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Enhanced microwave-absorption with carbon-encapsulated Fe-Co particles on reduced graphene oxide nanosheets with nanoscale-holes in the basal plane

Author:
Li, Suping, Huang, Ying, Ling, Ding, Zhang, Na, Zong, Meng, Qin, Xiulan, Liu, Panbo
Source:
Journal of colloid and interface science 2019 v.544 pp. 188-197
ISSN:
0021-9797
Subject:
Raman spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, absorption, alloys, carbon, graphene oxide, nanosheets, scanning electron microscopy, transmission electron microscopy
Abstract:
In this study, an Fe-Co alloy is coated with carbon and decorated on a holey reduced graphene oxide nanosheet (FeCo@C/HRGO) composite. The structure is synthesized using liquid-phase reduction and hydrothermal processes followed by high-temperature calcination. The FeCo@C/HRGO composite is identified and characterized using XRD, XPS, Raman spectroscopy, TEM, and SEM. This novel composite exhibits excellent electromagnetic-wave absorption properties. The maximum reflection loss for FeCo@C/HRGO reaches −76.6 dB at 16.64 GHz with a thickness of 1.7 mm. The RL below −10 dB reaches 14.32 GHz for a thickness of 1.7–5.0 mm. This confirms that microwave absorption of FeCo@C can be substantially improved upon decoration with HRGO nanosheets.
Agid:
6306546