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氧化鈦納米管陣列的表面聚集控制及光電化學(xué)特性
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國家自然科學(xué)基金(20873048，30970717，50827204)；高等學(xué)校博士點專項科研基金(200804871011)


Control of Surface Morphology of Highly Ordered TiO2 Nanotube Arrays and the Photoelectrochemical Properties
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    摘要:

    采用陽極氧化法在有機介質(zhì)中制備垂直排列的厚度達百微米的TiO2納米管陣列，重點考察TiO2納米管表面形貌特性的控制，以期從微觀修飾角度來提高TiO2納米管陣列膜的光電化學(xué)性能；在此基礎(chǔ)上，考察不同處理條件下的TiO2納米管陣列膜的光電化學(xué)特性。實驗結(jié)果表明：采用無水乙醇作為超聲液并結(jié)合二次蒸餾水進行漂洗能徹底清除納米管表面聚集堵塞部分，得到清潔、規(guī)整有序的納米管陣列表面，且不破壞納米管陣列膜的最佳超聲振動時間為20~30 s。在對納米管陣列的表面形貌特性進行控制后，采用一步陽極氧化法+無水乙醇超聲制備的樣品經(jīng)500 ℃退火在全譜段的光轉(zhuǎn)換效率達到1.48 %，證實對納米管陣列的表面形貌特性實施控制能有效提高其光電化學(xué)性能。

    Abstract:

    Vertically oriented TiO2 nanotube arrays having lengths up to 100 microns were prepares by anodic oxidation in organic electrolytes. Control of surface morphology of TiO2 nanotube arrays were surveyed principally, in order to improve the photoelectrochemical property of TiO2 nanotube array from a point of view of microstructure modification; based on these results, the photoelectrochemical properties of the nanotube arrays electrodes with different operation condition were evaluated. The results show that the surface collective block section can be removed entirely by ultrasonic cleaning in ethyl alcohol and the followed rinsing with double distilled water. The clean, regular and highly ordered nanotube arrays surface are obtained with an optimal ultrasonic duration 20-30 s. The as-prepared nanotube-array samples by single step anodic oxidation plus ultrasonic cleaning in ethyl alcohol with another 500 oC annealing show a remarkable photoconversion efficiency of 1.48% under full-spectrum illumination. It is believed that the control of surface morphology may be profitable for the improvement of the photoelectrochemical properties of TiO2 nanotube array.

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朱 文,劉 喜,柳慧瓊,仝大利,楊君友,彭江英.氧化鈦納米管陣列的表面聚集控制及光電化學(xué)特性[J].稀有金屬材料與工程,2011,40(6):1069~1074.[Zhu Wen, Liu Xi, Liu Huiqiong, Tong Dali, Yang Junyou, Peng Jiangying. Control of Surface Morphology of Highly Ordered TiO2 Nanotube Arrays and the Photoelectrochemical Properties[J]. Rare Metal Materials and Engineering,2011,40(6):1069~1074.]
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  • 收稿日期:2010-06-18
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