Photoelectrochemical degradation of 4-chlorocatechol at TiO2 electrodes: Comparison between sorption and photoreactivity

Janet M. Kesselman; Nathan S Lewis; Michael R. Hoffmann

doi:10.1021/es960888k

Photoelectrochemical degradation of 4-chlorocatechol at TiO₂ electrodes: Comparison between sorption and photoreactivity

Janet M. Kesselman, Nathan S Lewis, Michael R. Hoffmann

California Institute of Technology

Research output: Contribution to journal › Article › peer-review

104 Citations (Scopus)

Abstract

The TiO₂-catalyzed photodegradation of a strongly adsorbing substrate, 4-chlorocatechol, has been investigated as a function of solution concentration and pH at illuminated polycrystalline TiO₂ electrodes operated at a constant current density. The results are compared to the previously determined sorption behavior of 4-chlorocatechol. The initial rates of 4- chlorocatechol photodegradation measured at pH 3, 5, and 8 and solution concentrations of 20, 50, and 200 μM show a linear correlation with the concentration of the sorbed substrate.

Original language	English
Pages (from-to)	2298-2302
Number of pages	5
Journal	Environmental Science and Technology
Volume	31
Issue number	8
DOIs	https://doi.org/10.1021/es960888k
Publication status	Published - Aug 1997

ASJC Scopus subject areas

Environmental Science(all)
Environmental Chemistry
Environmental Engineering

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abstract = "The TiO2-catalyzed photodegradation of a strongly adsorbing substrate, 4-chlorocatechol, has been investigated as a function of solution concentration and pH at illuminated polycrystalline TiO2 electrodes operated at a constant current density. The results are compared to the previously determined sorption behavior of 4-chlorocatechol. The initial rates of 4- chlorocatechol photodegradation measured at pH 3, 5, and 8 and solution concentrations of 20, 50, and 200 μM show a linear correlation with the concentration of the sorbed substrate.",

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AB - The TiO2-catalyzed photodegradation of a strongly adsorbing substrate, 4-chlorocatechol, has been investigated as a function of solution concentration and pH at illuminated polycrystalline TiO2 electrodes operated at a constant current density. The results are compared to the previously determined sorption behavior of 4-chlorocatechol. The initial rates of 4- chlorocatechol photodegradation measured at pH 3, 5, and 8 and solution concentrations of 20, 50, and 200 μM show a linear correlation with the concentration of the sorbed substrate.

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