Synthesis, structural and optical properties of pure and rare-earth ion doped TiO₂ nanowire arrays by a facile hydrothermal technique

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• 作者：Vengala Rao B ; i ; Chinnambedu Murugesan Raghavan ; Bhaskar kumar Gr ; he ; Sang Su Kim ; Kiwan Jang ; Dong-Soo Shin ; Soung-Soo Yi ; Jung-Hyun Jeong
• 关键词：TiO2 nanowires ; Hydrothermal treatment ; Photo catalysis
• 刊名：Thin Solid Films
• 出版年：29 November, 2013
• 年：2013
• 卷：547
• 期：Complete
• 页码：207-211
• 全文大小：880 K

文摘

Single crystalline pure and rare-earth metal ions (Eu^3 + and Ce^3 +) doped TiO₂ nanowire arrays were prepared on conductive fluorine doped indium tin oxide substrates by a facile hydrothermal method. Initially the conditions and parameters were optimized to prepare the high quality TiO₂ nanowire arrays in the absence of organic additives. The average diameter and length of the TiO₂ nanowire were found to be ~ 30-50 nm and ~ 0.5-1.5 渭m, respectively. The formations of rutile phase structure in all the samples were confirmed by x-ray diffractometric analysis while the transmission electron microscopy confirms the single crystallinity and the maximum orientation of growth direction along [001] for the as-grown TiO₂ nanowire. The optical properties of all the samples were analyzed using photoluminescence spectroscopy. The photocatalytic properties of the pure and doped TiO₂ were investigated for the decomposition of organic toludine blue-O dye under ultraviolet irradiation. The result demonstrates that the Ce^3 +: TiO₂ decomposed almost 90% of the organic dye within 80 min.