Facile synthesis of the three-dimensional flower-like ZnFe₂O₄@MoS₂ composite with heterogeneous interfaces as a...

Lightweight and high-efficiency microwave absorbers are determined by structure and composition of materials. In this research, a novel core-shell ZnFe₂O₄@MoS₂ composite with a flower-like heterostructure was synthesized successfully by a facile hydrothermal process. The unique 3D heterostructure (porous ZnFe₂O₄ and MoS₂ nanosheets as core and outer shells, respectively) endows the synthesized sample with high-efficiency electromagnetic wave absorption performance. The exploration of microwave absorption properties reveals that the maximum reflection loss displayed by the ZnFe₂O₄@MoS₂ composite is up to -61.8 dB at 9.5 GHz with a filler content of 20 wt%, and the corresponding effective bandwidth (R_L exceeding -10 dB) achieves 5.8 GHz (from 7.2 to 13 GHz). The enhanced microwave absorption performance is benefitted by the porous core-shell structure, intense interfacial polarization, multiple reflections, matched impedance and favorable synergistic effect between ZnFe₂O₄ core and MoS₂ shell. Consequently, this strategy provides inspiration for the design of novel microwave absorber with high-performance.