Reduced Graphene Oxide/Fe3O4/Polyaniline Ternary Composites as a Superior Microwave Absorber in the Shielding of Electromagnetic Pollution

Rakesh Manna; Suneel Kumar Srivastava

doi:10.1021/acsomega.1c00382

Reduced Graphene Oxide/Fe₃O₄/Polyaniline Ternary Composites as a Superior Microwave Absorber in the Shielding of Electromagnetic Pollution

ACS Omega. 2021 Mar 22;6(13):9164-9175. doi: 10.1021/acsomega.1c00382. eCollection 2021 Apr 6.

Authors

Rakesh Manna¹, Suneel Kumar Srivastava¹

Affiliation

¹ Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India.

Abstract

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 SE_T (∼28 dB) through the absorption dominant mechanism. Our findings also showed maximum R _L 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.