Correlation Between I-V and Bonding Network of Fe3O4/rGO Nanocomposite

Abstract

Reduced graphene oxide based iron oxide (Fe3O4/ rGO) nanocomposites were synthesized by reduction of as synthesized graphene oxide (GO) in the existence of Fe(NO3)3 concentration. A various characterisation techniques such as SEM, XRD, FTIR, Raman spectroscopy, UV-Visible, and XPS have been utilised for the determination of the morphological, structural, chemical, microstructure, optical and compositional properties of as synthesized Fe3O4/rGO nanocomposite. The XRD results shows a broad peak of rGO at 26.51° which attributes to (002) plane and other two weak peaks appeared at 2θ= 36.4° and 43.1° that attributes to (311) and (400) planes respectively for Fe3O4 confirming the existence of Fe3O4 into the Fe3O4/rGO nanocomposite with poor crystallinity. The vibrational signatures owing to the O-H, C-H2, C=O, C=C, C-O and Fe-O bonds appeared at 3292 cm-1, 2990.42 cm-1, 2360.87 cm-1, 1558.13 cm-1, 1176.47 cm-1, and 575.64 cm-1 respectively. The Fe3O4 peak is obtained in between 100-800 cm-1 range in the Raman analysis and the value of ID/IG was obtained as 1.55. Furthermore, the current-voltage (I-V) measurement for Fe3O4/rGO nanocomposites exhibited non-Ohmic electrical conductivity.