Reduced Graphene Oxide/FeO/Polyaniline Ternary Composites as a Superior Microwave Absorber in the Shielding of Electromagnetic Pollution.

The present work is focused on fabrication of reduced graphene oxide/iron(II/III) oxide/polyaniline (RGO/FeO/PANI) ternary composite by a hydrothermal method, its characterization, and application in the development of a high microwave absorbing shielding material. The RGO/FeO/PANI composite showed dramatic enhancement of dielectric loss and magnetic loss compared to FeO/PANI and RGO/FeO binary composites. This is ascribed to the embedment of more heterostructure phases. As a result, RGO/FeO/PANI showed remarkably high SE (∼28 dB) through the absorption dominant mechanism. Our findings also showed maximum of FeO/PANI, RGO/FeO, and RGO/FeO/PANI in the range of 2-8 GHz corresponding to -25 to -35, -40 to -46, and approximately -64 dB, respectively. This is in all probability due to the good impedance matching between permittivity/permeability and dielectric/magnetic losses.