Morphological Parameter of Nanotube TiO2 Thin Films via Anodization Method
Keywords:
nanotube TiO2, anodization process, TiO2thin filmsAbstract
In this research, TiO2 nanotubes were fabricated by anodization method using titanium thin films deposited onto ITO substrates by DC magnetron sputtering technique as the Ti source. Diameter and length of TiO2 nanotubes were controlled by parameters including ammonium fluoride (NH4F) at 0.4-1.4 wt%, water content at 1-4 wt% and power voltage at 20-50 V. The nanotube TiO2 films were established by scanning electron microscopy (SEM), X-Ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS) and Fourier-Transformed Infrared spectrophotometry (FTIR) techniques. XRD pattern data exhibited anatase phase when TiO2 nanotube were annealed at 400 oC for 3 hrs. The XPS results revealed complement of Ti, O, F, Sn, In and C. The FT-IR spectrum exhibited the characteristic bands of the TiO2 ,indicating Ti-O stretching mode. On the SEM images, average diameter and length of TiO2 nanotubes depend on ammonium fluoride, water content and on power voltage, with optimal condition of TiO2 nanotubes being at 0.8 wt% ammonium fluoride, 1 wt% water and power voltage at 30 V. TiO2 nanotubes with diameter 38 nm and length 763 nm could be used as dye sensitized solar cell.
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