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KMID : 1024520020110090987
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Journal of the Environmental Sciences
2002 Volume.11 No. 9 p.987 ~ p.992
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A Photocatalytic Degradation of Bromate over Nanosized Titanium Dioxide Prepared by Reverse Micelle
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Lee Man-Sig
Hong Seong-Su
Park Heung-Jai
Cheong Yung-Eon
Park Won-Woo
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Abstract
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Nanosized titania sol has been produced by the controlled hydrolysis of titanium tetraisopropoxide(TTIP) in sodium bis(2-ethylhexyl)sulfosuccinate(AOT) reverse micelles. The physical properties, such as crystallite size and crystallinity according to R ratio have been investigated by FT-IR, XRD and UV-DRS. In addition, the photocatalytic degradation of bromate has been studied by using batch reactor in the presence of UV light in order to compare the photocatalytic activity of prepared nanosized titania. It is shown that the anatase structure appears in the 300~ calcination temperature range and the formation of anatase into rutile starts above . The crystallite size increases with increasing R ratio. In the photocatalytic degradation of bromate, the photocatalytic decomposition of bromate shows the decomposition rate increases with decreasing initial concentration of bromate and with increasing intensity of light.
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KEYWORD
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Nanosized titania, AOT, Reverse micelle, Photocatalytic degradation of bromate
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