Photocatalytic and Photoelectrocatalytic Performance of 1% Pt Doped TiO2 for the Detoxification of Water |
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| Authors: | H Selcuk W Zaltner JJ Sene M Bekbolet MA Anderson |
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| Affiliation: | (1) Environmental Engineering Department, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey;(2) Environmental Chemistry and Technology Program, University of Wisconsin-Madison, 660 N. Park Street, Madison, WI 53706, USA;(3) Bogazici University Institute of Environmental Sciences, 34342 Bebek, Istanbul, Turkey |
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| Abstract: | The degradation of formic acid (HCOOH), FA (a surrogate contaminant) using titanium dioxide (TiO2) and 1% Pt doped TiO2 electrodes, prepared by sol—gel methods, was investigated in a photoelectrocatalytic (PEC) system in order to determine the effect of Pt doping on the oxidation potential of TiO2. Pt doping shifts the position of band edge and therefore the direct and indirect oxidation potentials of TiO2 in PEC systems. As a result, the degradation of formic acid via the generation of hydrogen peroxide production on 1%Pt—TiO2 electrodes was much better than that on non-doped electrodes. The degradation of HCOOH was also examined with respect to the faradaic efficiency of this process. It was found that the 1%Pt—TiO2 photoanode had a 30% higher efficiency than that of non-doped TiO2 photoanodes. |
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| Keywords: | oxidation photoelectrocatalytic photoanode photocurrent Pt-doped TiO2 |
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