Facile Synthesis of Magnetic Core-Shell Structures for Tunable Microwave Absorption

Abstract

The rapid development of electronic communication and radar technologies in the 5G era has exacerbated electromagnetic pollution, thereby driving the urgent need for cutting-edge microwave absorption materials. In this study, a novel SnCo/C@MoS2 composite was proposed, and the core-shell structure was synthesized via electrospinning and hydrothermal methods. This composite uniquely integrated the high conductivity and magnetic properties of Sn and Co while capitalizing on the superior dielectric performance of MoS2 nanosheets, which are uniformly grown on carbon nanofibers. This design capitalized on the synergistic effects of a one-dimensional (1D) carbon fibers (CF) framework and two-dimensional (2D) MoS2 nanostructures, enhancing interfacial polarization and multi-loss mechanisms. The SnCo/C@MoS2 exhibited remarkable microwave absorption properties, achieving a minimum reflection loss (RLmin) of -64.27 dB at a thickness of 1.52 mm and an effective absorption bandwidth (EAB) of 5.20 GHz. Moreover, computer simulation technology (CST) demonstrated that SnCo/CNF@MoS2 simulated radar cross-section (RCS) values felled below -20 dB m2. These results demonstrated a substantial improvement in absorption performance compared to the individual SnCo/CNF and MoS2 components. This work underscored the effectiveness of combining 1D and 2D materials to obtain core-shell structures for superior electromagnetic wave (EMW) attenuation.