Hierarchical core-shell Fe3O4@C@MoS2 composites synergistically enhance microwave absorption

Controlling the structure and morphology of multi-component composites has received extensive attention in the application based on microwave absorption. In this work, ternary complex Fe3O4@C@MoS2 was prepared with Fe3O4@C as core and the flake MoS2 as the shell. The composition, morphology, and structure of those composites were investigated. The related electromagnetic parameters of the asprepared absorber were calculated and processed to explore the store and lose ability toward to the electromagnetic wave energy. Results showed that the maximum reflection loss (RL) of the Fe3O4@C@MoS2 cloud reach -51.6 dB, and the effective absorption bandwidth (RL <= -10 dB) was 6.2 GHz (9.4-15.6 GHz), corresponding to a low loading mass of 20%. These excellent electromagnetic wave absorption properties may be attributed to the synergetic effects between the hierarchical structure and multiple component effects, which significantly enhanced the attenuation behavior. (C) 2019 Elsevier B.V. All rights reserved.