Preparation and electromagnetic wave absorption properties of FeNi3 nanoalloys generated on graphene–polyaniline nanosheets

Abstract

The ternary nanocomposites of rGO–PANI–FeNi₃ were successfully synthesized by combining polymerization with hydrothermal reduction reaction. Graphene and polyaniline unite with FeNi₃ to form ternary composite for the first time and the paraffin composite containing 20 wt% rGO–PANI–FeNi₃ exhibit excellent electromagnetic wave absorption properties. The maximum reflection loss of −43.17 dB is obtained at 6.2 GHz and the absorption bandwidth (<−10 dB) of the reflection loss value can be obtained in the whole frequency range (2.96–18 GHz) with the sample thickness varying from 2.0 to 6.0 mm. The results demonstrate that rGO–PANI–FeNi₃ nanocomposites containing magnetic loss and dielectric loss materials have potential applications in the electromagnetic wave absorbing area and can be widely used in developing electromagnetic wave absorption materials.