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Issue 11, 2004
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Singlet oxygen formation in photocatalytic TiO2 aqueous suspension

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The formation of reactive singlet oxygen molecule (1O2), the a1Δg state of excited O2, in the photocatalytic TiO2 aqueous suspension system was shown to be evident by detecting the near-infrared phosphorescence at 1270 nm by means of a gated photon counting method. The lifetimes of O2(1Δg) in three different media (water, ethanol, 1∶1 waterethanol mixture) were elucidated and compared with those reported in corresponding homogeneous media. Based on the comparison of the lifetime with those of the other reactive species such as OH radicals and trapped holes, the contribution of 1O2 to the actual photocatalytic procedure was discussed.

Graphical abstract: Singlet oxygen formation in photocatalytic TiO2 aqueous suspension

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Publication details

The article was received on 04 Apr 2004, accepted on 20 Apr 2004 and first published on 28 Apr 2004

Article type: Communication
DOI: 10.1039/B405084C
Citation: Phys. Chem. Chem. Phys., 2004,6, 2917-2918
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    Singlet oxygen formation in photocatalytic TiO2 aqueous suspension

    Y. Nosaka, T. Daimon, A. Y. Nosaka and Y. Murakami, Phys. Chem. Chem. Phys., 2004, 6, 2917
    DOI: 10.1039/B405084C

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