Multi-interface engineering of FeS₂/C/MoS₂ with core–shell structure for superior microwave absorption performance

Heterojunction and morphology control assume a significant part in adjusting the intrinsic electromagnetic properties of absorbers to acquire outstanding microwave absorption (MA) performance, but this still faces huge challenges. Herein, FeS₂/C/MoS₂ composite with core–shell structure was successfully designed and prepared via a multi-interface engineering. MoS₂ nanosheets with 1T and 2H phases are coated on the outside of FeS₂/C to form a porous interconnected structure that can optimize the impedance matching characteristics and strengthen the interfacial polarization loss capacity. Remarkably, as-fabricated FCM-3 harvests a broad effective absorption bandwidth (EAB) of 5.12 GHz and a minimum reflection loss (RL_min) value of −45.1 dB. Meanwhile, FCM-3 can accomplish a greatest radar cross section (RCS) reduction value of 18.52 dB m² when the detection angle is 0°. Thus, the convenient computer simulation technology (CST) simulations and encouraging accomplishments provide a novel avenue for the further development of efficient and lightweight MA materials.