Effect of electrochemical reduction on the structural and electrical properties of anodic TiO2 nanotubes
By Rasheed, Muhammad Asim; Ahmad, Kamran; Khaliq, Nilem; Khan, Yaqoob; Rafiq, Muhammad Aftab; Waheed, Abdul; Shah, Attaullah; Mahmood, Arshad; Ali, Ghafar
Published in Current Applied Physics
2018
Abstract
The effect of electrochemical reduction on the structural and electrical properties of amorphous as well as annealed TiO2 nanotubes (TNTs) is investigated under ambient conditions. TNTs were prepared by anodizing titanium sheet in ethylene glycol electrolyte containing NH4F and de-ionized water at 40 V for 6 h. Electrochemical reduction is carried out in 1 M aqueous KOH solution for ?15 s at 3 V. TNTs are characterized by SEM, XRD, XPS and impedance spectrometer. XRD results confirm an increase in d-spacing for (101) and (200) planes, after electrochemical reduction. XPS data reveal that electrochemical reduction produced prominent shifts of ?0.7