Formation and Characterization of TiO2–SnOx–Sn Composite Nanowires Fabricated by Reduction/Oxidation of Sn and Ti Ions
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概要
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We demonstrate that TiO2–SnOx–Sn composite nanowires (NWs) can be obtained by the reduction/oxidation of Sn and Ti ions. First, SnO2 nanowires were synthesized on TiO2/alumina substrate by a thermal evaporation through the vapor–liquid–solid (VLS) mechanism. Afterwards, SnO2 NWs/TiO2/alumina was thermally annealed in Ti powder at 1050 °C in a controlled mixture of gaseous argon and hydrogen (H2). The SnO2 nanowires were then decomposed to SnO and H2O vapors, which were together with Ti vapor species to form the TiO2–SnOx–Sn composite nanowires. High-resolution X-ray photoelectron spectroscopy (XPS) evaluated that the as-synthesized TiO2 nanowires mainly consisted of TiO2 with the dopants SnOx and Sn. Through the evaluation of the change in Gibbs free energy, it was found that a spontaneous reaction resulted in the formation of TiO2–SnOx–Sn composite nanowires. The characterization and formation of TiO2–SnOx–Sn composite nanowires are discussed.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2008-01-25
著者
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Wu Jyh-ming
Department Of Chemical And Materials Engineering Chinese Culture University
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Wu Jyh-Ming
Department of Material Science and Engineering, Feng-Chia University, No. 100 Wenhwa Rd., Seatwen, Taichung 40724, Taiwan
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