

[0028] 2. Add 0.4mmol ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) and 0.2 mmol manganous chloride tetrahydrate (MnCl 2 4H 2 O), vigorously stirred for 90min.

[0029] 3. Add ammonia water drop by drop to adjust the pH of the mixed dispersion to 11, and then vigorously stir for 10 minutes.

[0030] 4. Pour the mixed dispersion into a 50mL reactor, and conduct a hydrothermal reaction at 180°C for 24 hours.

[0031] 5. After the reaction, cool to room temperature, repeat centrifugation and wash with water for several times to make the pH of the product reach neutral.

[0032] 6. Put it into a vacuum drying oven, dry at 40°C for 24 hours, and grind to obtain the final product, which is designated as S1.

[0033] The XRD spectrogram of embodiment 1 product sees figure 1 . The powder product and paraffin in...

Embodiment 2

[0035] 1. Take a 150mL beaker, add 30mL deionized water and 10mL GO water dispersion with a concentration of 2mg / mL. Vigorously stir for 2h, ultrasonic for 30min.

[0036] 2. Add 0.8mmol ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) and 0.4 mmol manganous chloride tetrahydrate (MnCl 2 4H 2 O), vigorously stirred for 90min.

[0037] 3. Add ammonia water drop by drop to adjust the pH of the mixed dispersion to 11, and then vigorously stir for 10 minutes.

[0038] 4. Pour the mixed dispersion into a 50mL reactor, and conduct a hydrothermal reaction at 180°C for 24 hours.

[0039] 5. After the reaction, cool to room temperature, repeat centrifugation and wash with water for several times to make the pH of the product reach neutral.

[0040] 6. Put it into a vacuum drying oven, dry at 40°C for 24 hours, and grind to obtain the final product, which is designated as S2.

[0041] The XRD spectrum pattern of embodiment 2 product sees figure 1 . The powder product and paraff...

Embodiment 3

[0043]1. Take a 150mL beaker, add 30mL deionized water and 10mL GO water dispersion with a concentration of 2mg / mL. Vigorously stir for 2h, ultrasonic for 30min.

[0044] 2. Add 1.2mmol ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) and 0.6 mmol manganous chloride tetrahydrate (MnCl 2 4H 2 O), vigorously stirred for 90min.

[0045] 3. Add ammonia water drop by drop to adjust the pH of the mixed dispersion to 11, and then vigorously stir for 10 minutes.

[0046] 4. Pour the mixed dispersion into a 50mL reactor, and conduct a hydrothermal reaction at 180°C for 24 hours.

[0047] 5. After the reaction, cool to room temperature, repeat centrifugation and wash with water for several times to make the pH of the product reach neutral.

[0048] 6. Put it into a vacuum drying oven, dry at 40°C for 24 hours, and grind to obtain the final product, which is designated as S3.

[0049] The XRD spectrum pattern of embodiment 3 product sees figure 1 . The powder product and paraffi...

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Abstract

The invention discloses a reduced graphene oxide / manganese ferrite (RGO / MnFe2O4) binary nano-composite wave absorbing material and a preparation method thereof. The method comprises the steps that graphene oxide, tetrahydrate manganese dichloride and iron nitrate nonahydrate serve as precursors, and by means of a one-step hydrothermal reaction, the RGO / MnFe2O4 nano-composite material is obtained,wherein the surfaces of RGO slices are loaded with cubic MnFe2O4 nano particles. The preparation method is environmentally friendly, no toxic by-product is generated, the preparation technology is simple, and the cost is low. The prepared nano-composite wave absorbing material is high in electromagnetic wave absorption capacity and wide in absorption band, by adjusting the content of MnFe2O4 in the composite material and the thickness of a coating, effective absorption of electromagnetic waves of different wavebands can be achieved, and the material has the important application value in the field of electromagnetic wave absorption and electromagnetic shielding.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic composite materials, and in particular relates to a preparation method of a reduced graphene oxide-based magnetic nanocomposite wave-absorbing material. Background technique [0002] With the development of electromagnetic stealth technology in the military field and the increasingly serious problems of electromagnetic interference and electromagnetic pollution, electromagnetic wave absorbing materials have gradually become a research hotspot in the field of functional materials. Electromagnetic wave absorbing material refers to a class of materials that can absorb and attenuate incident electromagnetic waves, convert electromagnetic energy into heat or other forms of energy and dissipate it, or make electromagnetic waves disappear due to interference. Traditional electromagnetic wave absorbing materials, such as ferrite, metal micropowder and silicon carbide, usually have the disadvantage...

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 疏瑞文张耕源张佳宾吴越谢艳马艳培孙焰丽
Owner ANHUI UNIV OF SCI & TECH
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