Synthetic 3D flower-like 1T/2H MoS2@CoFe2O4 composites with enhanced microwave absorption performances

Promising microwave absorbers possessing thin, light, wide, strong and high stability characteristics can be achieved by designing its microstructure and manipulating reasonable components. In this work, 3D flower-like MoS2 decorated by hollow CoFe2O4 (CFO) nanospheres was synthesized through a two-step hydrothermal method. Reflection loss values of the synthesized 1 T/2H MoS2@CFO composites were calculated by transmission line theory and the minimum reflection loss value was - 64.66 dB with 50 wt% filler loading at 2.28 mm with corresponding effective absorption bandwidth of 3.59 GHz (9.60-13.19 GHz). Meanwhile, under the same filling ratio, the maximum effective absorption bandwidth of 4.46 GHz ranging from 11.53 to 15.99 GHz was achieved at a thinner matching thickness of 1.94 mm with corresponding reflection loss value of - 46.85 dB. The results showed 1 T/2H MoS2@CFO composites displayed excellent microwave absorption performances which were mainly attributed to the synergistic effect of magnetic loss, dielectric loss, reasonable impedance matching, polarization relaxation and multi-scattering/reflection.