Direct Formation of Crystalline Phase Pure Rutile TiO2 Nanostructures by a Facile Hydrothermal Method

详细信息    查看全文

• 作者：Aref Mamakhel ; Christoffer Tyrsted ; Espen Drath B酶jesen ; Peter Hald ; Bo Brummerstedt Iversen
• 刊名：Crystal Growth & Design
• 出版年：2013
• 出版时间：November 6, 2013
• 年：2013
• 卷：13
• 期：11
• 页码：4730-4734
• 全文大小：357K
• 年卷期：v.13,no.11(November 6, 2013)
• ISSN：1528-7505

文摘

Small titania, TiO₂, nanoparticles (< 10 nm) are normally restricted to the anatase polymorph, and synthesis of stable rutile nanoparticles below the critical size is challenging. Here, we report on a fast, low temperature and environmentally benign hydrothermal method to prepare phase pure rutile TiO₂ nanorods with an average diameter of 42 nm covered by crystalline spherical nanoparticles around 10 nm in size. The synthesis approach utilizes titanium tetraisopropoxide and glycolic acid at 200 掳C for 3鈥?2 h, and the samples were characterized by powder X-ray diffraction (PXRD), UV鈥搗is spectroscopy, FT-IR spectroscopy, and transmission electron microscopy (TEM). In addition, in situ synchrotron PXRD measurements were carried out to follow the formation and growth of the rutile nanoparticles under the present mild hydrothermal conditions, and it is observed that rutile TiO₂ is formed directly from solution without intermediate brookite or anatase phases.