Unique 3D ternary porous core-shell Ni@MoS2/RGO composites for broadband electromagnetic wave absorption

The core-shell structure can improve the impedance matching characteristics and dispersibility of microwave absorbers, and has become one of the research hotspots of high-performance absorbers. Herein, a 3D ternary porous core-shell [email protected]2/RGO composite is synthesized by hydrothermal-precipitation, two-step hydrothermal and modified hummers method. Results show that the synthesized ternary composite with 3D porous core-shell structure exhibits remarkable enhancement of microwave absorption. When the matching thickness is 1.83 mm, the minimum reflection loss (RLmin) of the composite is − 64.05 dB at 6.24 GHz, and its effective absorption bandwidth is up to 7.34 GHz (from 10.66 to 18 GHz) at 2.5 mm. It is believed that its good absorbing performance originates from the specific 3D porous core-shell structure design and abundant interface structure. This work provides an efficient and promising strategy for the structural design and interface construction of novel magnetic/electrical composites with efficient microwave absorption.