Photo electrochemical ability of dense and aligned ZnO nanowire arrays fabricated through electrochemical anodization

Abstract

In the present study, dense and aligned zinc oxide nanowire arrays annealed at 350 °C, with an average diameter of 99 ± 6 nm measured from histogram by Lorentz curve fitting, are fabricated through electrochemical anodization in a potassium bicarbonate aqueous solution at room temperature. During anodization, a transition in the surface morphology from nanoflowers to aligned nanowires with respect to growing time was observed. Photocurrent density of as fabricated ZnO nanowires were studied using three-electrode electrochemical cell using aqueous 1.0 M of Na2SO4 electrolyte and was found to be 30 μA/cm2 which indicates its competence to be used in UV–visible driven photoelectrode material applications.