Regulation of impedance matching feature and electronic structure of4 nitrogen-doped carbon nanotubes for high-performance electromagnetic wave absorption

Fenghui Cao ¹Jia Xu ²Minjie Liu ²Feng Yan ²Qiuyun Ouyang ²Xitian Zhang ³Xiaoli Zhang ⁴Yujin Chen⁵

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作者信息

1. Key Laboratory of In-Fiber Integrated Optics,College of Physics and Optoelectronic Engineering,Harbin Engineering University,Harbin 150001,China;School of Mechatronic Engineering,Daqing Normal University,Daqing 163712,China
2. Key Laboratory of In-Fiber Integrated Optics,College of Physics and Optoelectronic Engineering,Harbin Engineering University,Harbin 150001,China
3. Key Laboratory for Photonic and Electronic Bandgap Materials,Ministry of Education,and School of Physics and Electronic Engineering,Harbin Normal University,Harbin 150025,China
4. School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China
5. Key Laboratory of In-Fiber Integrated Optics,College of Physics and Optoelectronic Engineering,Harbin Engineering University,Harbin 150001,China;School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China
折叠

Abstract

In this study,we developed a facile method to fabricate three-dimensional(3D)structures composed of FeNi alloy nanoparticles encapsulated in N-doped carbon nanotubes that grafted on the SiO2 spheres(FexNiy@NCNT@SiO2)for electromagnetic wave(EMW)absorption.The experimental results suggest that the impedance matching characteristic can be tuned by the introduction of SiO2 spheres in the 3D struc-ture.Density functional theory(DFT)calculations showed that the introduction of Ni improved the polar-ization and conductive losses of the FexNiy@NCNT@SiO2.As a result,the optimal 3D structure exhibits ex-cellent EMW absorption property with a reflection loss and effective absorption bandwidth are-49.39 dB and 4.32 GHz,respectively,even though the matching thickness is only 1.6 mm,superior to most mag-netic carbon-based composites.Thus,our current approach opens up an effective way to the development of low-cost,high-performance EMW absorbers.

Key words

FeNi alloy/CNTs/Silica/Nitrogen doping/Electromagnetic wave absorption

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基金项目

This work was financially supported by the National Natu-ral Science Foundation China(Grant 51972077)

Fun-damental Research Funds for the Central Universities(3072020CF2518)

Fun-damental Research Funds for the Central Universities(3072020CFT2505)

Fun-damental Research Funds for the Central Universities(3072021CFT2506)

Fun-damental Research Funds for the Central Universities(3072021CF2523)

Fun-damental Research Funds for the Central Universities(3072021CF2524)

Heilongjiang Touyan In-novation Team Program,Natural Science Foundation of Daqing Normal University(Grant 19ZR05)

Daqing City Directive Science and Technology Plan Project(Grant zd-2020-04)

and Heilongjiang Provincial Natural Resources Foundation Joint Guide Project(Grant LH2020E098)

出版年

2022

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI

影响因子：0.657

ISSN：1005-0302

参考文献量64

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