Photocatalysis of Ag-Loaded TiO2 Nanotube Arrays Formed by Atomic Layer Deposition

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• 作者：Yu-Chuan Liang ; Chih-Chieh Wang ; Chi-Chung Kei ; Yang-Chih Hsueh ; Wen-Hao Cho ; Tsong-Pyng Perng
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：May 19, 2011
• 年：2011
• 卷：115
• 期：19
• 页码：9498-9502
• 全文大小：888K
• 年卷期：v.115,no.19(May 19, 2011)
• ISSN：1932-7455

文摘

Anodic aluminum oxide (AAO) film was used as a template to fabricate TiO₂ nanotubes. TiO₂ was deposited into the AAO pores by atomic layer deposition (ALD) at 100 掳C. After the top layer of TiO₂ and the AAO template were removed, an ordered array of TiO₂ nanotubes remained on the substrate. The tube thickness increased with the cycle number of ALD. The UV鈥搗is absorption spectra of the samples exhibited a red shift as the thickness increased or after annealing. The photocatalytic activity increased with the increase in the wall thickness of TiO₂ nanotubes. With deposition of Ag nanoparticles on the tubes, the nanoparticles could act as an electron trapper to slow the electron鈥揾ole recombination rate, and thus enhance the efficiency of photodecomposition of methyl orange.