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Issue 6, 2005
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Enhanced photocatalytic formation of hydroxyl radicals on fluorinated TiO2

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Abstract

Direct experimental evidence of the higher concentration of hydroxyl radicals generated on fluorinated titanium dioxide (F–TiO2) under irradiation was obtained by spin-trapping EPR measurements. The faster photoinduced bleaching of the azo dye Acid Red 1 (AR1) observed in the presence of F–TiO2 was explained by the high affinity of the azo double bond towards ˙OH radicals. Moreover, the pronounced decrease of the AR1 bleaching rate by addition of 2-propanol, as hydroxyl radicals scavenger, on F–TiO2 and not on naked TiO2 demonstrated that on fluorinated titania AR1 is mainly degraded via ˙OH radical attack.

Graphical abstract: Enhanced photocatalytic formation of hydroxyl radicals on fluorinated TiO2

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Publication details

The article was received on 07 Jan 2005, accepted on 26 Jan 2005 and first published on 02 Feb 2005


Article type: Communication
DOI: 10.1039/B500194C
Citation: Phys. Chem. Chem. Phys., 2005,7, 1100-1102
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    Enhanced photocatalytic formation of hydroxyl radicals on fluorinated TiO2

    M. Mrowetz and E. Selli, Phys. Chem. Chem. Phys., 2005, 7, 1100
    DOI: 10.1039/B500194C

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