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

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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.

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Acknowledgements

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

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  1. Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing, 100875, China

    Jingshen Xu, Na Lu & Genban Sun

  2. Center for Advanced Materials Research, Beijing Normal University, Zhuhai, 519087, China

    Mengwei Yuan & Genban Sun

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

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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 Res. 16, 5676–5684 (2023). https://doi.org/10.1007/s12274-022-5178-5

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