Tunable dielectric properties and electromagnetic wave absorbing performance of MoS2/Fe3O4/PANI composite

Molybdenum disulfide (MoS 2 ) has been considered as an excellent candidate for microwave absorption applications due to its appropriate electrical conductivity and large area size. In this study, the MoS 2 /Fe 3 O 4 /PANI nanocomposite (MFP), a MoS 2 based ternary composite absorbing material with multiple heterostructures is prepared through composite with ferroferric oxide (Fe 3 O 4 ) and polyaniline (PANI) and exhibits excellent microwave absorbing performance. Owning satisfactory impedance matching and multiple interfacial polarization, the minimum reflection loss of MFP can reach −50.3 dB at a thickness of 2.6 mm, and the effective absorption bandwidth is 5.1 GHz. Meanwhile, the whole X and Ku-band absorption can also be achieved with specific MoS 2 loading at an optimized thickness. The ternary composite enhances the ability of electromagnetic waves attenuation by reducing dielectric constant and improving impedance matching, which is a novel medium adjusting strategy to provide a new insight for MoS 2 in the field of microwave absorption and national defense security stealth technology.