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Preparation method of Fe-doped stannic oxide/reduced graphene oxide nanometer composite wave absorption material

A nano-composite material and tin dioxide technology, which is applied in the field of electromagnetic composite materials, can solve the problems of high density and narrow absorption frequency band, and achieve the effects of enhancing absorption capacity, easy operation and good wave absorption performance.

Active Publication Date: 2019-02-15
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a single SnO 2 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 Fe-doped stannic oxide/reduced graphene oxide nanometer composite wave absorption material
  • Preparation method of Fe-doped stannic oxide/reduced graphene oxide nanometer composite wave absorption material
  • Preparation method of Fe-doped stannic oxide/reduced graphene oxide nanometer composite wave absorption material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Take a 100mL beaker, add 30mL deionized water, add 20mg graphite oxide while stirring, sonicate for 30min, stir vigorously for 2h, and prepare a graphene oxide (GO) aqueous dispersion with a concentration of 0.67mg / mL;

[0032] 2. Add 1.550g tin tetrachloride pentahydrate (SnCl 4 ·5H 2 0), vigorously stirred for 30min to make it dissolve completely;

[0033] 3. Add ammonia water drop by drop to adjust the pH of the mixed dispersion to 10, then stir vigorously for 15 minutes;

[0034] 4. Transfer the mixed dispersion to a reaction kettle with a volume of 50mL, and conduct a hydrothermal reaction at 160°C for 18h;

[0035] 5. After the reaction, cool to room temperature, repeat centrifugation, and wash with deionized water several times to make the pH of the product reach neutral;

[0036] 6. Transfer the product to a vacuum drying oven, dry at 55°C for 24 hours, and grind to obtain the final product, which is designated as S1.

[0037] The powder product and paraf...

Embodiment 2

[0039] 1. Take a 100mL beaker, add 30mL deionized water, add 20mg graphite oxide while stirring, sonicate for 30min, stir vigorously for 2h, and prepare a graphene oxide (GO) aqueous dispersion with a concentration of 0.67mg / mL;

[0040] 2. Add 1.550g tin tetrachloride pentahydrate (SnCl 4 ·5H 2 O), after stirring evenly, add 0.095g ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) Stir vigorously for 30 min to dissolve completely. Among them, iron ions (Fe 3+ ) accounted for Fe 3+ and tin ions (Sn 4 + ) mole percent 5mol.%;

[0041] 3. Add ammonia water drop by drop to adjust the pH of the mixed dispersion to 10, then stir vigorously for 15 minutes;

[0042] 4. Transfer the mixed dispersion to a reaction kettle with a volume of 50mL, and conduct a hydrothermal reaction at 160°C for 18h;

[0043] 5. After the reaction, cool to room temperature, repeat centrifugation, and wash with deionized water several times to make the pH of the product reach neutral;

[0044]6. Tr...

Embodiment 3

[0047] 1. Take a 100mL beaker, add 30mL deionized water, add 20mg graphite oxide while stirring, sonicate for 30min, stir vigorously for 2h, and prepare a graphene oxide (GO) aqueous dispersion with a concentration of 0.67mg / mL;

[0048] 2. Add 1.550g tin tetrachloride pentahydrate (SnCl 4 ·5H 2 O), after stirring evenly, add 0.190g ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) Stir vigorously for 30 min to dissolve completely. Among them, iron ions (Fe 3+ ) accounted for Fe 3+ and tin ions (Sn 4 + ) mole percent 10mol.%;

[0049] 3. Add ammonia water drop by drop to adjust the pH of the mixed dispersion to 10, then stir vigorously for 15 minutes;

[0050] 4. Transfer the mixed dispersion to a reaction kettle with a volume of 50mL, and conduct a hydrothermal reaction at 160°C for 18h;

[0051] 5. After the reaction, cool to room temperature, repeat centrifugation, and wash with deionized water several times to make the pH of the product reach neutral;

[0052] 6. ...

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Abstract

The invention discloses a Fe-doped stannic oxide / reduced graphene oxide (Fe-SnO2 / RGO) nanometer composite wave absorption material and a preparation method thereof. The Fe-SnO2 / RGO binary composite material is prepared by taking graphene oxide (GO), tin tetrachloride pentahydrate and iron nitrate nonahydrate as a precursor and by one-step hydrothermal reaction. The preparation method is green andenvironmental-friendly, no any harmful side product is generated, and the preparation process is simple and is low in cost. The prepared binary nanometer composite wave absorption material has the characteristics of high absorption strength, dual-band (C and Ku bands) absorption, low density and the like; and by adjusting the content of Fe<3+> doped in the composite material and the thickness of awave absorption coating layer, effective absorption of electromagnetic waves at different bands can be achieved, and the preparation method has important application value in the field of electromagnetic absorption and electromagnetic shielding.

Description

technical field [0001] The invention belongs to the field of electromagnetic composite materials, and in particular relates to a preparation method of a reduced graphene oxide-based nanocomposite wave-absorbing material. technical background [0002] With the increasingly serious problems of electromagnetic interference and electromagnetic pollution, the development of electromagnetic wave absorbing materials has become a research hotspot in the field of functional materials. However, traditional electromagnetic wave absorbing materials, such as ferrite, metal micropowder, and silicon carbide, usually have the disadvantages of narrow absorption band and high density, which limits their practical applications. Therefore, the development of new electromagnetic wave absorbing materials with "thin thickness, wide absorption frequency band, light weight, and high electromagnetic wave absorption intensity" has important application prospects. [0003] Nanomaterials have the chara...

Claims

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Application Information

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IPC IPC(8): H05K9/00C01B32/184C01B32/194C01G19/02B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B32/184C01B32/194C01G19/02C01P2002/72C01P2002/85C01P2004/04C01P2004/80H05K9/0081
Inventor 疏瑞文张佳宾马艳培谢艳赵杰成孙焰丽
Owner ANHUI UNIV OF SCI & TECH
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