Optimized electromagnetic wave absorption of α -Fe 2 O 3 @MoS 2 nanocomposites with core-shell structure.

Core-shell structures and interfacial polarization are of great significance to meet the diversified requirements of microwave attenuation. Herein, α -Fe ₂ O ₃ @MoS ₂ nanocomposites are fabricated via a simple two-step hydrothermal process, in which MoS ₂ nanosheets as the shell are self-assembled and α -Fe ₂ O ₃ microdrums are used as the core to constitute a special flower-like morphology with core-shell structure. This structure can provide more interface contact to achieve strong interfacial polarization and possibly offer more multiple reflection and scattering of electromagnetic waves. Furthermore, the microwave dissipation performances of α -Fe ₂ O ₃ @MoS ₂ nanocomposites can be significantly improved through construction of core-shell structure and flower-like morphology, controlling the content of α -Fe ₂ O ₃ microdrums and adjusting the filler loading ratios. This work proves that the as-synthesized nanocomposites achieve excellent effective absorption bandwidth and outstanding electromagnetic wave absorption capabilities due to their special interfaces, core-shell structures and good impedance matching conditions. Therefore, α -Fe ₂ O ₃ @MoS ₂ nanocomposites are expected to be a novel and desirable candidate for high-performance electromagnetic wave absorbers.
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