Efficient and tunable microwave absorbers of the flower-like 1T/2H-MoS2 with hollow nanostructures

The highly efficient three-dimensional (3D) flower-like 1 T/2H-MoS 2 with hollow nanostructures are developed elaborately construct via a simple hydrothermal process. The morphology and dielectric properties of the 1 T/2H-MoS 2 can be achieved to control changes by adjusting the solvent contents of deionized water and absolute ethanol, which can significantly improve the conductivity and impedance matching characteristics. The composites display outstanding microwave absorption properties with a minimum reflection loss (RL min ) value of -56.32 dB at 17.16 GHz with the matching thickness of 1.85 mm. The effective absorption bandwidth is 5.88 GHz with frequency range 11.96-17.84 GHz (covering 98% of Ku-band) when the thickness is 2.13 mm. Therefore, the experimental results show that the reasonable combination of multiphase MoS 2 and hollow structures is beneficial to design of microwave absorbing materials. • A facile strategy is established to construct the highly efficient the 3D flower-like 1 T/2H-MoS 2 hollow nanostructures. • The construction of multiphase MoS 2 and hollow structures is of great significance to meet the diversified requirements of microwave attenuation. • The microwave dissipation performances can be significantly improved through introducing 1T-MoS 2 and carefully adjusting the solvent contents. • A minimum RL of -56.32 dB with 1.85 mm and the maximum effective absorption bandwidth of 5.88 GHz (covering 98% of Ku-band) with 2.13 mm can be obtained.