Cyclic voltammetry response of TiO₂ nanostructures prepared via fast and facile microwave irradiation

In this study, we report the fabrication of TiO₂ nanorods by a simple, facile and environmentally benign microwave-assisted hydrothermal technique. The phase purity, structural and morphological examination was carried out by Raman, X-ray diffraction and scanning electron microscopy imaging. Optical properties studied through absorbance and reflectance depicted the optical bandgap of 3.25 eV. The cyclic voltammetry response of the prepared TiO₂ nanorods was studied. TiO₂ nanorods showed a rapid electrolyte ion diffusion, which increased the specific capacitance. Cyclic voltammogram showed both capacitive as well as battery like behaviour of the sample. The prepared sample exhibited a high charge storage capacity per unit mass of 444.6 F g^-1, which arises due to both battery as well as capacitive effects. The specific capacitance due to capacitive behaviour was found to be 231.2 F g^-1. This high charge storage capacity per unit mass (specific capacitance) can be attributed to the enhancement of the redox-active sites and pseudocapacitive intercalation effect of the anatase phase of TiO₂ nanostructures. The results support the electrode's potential as a viable choice for wearable and portable electronic devices