Journal
RSC ADVANCES
Volume 7, Issue 41, Pages 25773-25779Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra03215c
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Funding
- National Natural Science Foundation of China [51372131, 51232005, 51602171]
- Beijing Nova Program [Z161100004916099]
- Tsinghua University Initiative Scientific Research Program
- Beijing Municipal Science and Technology Commission [D14110300240000]
- Key Laboratory of Advanced Materials of Ministry of Education [2016AML02]
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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 honeycom-blike 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.
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