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Electrophoresis–A new approach for the determination of organic matters adsorption on irradiated TiO2

Paper ID Volume ID Publish Year Pages File Format Full-Text
29336 44154 2007 6 PDF Available
Title
Electrophoresis–A new approach for the determination of organic matters adsorption on irradiated TiO2
Abstract

The application of electrophoretic analysis for monitoring the adsorption of organic onto TiO2 and for detecting the formation of adsorbed organic species during the photocatalytic reactions has been successfully demonstrated. When highly adsorbed organic compounds such as maleic acid, oxalic acid and 1,2,3-THB interacted with TiO2 surface at pH 3, the zeta potential of TiO2 exhibited a negative shift. On the contrary, no apparent change in zeta potential of TiO2 was recorded from the interaction of weakly adsorbed organic compounds such as methanol, sucrose, glucose and resorcinol. The electrophoretic analysis showed that during photocatalytic reaction, the weakly adsorbed resorcinol formed intermediate species that were highly adsorbing onto TiO2, while no change in TiO2 zeta potential during the photocatalytic reaction of methanol. The removal kinetics of adsorbed organic species during the photocatalytic reaction of resorcinol and 1,2,3-THB can be easily followed by monitoring the change in zeta potential of TiO2. As the adsorbed organic compounds were progressively removed from the irradiated surface of photocatalyst, the zeta potential of TiO2 gradually shifted to a more positive value and finally restored to the zeta potential of bare TiO2 when complete removal of adsorbed organic was achieved.

Keywords
Electrophoresis; Photocatalyst; Adsorption; Irradiation
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Electrophoresis–A new approach for the determination of organic matters adsorption on irradiated TiO2
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 187, Issue 1, 5 March 2007, Pages 127–132
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us