Issue 41, 2018, Issue in Progress
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RSC Advances

Facile synthesis and microwave absorption investigation of activated carbon@Fe3O4 composites in the low frequency band

Pengfei Yin, ORCID logo a   Yu Deng,*b   Limin Zhang,c   Ning Li,c   Xing Feng,a   Jian Wanga  and  Yi Zhanga  

* Corresponding authors

a College of Science, Sichuan Agricultural University, Ya'an 625014, P. R. China

b College of Water Conservancy and Hydropower Engineering, Sichuan Agricultural University, Ya'an 625014, P. R. China
E-mail: yudeng21@sicau.edu.cn

c Key Laboratory of Space Applied Physics and Chemistry (Ministry of Education), School of Science, Northwestern Polytechnical University, Xi'an 710072, P. R. China

Abstract

Activated carbon@Fe3O4 composites with good electromagnetic wave absorption performances in the low frequency range were synthesized via the hydrothermal method. The crystal structure, microstructure, magnetization properties, frequency-dependent electromagnetic properties and microwave absorption properties of the as-prepared composites were characterized via XRD, VSM, SEM, TEM and VNA, respectively. The results indicated that the electromagnetic wave absorption performance of the composites can be adjusted through the addition of activated carbon. A suitable loading content of Fe3O4 NPs on activated carbon can also enhance the microwave absorption performance of the composites. The synergy of dielectric and magnetic loss is the main electromagnetic wave absorption mechanism, and the maximum RL of −10.08 dB at 1.75 GHz with a −5 dB bandwidth over the frequency range of 1.55 GHz (1.07–2.62 GHz) is obtained when the percentage of Fe3O4 NPs and the thickness of the composites are 74 wt% and 5 mm, respectively. Hence, the composite reported in this study can be used as a promising microwave absorbing material in the low frequency range of 0.5–3 GHz.

Graphical abstract: Facile synthesis and microwave absorption investigation of activated carbon@Fe3O4 composites in the low frequency band

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Article information

DOI
https://doi.org/10.1039/C8RA04141E
Article type
Paper
Submitted
15 May 2018
Accepted
11 Jun 2018
First published
25 Jun 2018
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2018,8, 23048-23057

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Facile synthesis and microwave absorption investigation of activated carbon@Fe3O4 composites in the low frequency band

P. Yin, Y. Deng, L. Zhang, N. Li, X. Feng, J. Wang and Y. Zhang, RSC Adv., 2018, 8, 23048 DOI: 10.1039/C8RA04141E

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