Impact of morphology and dielectric property on the microwave absorbing performance of MoS₂-based materials

Molybdenum disulfide (MoS₂), as a significant microwave absorption materials, has been widely reported. However, it is unclear and insufficient about its microwave absorption mechanism. In this work, a series of MoS₂-based materials with different morphology, including MoS₂ nanosheets (MoS₂-NS), hierarchical MoS₂ (H-MoS₂) microspheres, hollow hierarchical MoS₂ (HH-MoS₂) microspheres and hydrangea-like MoS₂/C (MoS₂/C) microspheres, were synthesized via hydrothermal reaction. More importantly, the microwave absorption mechanism and the dielectric properties as well as microwave absorption performance (MAP) were systemically studied. The results indicated that MoS₂/C exhibited eminent dielectric properties and MAP, which resulted from the unique structure and component. The minimum reflection loss (RL) value of MoS₂/C microspheres/wax with 30 wt% loading is −44.67 dB at the thickness of 1.4 mm, and the corresponding bandwidth with effective attenuation (RL < -10 dB) is up to 3.32 GHz (11.7–15.02 GHz).