Preparation and microwave absorbing properties of MoS 2 /biomass carbon composite

In order to solve the problem of low conductivity of MoS2 absorbing material, the MoS2/biomass carbon (BC) composite material was prepared by using shaddock peel (SP) as the raw material, using one-pot hydrothermal and high-temperature calcination methods. The content of MoS2 in the composite material was adjusted by adjusting the content of the initial Mo source and S source. The results of microscopic morphology, structure and electromagnetic parameters show that with the increase of the MoS2 content in the composite material, the scattered distribution of MoS2 on the BC surface changes from flakes to flower-like coatings, and the conductivity and complex permittivity of MoS2/BC composites gradually decrease. By adjusting the ratio of MoS2 to BC, the effective control of the electromagnetic parameters of the MoS2/BC composite material is realized, and its impedance matching characteristics are optimized. The flower-like structure of MoS2 facilitates the multiple reflection/scattering of electromagnetic waves. At the same time, there are abundant interfaces between flower-like MoS2 and BC, which is beneficial to promote interface polarization and enhance the attenuation ability of MoS2/BC composites to electromagnetic waves. The prepared MoS2/BC-0.8 has a minimum reflectance loss (RL) value of -40.1 dB, and an effective absorption bandwidth of up to 5.9 GHz (11.1 GHz-17.0 GHz).