Issue 41, 2017

Three-dimensional reduced graphene oxide powder for efficient microwave absorption in the S-band (2–4 GHz)

Abstract

Efficient absorption in the S-band (2–4 GHz) has been a very challenging task for developing high-performance microwave absorption materials. Three-dimensional reduced graphene oxide (3D-rGO) powders were prepared by using a hydrothermal method and subsequent thermal treatment. It is found that as-prepared 3D-rGO could significantly enhance the electromagnetic wave attenuation in 2–4 GHz. When the content in the paraffin matrix is 4%, the 3D-rGO shows the strongest absorption in S-band, and the absorption will get stronger with the increase of coating thickness. When the thickness is 5 mm, the bandwidth of reflection loss less than −5 dB is in the range of 2.3 to 4.1 GHz, that is, it can almost cover the whole S-band. The excellent microwave absorption could be attributed to the honeycomb-like structures and the strong polarization of 3D-rGO powders. Considering the low density and good corrosion resistance, 3D-rGO powders may serve as an excellent component for the design of lightweight electromagnetic wave absorption coatings.

Graphical abstract: Three-dimensional reduced graphene oxide powder for efficient microwave absorption in the S-band (2–4 GHz)

Supplementary files

Article information

Article type
Paper
Submitted
19 mar 2017
Accepted
03 mai 2017
First published
12 mai 2017
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2017,7, 25773-25779

Three-dimensional reduced graphene oxide powder for efficient microwave absorption in the S-band (2–4 GHz)

S. Fang, D. Huang, R. Lv, Y. Bai, Z. Huang, J. Gu and F. Kang, RSC Adv., 2017, 7, 25773 DOI: 10.1039/C7RA03215C

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