Anodization Fabrication of Highly Ordered TiO2 Nanotubes
Anodization Fabrication of Highly Ordered TiO2 Nanotubes
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DOI：
10.1021/jp903037f
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发表时间：
2009-07-23
影响因子：
3.7
通讯作者：
Zhang, Wei
中科院分区：
文献类型：
--
作者：
Li, Shiqi;Zhang, Gengmin;Zhang, Wei
本文主要研究了用两步阳极氧化法制备高度有序的二氧化钛纳米管和一些新型纳米结构。第一步阳极氧化实际上是对钛箔表面进行预处理，并提供有序的印迹，作为纳米管进一步生长的模板。结果表明，采用第二步阳极氧化法制备的TiO2纳米管在尺寸均匀性和排列有序性方面明显优于采用常规一步阳极氧化法制备的TiO2纳米管。然后调整阳极氧化的参数以获得更复杂的结构。当第二步阳极氧化的电压低于第一步阳极氧化的电压时，可以得到莲藕状的TiO2纳米结构，其中每个印迹包含几个更小的纳米孔。将二次阳极氧化进一步分为两个阶段，合成了双层纳米管阵列。它们包含两个明显分开的部分，即竹形的上部和光滑的下部。这些结果证明了两步阳极氧化法制备高质量TiO2纳米管的有效性和可控性，在太阳能电池、光子晶体和储氢等领域具有潜在的应用前景。
This Article focuses on the fabrication of highly ordered nanotubes and some novel nanostructures of titania (TiO2) with a two-step anodization method. The first-step anodization was actually a pretreatment of the Ti foil surface and provided well-ordered imprints that served as a template for the further growth of nanotubes. As a result, the TiO2 nanotubes growing in the second-step anodization appreciably outperformed those fabricated with the conventional one-step Ti anodization in terms of size uniformity and arrangement orderliness. The parameters of the anodization were then modulated to obtain more complex structures. When the voltage in the second-step anodization was lower than that in the first-step anodization, a lotus root-shaped TiO2 nanostructure, in which each imprint contained several smaller nanopores, was achieved. When the second anodization was further divided into two stages, double-layered nanotube arrays were synthesized. They contained two distinctly separated parts, i.e., the bamboo-shaped upper one and the smooth-walled lower one. These results have demonstrated the effectiveness and controllability of the two-step anodization method in producing high-quality TiO2 nanotubes, which are believed to have potential applications in such fields as solar cells, photonic crystals, and hydrogen storage.