Reduced Graphene Oxide/Fe3O4/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/Fe3O4/PANI) ternary composite by a hydrothermal method, its characterization, and application in the development of a high microwave absorbing shielding material. The RGO/Fe3O4/PANI composite showed dramatic enhancement of dielectric loss and magnetic loss compared to Fe3O4/PANI and RGO/Fe3O4 binary composites. This is ascribed to the embedment of more heterostructure phases. As a result, RGO/Fe3O4/PANI showed remarkably high SET (similar to 28 dB) through the absorption dominant mechanism. Our findings also showed maximum RL of Fe3O4/PANI, RGO/Fe3O4, and RGO/Fe3O4/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.

Automated summary

The study focuses on the fabrication of RGO/Fe3O4/PANI ternary composite, which shows enhanced dielectric and magnetic loss compared to binary composites, leading to high SET and maximum RL values in the microwave absorbing shielding material.