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Journal of Materials Science: Materials in Electronics

Published in:

01-02-2024

Enhanced electromagnetic wave absorption performance of rGO composites modified with atomically dispersed bi-metalic znic/cobalt sites

Authors: Jiahao He, Guoxin Zhang, Yiyao Xiao, Chao Wang, Ningning Song

Published in: Journal of Materials Science: Materials in Electronics | Issue 5/2024

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Abstract

An effective strategy for improving microwave absorbing performance was proposed in atomically dispersed bimetallic carbon-based composite materials. The atomically dispersed ZnCo-NC@rGO composites were synthesized though metal-mediated formamide (FA) condensation and carbonization. By adjusting the Co/Zn sites loading, the electromagnetic parameters and absorption performance could be effectively optimized. With the Co/Zn ratio of around 0.01, the minimum reflection loss (RL_min) reached − 26.63 dB at absorbing thickness of 1.50 mm, and the maximum effective absorption bandwidth (EAB, RL < − 10 dB) was up to 4.52 GHz (12.78–17.30 GHz) at absorbing thickness of 1.60 mm, covering almost the Ku band. A stronger RL_min of − 59.63 dB was obtained with a thickness of 4.70 mm. Different loading of atomically dispersed metal sites induces variations in metal center and ligand structure. This endows ZnCo-NC@rGO excellent impedance matching and synergistic electromagnetic loss effects. In addition, the maximum radar cross section (RCS) reduction value was up to 26.94 dB m² at a scattering angle of 0°. This study points out a feasible path for the fabrication of carbon-based ultralight synergistic absorbers.

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Title: Enhanced electromagnetic wave absorption performance of rGO composites modified with atomically dispersed bi-metalic znic/cobalt sites
Authors: Jiahao He
Guoxin Zhang
Yiyao Xiao
Chao Wang
Ningning Song
Publication date: 01-02-2024
Publisher: Springer US
Published in: Journal of Materials Science: Materials in Electronics / Issue 5/2024
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI: https://doi.org/10.1007/s10854-024-12080-y

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