Highly-ordered TiO2 nanotube arrays up to 220 μm in length:: use in water photoelectrolysis and dye-sensitized solar cells
Highly-ordered TiO2 nanotube arrays up to 220 μm in length:: use in water photoelectrolysis and dye-sensitized solar cells
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DOI：
10.1088/0957-4484/18/6/065707
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发表时间：
2007-02-14
期刊：
影响因子：
3.5
通讯作者：
Grimes, Craig A.
中科院分区：
文献类型：
--
作者：
Shankar, Karthik;Mor, Gopal K.;Grimes, Craig A.
最近已经报道了通过Ti箔的阳极化来制造长度高达134 μ m的高度有序的TiO 2纳米管阵列（Paulose等，2006 J. Phys. Chem. B 110 16179）。这项工作报告的制造技术的扩展，以实现二氧化钛纳米管阵列的长度可达220 μ m，与长度-外径的纵横比约为1400，以及它们在染料敏化太阳能电池和水的光电解制氢的初步应用。高度有序的二氧化钛纳米管阵列的制备通过恒电位阳极氧化的钛箔在含氟离子浴与非水有机极性电解质，包括N-甲基甲酰胺，二甲基亚砜，甲酰胺，或乙二醇的组合。取决于阳极氧化电压，所得纳米管阵列的内孔径在20至150 nm的范围内。作为确认掠射角X射线衍射和HRTEM研究，所制备的纳米管是无定形的，但在高温下退火结晶。
The fabrication of highly-ordered TiO2 nanotube arrays up to 134 mu m in length by anodization of Ti foil has recently been reported ( Paulose et al 2006 J. Phys. Chem. B 110 16179). This work reports an extension of the fabrication technique to achieve TiO2 nanotube arrays up to 220 mu m in length, with a length-to-outer diameter aspect ratio of approximate to 1400, as well as their initial application in dye-sensitized solar cells and hydrogen production by water photoelectrolysis. The highly-ordered TiO2 nanotube arrays are fabricated by potentiostatic anodization of Ti foil in fluoride ion containing baths in combination with non-aqueous organic polar electrolytes including N-methylformamide, dimethyl sulfoxide, formamide, or ethylene glycol. Depending upon the anodization voltage, the inner pore diameters of the resulting nanotube arrays range from 20 to 150 nm. As confirmed by glancing angle x-ray diffraction and HRTEM studies, the as-prepared nanotubes are amorphous but crystallize with annealing at elevated temperatures.