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 3 2017
Accepted
03 5 2017
First published
12 5 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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