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Preparation and Characterization of Stable TiO2 Colloid Composing of Nearly Monodispersive TiO2 Nanocrystallite
Abstract:
Stable TiO2 colloids composing of narrow size distrubuted anatase TiO2 nanocrystals were prepared using quaternary ammonium hydroxide, such as Me4NOH, Et4NOH and Bu4NOH, as catalyst. TEM and UV-Vis spectra measurements showed that the TiO2 colloids are quite stable in air or under ultrasound irradiation and the size of the TiO2 particles of the colloids can be tuned by changing the molar ratio of Titanium isopropoxide and the organic additive. The additive can be removed when the dried gel were calcined at 450°C for two hours, resulting in pure TiO2 nanocrystal in anatase phase.
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63-66
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Online since:
September 2013
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© 2013 Trans Tech Publications Ltd. All Rights Reserved
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