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	Single-phase titania nanocrystallites and nanofibers from titanium tetrachloride in acetone and other ketones
	Wu, Yu ; Liu, Hong-Mei ; Xu, Bo-Qing ; Zhang, Zao-Li ; Su, Dang-Sheng
	2010-05-06 ; 2010-05-06
关键词	VERSATILE REACTION SYSTEM LOW-TEMPERATURE SYNTHESIS TIO2 NANOCRYSTALS GROWTH-KINETICS BENZYL ALCOHOL RUTILE TIO2 ANATASE NANOPARTICLES CRYSTALLINE TICL4 Chemistry, Inorganic & Nuclear
中文摘要	Single-phase titania nanomaterials were prepared by autoclaving titanium tetrachloride in acetone at 80-140 degrees C. Depending on the molar ratio of TiCl4 to acetone (TiCl4/Ac), TiO2 materials with different phases and morphologies were obtained. When the TiCl4 concentration was no higher than TiCl4/Ac = 1/15, single-phase anatase TiO2 nanocrystals in sizes ranging from 4 to 10 nm were prepared by tuning TiCl4/Ac ratios from 1/90 to 1/15. However, when the TiCl4 concentration was high enough (e.g., TiCl4/Ac >= 1/10), single-phase rutile TiO2 nanofibers were obtained selectively. The materials were characterized comprehensively using X-ray diffraction, transmission electron microscopy, Raman spectroscopy, thermogravimetric analysis, and nitrogen adsorption measurements. With the aid of GC/MS analysis of organic products in the liquid phase, it is shown that the controlled hydrolysis of TiCl4 with water, which was in situ generated from the TiCl4-catalyzed aldol condensation reactions of acetones, played an important role in the formation of the titania nanomaterials. Some of the organic condensates may function to stabilize the phase and morphology of the materials. This mechanism was also supported by our success in using other ketones as alternatives to acetone in the synthesis.
语种	英语 ; 英语
出版者	AMER CHEMICAL SOC ; WASHINGTON ; 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/12284]
专题	清华大学
推荐引用方式 GB/T 7714	Wu, Yu,Liu, Hong-Mei,Xu, Bo-Qing,et al. Single-phase titania nanocrystallites and nanofibers from titanium tetrachloride in acetone and other ketones[J],2010, 2010.
APA	Wu, Yu,Liu, Hong-Mei,Xu, Bo-Qing,Zhang, Zao-Li,&Su, Dang-Sheng.(2010).Single-phase titania nanocrystallites and nanofibers from titanium tetrachloride in acetone and other ketones..
MLA	Wu, Yu,et al."Single-phase titania nanocrystallites and nanofibers from titanium tetrachloride in acetone and other ketones".(2010).

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