Unusual Enrichment and Assembly of TiO2 Nanocrystals at Water/Hydrophobic Interfaces in a Pure Inorganic Phase

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• 作者：Guolei Xiang ; Yong Long ; Jie He ; Biao Xu ; Haitao Liu ; Xun Wang
• 刊名：Langmuir
• 出版年：2014
• 出版时间：January 21, 2014
• 年：2014
• 卷：30
• 期：2
• 页码：617-623
• 全文大小：562K
• ISSN：1520-5827

文摘

We report an unusual enrichment and assembly of TiO₂ nanocrystals at water/hydrophobic interfaces through oxidative hydrolysis of TiCl₃ in water. The assembly is a spontaneous process that involves on-water inorganic reaction and assembly in the absence of any organic phases. In this process, TiO₂ nanoparticles are preferentially produced at water/hydrophobic interfaces. When the surface tension of the aqueous phase is above a critical value, ca. 25鈥?5 mN m^鈥?, these TiO₂ nanocrystals can spontaneously accumulate at water/air interfaces to produce macroscopic sized sheets and tubes.