Large single-crystal anatase TiO₂ Bipyramids

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• 作者：Qixin Deng ; Mingdeng Wei ; Xiaokun Ding ; Lilong Jiang ; Kewei Wei ; Haoshen Zhou
• 关键词：A1. Low-dimensional structure ; B1. Oxides ; A2. Single-crystal growth ; B1. Nanomaterials
• 刊名：Journal of Crystal Growth
• 出版年：2010
• 出版时间：1 January 2010
• 年：2010
• 卷：312
• 期：2
• 页码：213-219
• 全文大小：815 K

文摘

In this study, large single-crystal anatase TiO₂ bipyramids were first successfully synthesized using a simple hydrothermal route. The synthesized bipyramids were characterized by XRD, SEM and TEM measurements, and found that these bipyramids are highly crystalline anatase TiO₂ with a size up to 3.6 μm between the two ends. On the other hand, it was also found that the size and shape of bipyramids were significantly influenced by the pH value. Based on a series of experimental results, a possible model for the process of dissolving-coalescing-growing, has been proposed for the formation of large anatase TiO₂ bipyramids.