Production of TiO2 Nanotubes and Nanoparticles

TiO2 nanotubes and nanoparticles were obtained by anodization of metallic Ti foil in a 0.5% HF, 1:7 acetic acid aqueous solution. Voltages of 23 and 35 V were applied and the anodization time was varied. Scanning Electron Microscope (SEM) and Raman scattering spectroscopy were utilized to analyze the obtained structures. It was observed that nanotubes with larger diameter are obtained for higher anodization voltages, also a morphology and crystalline phase dependency on anodization time, for a given voltage, were observed. Nanotubes with diameters in the 20nm to 90 nm range were obtained for different anodization times and voltages.