TiO2一维纳米材料及其纳米结构的合成

本文对合成TiO₂一维纳米材料及其有序纳米阵列的阳极氧化法、模板法以及水热法进行了全面而系统的评述，着重介绍了它们的最新研究进展。阳极氧化法能制备牢固负载于基体上的TiO₂纳米管阵列，这有助于构筑TiO₂纳米结构及其在纳米器件上的应用；与多种制备技术如溶胶－凝胶工艺、电化学沉积以及原子层沉积等相结合，模板法可以合成出多种形貌的TiO₂纳米材料如纳米管、纳米线和纳米棒，并可以通过改变所用模板的微观尺寸来调控TiO₂一维纳米材料及其有序阵列的微结构参数；水热合成法可以制备出直径小且比表面积大的TiO2纳米管粉末。但从目前看来，该法还不能制备出牢固负载于基体上的有序纳米阵列。文章最后指出了TiO₂一维纳米材料及其有序纳米阵列合成中存在的问题及今后发展方向。

Synthesis of One-Dimensional TiO2 Nanomaterials and Their Nanostructures

The methods including anodization process, templated-based approaches and hydrothermal synthesis method for preparing TiO₂ one-dimensional nanomaterials and their highly-ordered nanoarrays are systematically reviewed. TiO₂ nanotube arrays firmly loaded onto substrates, which facilitates the construction of TiO₂ nanostructures and has been applied in nanodevices, can be synthesized by the anodization process. TiO₂ nanomaterials with various morphologies (nanotubes, nanowires and nanorods) can be produced by the templated-based approaches combining with different preparation technologies (e.g. sol-gel process, electrochemical deposition and atomic layer deposition).Furthermore, the parameters of micostructure of the TiO2 nanomaterias and their highly-ordered nanoarrays can be controlled by changing the pore size of the applied templates. TiO₂ nanotubes with small diameter and large surface area can be prepared by the hydrothermal synthesis method. However, it is still difficult to prepare TiO₂ highly-ordered nanoarrays firmly loaded on a substrate with the above method. The problems and developing trends in the synthesis of one-dimensional TiO₂ nanomaterials and their nanostructures are presented.