Hierarchically Nanostructured Rutile Arrays: Acid Vapor Oxidation Growth and Tunable Morphologies

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• 作者：Xianfeng Yang ; Jianle Zhuang ; Xiuyan Li ; Dihu Chen ; Gangfeng Ouyang ; Zhongquan Mao ; Yaxiong Han ; Zhenhui He ; Chaolun Liang ; Mingmei Wu ; Jimmy C. Yu
• 刊名：ACS Nano
• 出版年：2009
• 出版时间：May 26, 2009
• 年：2009
• 卷：3
• 期：5
• 页码：1212-1218
• 年卷期：0
• ISSN：1936-086X

文摘

A general acid vapor oxidation (AVO) strategy has been developed to grow highly oriented hierarchically structured rutile TiO₂ nanoarrays with tunable morphologies from titanium thin films. This is a simple one-pot synthesis approach involving the reaction of a titanium surface with the vapor generated from a hydrochloric acid solution in a Teflon lined autoclave. To the best of our knowledge, this is the first successful attempt to grow ordered tree-like titania nanoarrays. A possible formation mechanism for the interesting architectures has been proposed based on series of time-dependent experiments. By adjusting the initial HCl concentration, films of different rutile structures including nanotrees, dendritic nanobundles, and nanorods can be selectively obtained. Subsequently, the surface morphologies and wettability can be readily tuned.