Preparation and hydrogen 8as sensitive characteristics of highly ordered titania nanotube arrays

• 来源期刊: 科学通报(英文版)
• 年，卷（期）: 2008,（9）
• 页码范围: 1352-1357
• 页数: 6页
• 语种: 英文
• DOI: 10.1007/s11434-008-0120-0

摘要

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.