Design of core–shell structure NC@MoS₂ hierarchical nanotubes as high-performance electromagnetic wave absorber

Using MnO₂ nanowires as a template and coating with polydopamine, the MoS₂ nanosheets are uniformly grown on the surface and the core–shell structure MnO₂@NC@MoS₂ nanowires are obtained after annealing. By etching and removing the MnO₂ nanowires template with acid solution, NC@MoS₂ wave absorber with tubular hollow structure is obtained. The design of the core–shell structure, the growth of MoS₂ nanosheets, the existence of heterogeneous interfaces and the construction of tubular hollow structures effectively enhance the microwave absorption performance of NC@MoS₂. The minimum reflection loss (RL_min) is reduced and the Effective absorption bandwidth (EAB) is broadened. Finally, the NC@MoS₂ nanotube absorber has a RL_min of −52.56 dB, and the EAB is 6.0 GHz. As an efficient lightweight microwave absorber, NC@MoS₂ has potential value in the synthesis and application of new composite microwave absorbing materials.