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CeO2/MWCNTs composite and preparation method and application thereof

A composite material and composite material technology, applied in the field of CeO2/MWCNTs composite material and its preparation, to achieve high theoretical and practical value, easy access to raw materials, and the effect of reaction control

Inactive Publication Date: 2017-11-24
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned preparation methods have the following problems to varying degrees: surfactants are added during the preparation process, and CeO 2 deposited on the surface of carbon nanotubes

Method used

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  • CeO2/MWCNTs composite and preparation method and application thereof
  • CeO2/MWCNTs composite and preparation method and application thereof
  • CeO2/MWCNTs composite and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] a CeO 2 / MWCNTs composite material, the CeO in the composite material 2 Nanoparticles grow disorderly on the surface and inside of MWCNTs.

[0044] CeO as claimed in claim 1 2 The preparation method of / MWCNTs composite material is characterized in that: the method steps are as follows:

[0045] 1) Pretreatment of multi-walled carbon nanotubes: add MWCNTs and concentrated nitric acid to a 250mL three-necked flask in sequence, and react at 140°C for 6 hours. Vacuum drying for 24 hours to obtain MWCNTs acidified with concentrated nitric acid;

[0046] 2) CeO 2 Preparation of / MWCNTs composite material: Add MWCNTs to deionized water, ultrasonically disperse for 2 hours, then add cerium nitrate hexahydrate, then slowly add concentrated ammonia water to adjust the pH=10-11, transfer the mixed solution to the reaction kettle, at 180 ℃ for 24 hours, after post-treatment to obtain ceria / multi-walled carbon nanotube composite material.

[0047] The mass volume ratio of MWC...

Embodiment 2

[0059] a CeO 2 / MWCNTs composite material, the CeO in the composite material 2 Nanoparticles grow disorderly on the surface and inside of MWCNTs.

[0060] CeO as claimed in claim 1 2 The preparation method of / MWCNTs composite material is characterized in that: the method steps are as follows:

[0061] 1) Pretreatment of multi-walled carbon nanotubes: Add MWCNTs and concentrated nitric acid in sequence to a 250mL three-necked flask, and react at 140°C for 12 hours. Vacuum drying for 24 hours to obtain MWCNTs acidified with concentrated nitric acid;

[0062] 2) CeO 2 Preparation of / MWCNTs composite material: Add MWCNTs to deionized water, ultrasonically disperse for 2 hours, then add cerium nitrate hexahydrate, then slowly add concentrated ammonia water to adjust the pH=10-11, transfer the mixed solution to the reaction kettle, at 180 ℃ for 24 hours, after post-treatment to obtain ceria / multi-walled carbon nanotube composite material.

[0063] The mass volume ratio of MW...

Embodiment 3

[0069] a CeO2 / MWCNTs composite material, the CeO in the composite material 2 Nanoparticles grow disorderly on the surface and inside of MWCNTs.

[0070] CeO as claimed in claim 1 2 The preparation method of / MWCNTs composite material is characterized in that: the method steps are as follows:

[0071] 1) Pretreatment of multi-walled carbon nanotubes: add MWCNTs and concentrated nitric acid to a 250mL three-neck flask in sequence, and react at 140°C for 8 hours. Vacuum drying for 24 hours to obtain MWCNTs acidified with concentrated nitric acid;

[0072] 2) CeO 2 Preparation of / MWCNTs composite material: Add MWCNTs to deionized water, ultrasonically disperse for 2 hours, then add cerium nitrate hexahydrate, then slowly add concentrated ammonia water to adjust pH = 10, transfer the mixed solution to the reaction kettle, and react at 180°C After 24 hours, the ceria / multi-walled carbon nanotube composite material is obtained after post-treatment.

[0073] The mass volume rat...

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Abstract

The invention discloses a CeO2 / MWCNTs composite and a preparation method and application thereof. The CeO2 / MWCNTs composite is synthesized by a simple chemical method, and CeO2 nano-particles orderlessly grow on the surfaces of MWCNTs and in MWCNTs. By adoption of a hydrothermal method, no surfactant is added; a traditional electroplating or chemical plating method is avoided; the pollution is small; and the preparation method is simple and convenient, green and environment-friendly and easy for reaction control, does not need expensive equipment, and can be used for industrial production.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a CeO 2 / MWCNTs composites and their preparation methods and applications. Background technique [0002] In recent years, with the rapid development of the electronics industry, electromagnetic pollution has become increasingly serious, and absorbing materials have played a vital role in the field of electromagnetic pollution protection. At the same time, absorbing materials also play an extremely important role in the fields of realizing radar stealth of military equipment, reducing electromagnetic interference, and ensuring information security. Absorbing materials (microwave absorbing materials, electromagnetic wave attenuating materials or radar stealth materials) can effectively reduce the reflection of electromagnetic waves on the surface of objects, and at the same time effectively attenuate the electromagnetic waves incident into the material. Based on the above r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00
CPCC09K3/00
Inventor 邢宏龙王欢王磊刘叶贾涵枭
Owner ANHUI UNIV OF SCI & TECH
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