Abstract
Fe 3 O 4 -intercalated reduced graphene oxide (Fe 3 O 4 -rGO) nanocomposites were synthesized by an in situ reduction process. The results of XRD and XPS analyses suggested the successful formation of a Fe 3 O 4 crystal phase within the rGO sheets. The SEM and TEM images demonstrated that Fe 3 O 4 was flaky and was inserted stably within the rGO layers to form a typical sandwich-like structure. The hysteresis loops revealed the superparamagnetic behavior of the Fe 3 O 4 -rGO nanocomposites at room temperature. The electromagnetic parameters revealed that Fe 3 O 4 -rGO nanocomposites exhibited multiple dielectric relaxation and magnetic resonance. The reflection loss revealed that the maximum loss was −49.53 dB at 6.32 GHz for a thickness of 3.4 mm while the highest effective absorption bandwidth was 2.96 GHz.
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