Microwave-assisted hydrothermal synthesis of Fe-doped 1T/2H-MoS2 few-layer nanosheets for efficient electromagnetic wave absorbing

Molybdenum disulfide (MoS2) has been considered as an excellent candidate for microwave absorption applications due to its appropriate electrical conductivity and large area size. However, the absorption efficiency and absorption bandwidth of single-phase MoS2 nanocomposites have been limited due to the weak electrical conductivity and magnetism. This paper proposes a feasible strategy to optimize the electromagnetic properties of MoS2 absorbent by Fe-doping. The MoS2 nanosheets with different Fe concentration have been synthesized a microwave-assisted hydrothermal process. Microstructure characterizations reveal that Fe dopants can facilitate the formation mixed 1T/2H phase MoS2 nanosheets. Owing to the improved permittivity and permeability properties, impedance matching, as well as attenuation characteristics originated from the doping effect and partial phase transformation, the Fe-doped 1T/2H-MoS2 nanosheets exhibit excellent electromagnetic wave absorbing properties. Its maximum reflection loss reaches − 60.03 dB at the matching thickness of 5.65 mm, and the effective absorption bandwidth below − 10 dB is 5.33 GHz. Such novel doping strategy provides a new insight for design and controlling the magneto-dielectric properties of MoS2 nanostructures.