In situ photoelectrochemical measurement of phthalic acid on titania
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Wen, William
Zhang, Hongzhong
Zhao, Huijun
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Abstract
An in situ photoelectrochem. method is proposed to det. adsorbed phthalic acid (PA) on the TiO2 surface in a sensitive, reproducible and accurate manner. The pre-adsorbed PA in the dark and the diffused PA from org. soln. can be mineralized simultaneously under UV illumination due to the strong UV-induced oxidn. power of TiO2. By controlling the UV illumination, the amt. of adsorbed PA on TiO2 surface was detd. in the presence of PA in a small time scale (e.g., seconds), eliminating the washing step after the adsorption reaction. This provides a convenient and effective alternative to study adsorption behavior in low concns. on TiO2. The proposed method was applied to det. the adsorption equil. const. of PA.
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Journal of Photochemistry and Photobiology A: Chemistry
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208
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2-Mar
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© 2009 Elsevier B.V.. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
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Chemical sciences
Colloid and surface chemistry
Electrochemistry
Transport properties and non-equilibrium processes
Biological sciences
Engineering