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Quantitative Evaluation on Photocatalytic Activity of Anatase TiO2 Nanocrystals in Aqueous Solution
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 Title & Authors
Quantitative Evaluation on Photocatalytic Activity of Anatase TiO2 Nanocrystals in Aqueous Solution
Jeon, Byungwook; Kim, Yu Kwon;
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 Abstract
Quantitative evaluation of photocatalytic activity of oxide nanoparticles in aqueous solution is quite challenging in that the kinetic reaction rate is determined by a complicated interplay among various limiting factors such as light scattering and absorption, diffusion and adsorption of reactants in condensed liquid phase, photoexcited charge separation and recombination rate, and the exact nature of active sites determined by detailed morphology and crystallinity of nanocrystals. Here, we present our simple experimental results showing that the kinetic regime of a typical photocatalytic degradation experiment over UV-irradiated nanoparticles in aqueous solution is in that dominated by the photoactivity of and its concentration. This result lays a firm ground of using the measured kinetic reaction rate in evaluating photocatalytic efficiency of oxide nanocrystals under evaluation.
 Keywords
Photocatalysis; nanocrystals;Reaction rate;Photodegradation;Methylene blue;
 Language
English
 Cited by
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