Influence of Graphene Oxide on AC-conduction of Hematite Nanoparticles

Abstract

The chemical sol-gel method was opted for the preparation of hematite (α-Fe2O3) . The of graphene oxide (GO) and α-Fe2O3 {i.e. (GO)x/α-Fe2O3; x = 0, 0.5, 1.0 and 1.5 wt.%} were synthesized using two-step method. The dispersion of GO and α-Fe2O3 was done using Toluene for the preparation of (GO)x/α-Fe2O3 . The crystal structure, surface morphology and modes of these were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR), respectively. XRD spectra confirmed the phase formation and crystal structure of (GO)x/α-Fe2O3 . The SEM images displayed that α-Fe2O3 were successfully dispersed over GO . FTIR spectra showed two transmittance bands at 464 cm-1 and 537 cm-1 correspond to Fe-O bond. LCR meter was used for the acquisition of frequency-dependent dielectric and impedance measurements of the samples. The variation in frequency-dependent dielectric and impedance properties was observed as GO were hybridized with α-Fe2O3 . Furthermore, the advancement in dielectric and impedance properties give evidence that the synthesized (GO)x/α-Fe2O3 could be worthy useful for high frequency devices and energy storage appliances.