Hydrolytic Stages of Titania Nanoparticles Formation Jointly Studied by SAXS, DLS, and TEM

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• 作者：Alexey Tarasov ; Verena Goertz ; Eugene Goodilin ; Hermann Nirschl
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：June 20, 2013
• 年：2013
• 卷：117
• 期：24
• 页码：12800-12805
• 全文大小：385K
• 年卷期：v.117,no.24(June 20, 2013)
• ISSN：1932-7455

文摘

Thermohydrolysis of titanium compound solutions is a widely used method for titania-based nanomaterials preparation. The relationship between properties and synthetic conditions of such materials is derived from the nature of processes occurring in solution during material formation. In the present paper, new insights on titania nanoparticles formation by thermohydrolysis of TiCl₄ water solution are given based on a joint study by SAXS, DLS, and TEM techniques. The key stage was supposed to rely on a bonding rearrangement process inside an inorganic polymer causing crystalline phase formation characterized by 3鈥? nm gyration radii according to SAXS. The model of TiCl₄ thermohydrolysis describing the whole process of TiO₂ nanoparticles formation was supposed. The presence of several distinct steps allows one to control phase composition and morphology of the final nanoparticles of titania, opening up the possibility to vary their functional properties.