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In this paper, we report the growth and characteristics of titania nanotube arrays prepared by anodic oxidation and then annealed in an oxygen atmosphere at 500℃. The titania nanotube arrays presented high sensitivity to hydrogen gas. The crystalline phase of the samples was checked by X-ray diffraction (XRD). The differences in the nanotubes morphology attributed to the etched samples due to anodiza- tion potential, reaction time and the electrolyte concentration were analyzed by scanning electron mi- croscopy (SEM). The gas sensitive parameters of the samples were obtained from resistance, the re- sponse time and the recovery time at different temperatures.
The this paper phase, the samples was checked by x -ray diffraction (XRD). The differences in the nanotubes morphology attributed to the etched samples due to anodiza- tion potential, reaction time and the electrolyte concentration were analyzed by scanning electron microscopy (SEM). The gas sensitive parameters of the samples were obtained from resistance, the re- sponse time and the recovery time at different temperatures.