Synthesis of metallic-phase MoS2 nanospheres with high microwave absorbing performance

Metallic phase of MoS2 (M−MoS2) is a metastable state that does not occur naturally. To the best of our knowledge, there has been no prior preparation of pure and stable M−MoS2 nanospheres. The high purity, uniform, and stable two-dimensional M−MoS2 nanospheres were synthesized in ethyl alcohol through a hydrothermal reaction in this study. The as-prepared M−MoS2 demonstrates excellent microwave absorbing performance (MAP), with a minimum reflection loss (RL) of −39.88 dB at a thickness of 1.3 mm and an effective attenuation bandwidth (RL < -10 dB) up to 8.31 GHz (9.6875–18.0 GHz). These results suggest that M−MoS2 is a promising and cost-effective option for microwave absorption applications.