Synthesis and microwave absorption properties of graphene-oxide(GO)/polyaniline nanocomposite with Fe₃O₄ particles

In order to investigate the impedance matching properties of microwave absorbers, the ternary nanocomposites of GO/PANI/Fe₃O₄ (GPF) are prepared via a two-step method, GO/PANI composites are synthesized by dilute polymerization in the presence of aniline monomer and GO, and GO/PANI/Fe₃O₄ is prepared via a co-precipitation method. The obtained nanocomposites are characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR), respectively. The microwave absorbability reveals enhanced microwave absorption properties compared with GO, PANI, and GO/PANI. The maximum reflection loss of GO/PANI/Fe₃O₄ is up to -27 dB at 14 GHz with its thickness being 2 mm, and its absorption bandwidths exceeding -10 dB are more than 11.2 GHz with its thickness values being in the range from 1.5 mm-4 mm. It provides that GO/PANI/Fe₃O₄ can be used as an attractive candidate for microwave absorbers.