Synthesis and electromagnetic, microwave absorbing properties of polyaniline/graphene oxide/Fe3O4 nanocomposites

Abstract

Ternary composites of polyaniline/graphene oxide/Fe₃O₄ (PANI/GO/Fe₃O₄) were synthesized by a simple method and the electromagnetic absorption properties of the composites were investigated in the paper. The structures of the composites were characterized with Fourier-transform infrared spectroscopy, X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, and transmission electron microscopy. It can be found that the maximum reflection loss of PANI/GO/Fe₃O₄ can reach −53.5 dB at 7.5 GHz, and the bandwidth exceeds −10 dB is 2.8 GHz with absorber thickness of 3.91 mm. The electromagnetic parameters indicated enhanced electromagnetic absorption properties of the nanocomposites, which was attributed to the better impedance matching. On the basis of the above characterization, an electromagnetic complementary theory was proposed to explain the impedance matching.