FeNi₃nanoalloy decorated on 3D architecture composite of reduced graphene oxide/molybdenum disulfide giving excellent electromagnetic wave absorption properties

High-performance electromagnetic wave absorption materials with strong absorption intensity, broad bandwidth, low density and thin thickness can be widely applied in the civil and military areas. In this paper, FeNi₃nanoalloy decorated on 3D architecture composite of reduced graphene oxide/molybdenum disulfide (FeNi₃@RGO/MoS₂) was prepared by two-step of hydrothermal reaction. RGO/MoS₂composite was synthesized by a hydrothermal process and then FeNi₃nanoalloy was decorated on the RGO/MoS₂nanosheets via the second hydrothermal process. Electromagnetic wave absorption performances of FeNi₃@RGO/MoS₂composite with different filler loadings in paraffin matrix were investigated for the first time and it improves significantly with the increase of filler loading. The maximum absorption bandwidth is 4.72 GHz with the thickness of 2.0 mm and the corresponding reflection loss value is −30.39 dB when the filler loading of FeNi₃@RGO/MoS₂is 40%. The ternary composite possesses dielectric loss and magnetic loss in the testing frequency region, magnetic loss plays an important role in low-frequency region and dielectric loss occupies the main part in the high-frequency area.