Controlled synthesis of brookite and combined brookite with rutile phases of titanium di-oxide and its characterization studies

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• 作者：T. Balaganapathi^a ; B. Kaniamuthan^a ; S. Vinoth^a ; T. Arun^b ; P. Thilakan^a ; ^{thilakan@hotmail.com}
• 关键词：Sol-gel process ; Acid catalyst ; Chelating agent ; Brookite ; Phase transition
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：1 February 2017
• 年：2017
• 卷：43
• 期：2
• 页码：2438-2440
• 全文大小：579 K
• 卷排序：43

文摘

Experimental conditions for the sol-gel synthesis of TiO2 were modified by using Polyethylene glycol (PEG) as well as an addition of acid catalyst. Synthesis of brookite and mixed brookite with rutile was obtained. X-ray powder diffraction and Micro Raman measurements confirmed the crystallization of brookite while using pure PEG4000 with low molar acid concentration and a mixed brookite with rutile phase for PEG4000 with high molar acid concentration. High Resolution Transmission Electron Microscopic analysis revealed the presence of nanocrystalline assembly with sizes between 8 and 16 nm. Direct phase transition from brookite to rutile phase was observed during the further heat treatment of brookite sample.