Nano Archive

Preparation of TiO2 nanoparticles by supercritical carbon dioxide

Wu, Chien-I and Huang, Jiann-Wen and Wen, Ya-Lan and Wen, Shaw-Bing and Shen, Yun-Hwei and Yeh, Mou-Yung (2008) Preparation of TiO2 nanoparticles by supercritical carbon dioxide. Materials Letters, 62 (12-13). 1923 - 1926.

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Nano-sized titanium dioxide TiO2 powder was successfully prepared from its precursor titanium (IV) isopropoxide (TTIP) by a system comprising of supercritical fluids microemulsion and supercritical-drying method, in which TTIP reacted in reversed micelles formed by surfactant Zonyl FSJ employing a supercritical carbon dioxide system. The milky white product, collected from the bottom of the pressure cell turned into sol–gel after sitting in the air for 5 days. Amorphous TiO2 particles with particles size 2–7 nm can be obtained from the sol–gel by the supercritical-drying method. The amorphous TiO2 particles were converted to anatase phase by calcining at 500 °C. Characterization of the TiO2 powder consisted of TEM, XRD and EDS methods.

Item Type:Article
Uncontrolled Keywords:Titanium dioxide; Nanoparticles; Supercritical carbon dioxide; Microemulsion
Subjects:Material Science > Nanofabrication processes and tools
Material Science > Nanostructured materials
ID Code:6660
Deposited By:SPI
Deposited On:10 Feb 2010 09:05
Last Modified:10 Feb 2010 09:05

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