Photocatalytic Activities of Vertically Aligned Manganese- Doped ZnO Nanorods Synthesized on ITO Film by Electrochemical Technique

摘要

A facile electrochemical approach was used to one step growth of Mn-doped ZnO nanorods on indiumtin oxide conductive glass. FESEM images show an increase in diameter and height of ZnO nanorodsby doping Mn ions in ZnO lattice. XRD results indicate that the Mn dopant lead to a shift in thediffraction peak position toward a lower angle side compared to the undoped ZnO nanorods.Electrochemical impedance spectroscopy results proving that doping Mn ions in ZnO nanorods can leadto higher free-electron carriers that accelerate charge transfer and reduces the resistance. Photocatalyticactivities of the sample were studied by degrading methylene blue under UV–vis light irradiation. Thephotodegradation efficiency of Mn-doped ZnO nanorods achieved for 100 min irradiation times was81% which reveals better findings compared to previous reports. The Mn-doped ZnO nanostructureshave higher rate constant and degradation efficiency as it has higher surface defects, length, andcrystallinity than others.