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Nano Research 2023, 16(4): 5676-5684 https://doi.org/10.1007/s12274-022-5178-5
Research Article | Issue | Published: 05 December 2022

Rational design of hollow rice-grained α-Fe2O3/carbon nanofibers with optimized impedance matching for electromagnetic wave absorption enhanced

Show Author's Information Jingshen Xu1,  Na Lu1,  Mengwei Yuan2,  Genban Sun1,2( )
Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China
Center for Advanced Materials Research, Beijing Normal University, Zhuhai 519087, China
Keywords:
carbon nanofibers, impedance matching, electromagnetic wave absorption, Fe-based
Topics:
Nanocomposites
Cite this article:
Xu J, Lu N, Yuan M, et al. Rational design of hollow rice-grained α-Fe2O3/carbon nanofibers with optimized impedance matching for electromagnetic wave absorption enhanced. Nano Research, 2023, 16(4): 5676-5684. https://doi.org/10.1007/s12274-022-5178-5
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Abstract Full text Electronic supplementary material About this article

Electromagnetic wave absorption materials are widely used in electronic equipment and military fields. However, high cost and complex preparation processes become a major obstacle in promoting popularization in the civil field. To solve the problems above, researchers have made great efforts to develop Fe-based carbon composites. However, most of the typical composites require a high filling ratio while achieving excellent properties. Therefore, in this study, carbon nanofibers (CNFs) combined with the hollow rice-grained α-Fe2O3 nanoparticles were prepared by the in-situ transformation method. The rational microstructure design provided a solution for reducing the filling ratio, optimizing impedance matching, and improving electromagnetic wave absorption performance. The strong reflection loss value (−38.1 dB) and broad effective absorption bandwidth (4.6 GHz) for Fe2O3/CNFs composites were achieved with a low filling ratio (20 wt.%), and the analysis of electromagnetic parameters validated that the microstructure of Fe2O3/CNFs plays a crucial role in the performance improvement. With the optimized impedance matching and simple preparation method, Fe2O3/CNFs have broad application prospects in electromagnetic wave absorption.


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Abstract
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Electronic supplementary material
About this article

Rational design of hollow rice-grained α-Fe2O3/carbon nanofibers with optimized impedance matching for electromagnetic wave absorption enhanced

Show Author's information Jingshen Xu1, Na Lu1, Mengwei Yuan2, Genban Sun1,2( )
Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China
Center for Advanced Materials Research, Beijing Normal University, Zhuhai 519087, China

Abstract

Electromagnetic wave absorption materials are widely used in electronic equipment and military fields. However, high cost and complex preparation processes become a major obstacle in promoting popularization in the civil field. To solve the problems above, researchers have made great efforts to develop Fe-based carbon composites. However, most of the typical composites require a high filling ratio while achieving excellent properties. Therefore, in this study, carbon nanofibers (CNFs) combined with the hollow rice-grained α-Fe2O3 nanoparticles were prepared by the in-situ transformation method. The rational microstructure design provided a solution for reducing the filling ratio, optimizing impedance matching, and improving electromagnetic wave absorption performance. The strong reflection loss value (−38.1 dB) and broad effective absorption bandwidth (4.6 GHz) for Fe2O3/CNFs composites were achieved with a low filling ratio (20 wt.%), and the analysis of electromagnetic parameters validated that the microstructure of Fe2O3/CNFs plays a crucial role in the performance improvement. With the optimized impedance matching and simple preparation method, Fe2O3/CNFs have broad application prospects in electromagnetic wave absorption.

Keywords: carbon nanofibers, impedance matching, electromagnetic wave absorption, Fe-based

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Acknowledgements

Publication history

Received: 08 August 2022
Revised: 12 September 2022
Accepted: 10 October 2022
Published: 05 December 2022
Issue date: April 2023

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© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

This work was supported by the National Natural Science Foundations of China (No. 21771024 and 22271018).

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