Electrochemical Detection of Short-lived Species Produced by Dye Sensitization Using TiO_2/Au Mosaic Electrode Array
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Short-lived species of superoxide ion (O<SUB>2</SUB><SUP>−</SUP>) produced by dye sensitization on dye (Rhodamine B: Rh-B)/TiO<SUB>2</SUB> disks under irradiation were studied using a TiO<SUB>2</SUB>/Au mosaic electrode array. The oxidation current at the Au electrodes was found to increase upon irradiation of Rh-B on the TiO<SUB>2</SUB> disks in an air-saturated neutral aqueous solution, indicating the detection of reaction products. The main reaction products were identified to be O<SUB>2</SUB><SUP>−</SUP> by adding superoxide dismutase (SOD) to the solution, which rapidly decomposed O<SUB>2</SUB><SUP>−</SUP> in the solution.
- Chemistry Letters
Chemistry Letters 35(11), 1218-1219, 2006-11-05
The Chemical Society of Japan