Abstract
Enhancing polarization as an effective strategy has attracted wide attention to improve electromagnetic wave absorption performance. In this work, a simple self-template multiple oxidation–etching method is used to prepare the fishing-net-like yolk–shell MnO2@MWCNTs (MYS@MWCNTs) absorber. The structural effects of MYS@MWCNTs and multi-walled carbon nanotube (MWCNTs) dispersion on the microwave absorption properties are investigated in detail. Related SEM and TEM images showed that the MWCNTs disappeared uniformly in MYS@MWCNTs after adjusting the PVP dispersant, thereby weakening the adverse influence of skin effect on impedance matching. One-dimensional MWCNTs penetrated through MnO2 yolk–shell (MYS) microsphere and formed unique fishing-net-like conductive network PVP-optimized MYS@MWCNTs with enhanced impedance matching. MYS@MWCNTs-2 obtains excellent microwave absorption performance with a minimum reflection loss (RLmin) of -52.8 dB at 3.76 GHz because of interface polarization, dipole polarization, and enhanced conductive loss. Therefore, the as-prepared MYS@MWCNTs has potential applications in the field of electromagnetic wave absorption.
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The data that support the findings of this study are available from the corresponding author upon reasonable request.
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Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (Grant Nos.51477002 and 51707003), the University Synergy Innovation Program of Anhui Province (GXXT-2019-028).
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The contributions of all authors to this manuscript are as follows: HX: funding acquisition, project administration, resources, supervision, reviewing, and editing. HJ, WC: conceptualization, methodology, validation, writing, and editing. XJ: validation, writing.
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Xing, H., Jia, H., Chen, W. et al. Fishing-net-like conductive network built by multi-walled carbon nanotubes and yolk–shell MnO2 with enhanced electromagnetic wave polarized absorption. J Mater Sci: Mater Electron 34, 529 (2023). https://doi.org/10.1007/s10854-022-09789-z
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DOI: https://doi.org/10.1007/s10854-022-09789-z