Preparation of Polyaniline@MoS 2 @Fe 3 O 4 Nanowires with a Wide Band and Small Thickness toward Enhancement in Microwave Absorption

It is well-known that the absorbing property of materials is related to the microstructure and can be enhanced by magnetic nanoparticles coating. However, the mechanism is still unclear that the magnetic coating structure plays an important role in the microwave absorption behavior. Hence, a novel kind of absorber with efficient performance and relatively clear enhancement mechanism is very necessary. To solve these problems, polyaniline@MoS 2 nanowires (PANI@MoS 2 NW S ) and a series of polyaniline@MoS 2 @Fe 3 O 4 nanowires (PANI@MoS 2 @Fe 3 O 4 NW S ) with hierarchical structure were successfully prepared by in situ polymerization and versatile hydrothermal reactions and investigated in microwave absorption. The results reveal that compared with the articles related to MoS 2 -based composites, the as-prepared PANI@MoS 2 @Fe 3 O 4 NW S (e 2 ) displays the widest absorption frequency range (6.48 GHz) and strong absorption (−49.7 dB at a thickness of 1.3 mm), and the excellent MAP can be interpreted by optimizing impedance matching and simultaneously inhibiting skin effect rather than only focusing on magnetic loss.