Study on the Anatase to Rutile Phase Transformation and Controlled Synthesis of Rutile Nanocrystals with the Assistance of Ionic Liquid

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• 作者：Kunlun Ding ; Zhenjiang Miao ; Baoji Hu ; Guimin An ; Zhenyu Sun ; Buxing Han ; Zhimin Liu
• 刊名：Langmuir
• 出版年：2010
• 出版时间：June 15, 2010
• 年：2010
• 卷：26
• 期：12
• 页码：10294-10302
• 全文大小：1063K
• 年卷期：v.26,no.12(June 15, 2010)
• ISSN：1520-5827

文摘

We developed a route to synthesize rutile TiO₂ nanocrystals (NCs) with the assistance of 1-butyl-3-methylimidazolium chloride (bmim⁺Cl⁻). The phase transformation from anatase to rutile phase was investigated, and a simple model to describe the phase transformation process was proposed considering that the nucleation and growth of rutile phase were determined by the aggregation manner of anatase NCs and Ostwald ripening process, respectively. It was demonstrated that the surfactant-like nature of the IL used was crucial for controlling the crystallization process via controlling the aggregation manner of the NCs. The phase, shape, and size of TiO₂ NCs could be tuned by the controlling the operating conditions, such as temperature, solution acidity, and reactant concentration of the bmim⁺Cl⁻/TiCl₄/H₂O reaction system. Phase-pure rutile multipods and 1D nanorods with different sizes were controllably obtained.