Highly ordered TiO2 nanotube arrays were fabricated on a conducting glass substrate in NH4HF2/glycol electrolyte via anodization of titanium film which was deposited by direct current magnetron sputtering (DCMS) at different temperatures. The results showed that Ti films with good homogeneity and high denseness could be formed under the conditions Ar pressure 0.35 Pa, direct current 3.5 A, and 2 h at 300 °C. Characterization of the TiO2 nanotube arrays was investigated comparatively, by altering anodization time. The surface morphology of the samples changed as the anodization time was prolonged from 10 to 150 min at 30 V. The TiO2 thin film was amorphous and could be transformed into anatase by annealing at 450 °C. On the basis of UV–visible transmission spectra the bandgap of the thin film was calculated to be 3.12 eV, and its tail extended to 2.6 eV.
Research on Chemical Intermediates – Springer Journals
Published: Feb 2, 2011
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