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Absorption and action spectra analysis of ammonium fluoride-doped titania photocatalysts

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Title: Absorption and action spectra analysis of ammonium fluoride-doped titania photocatalysts
Authors: Dozzi, Maria Vittoria Browse this author
Ohtani, Bunsho Browse this author →KAKEN DB
Selli, Elena Browse this author
Issue Date: 2011
Publisher: Royal Society of Chemistry
Journal Title: Physical Chemistry Chemical Physics
Volume: 13
Issue: 40
Start Page: 18217
End Page: 18227
Publisher DOI: 10.1039/c1cp21558b
Abstract: The photocatalytic behaviour of a series of ammonium fluoride (NH4F)-doped titania (TiO2) photocatalysts was investigated in the decomposition of acetic acid in aqueous suspensions and in the gas phase mineralization of acetaldehyde. Very similar photocatalytic activity trends, usually increasing with increasing the calcination temperature for a given nominal dopant amount, were obtained for the two test reactions. Moderately doped TiO2 calcined at 700 °C, consisting of pure anatase, was the best performing photocatalyst in both reactions. The photocatalytic oxidation of acetic acid was investigated systematically as a function of irradiation wavelength, by collecting so-called action spectra. By comparing the shapes of the action spectra with those of the absorption spectra of the investigated photocatalysts a model is proposed, based on spectral features deconvolution, which allows a clear distinction between inactive light absorption and effective photoactivity in acetic acid decomposition.
Rights: Phys. Chem. Chem. Phys., 2011, 13, 18217-18227 - Reproduced by permission of the PCCP Owner Societies
Type: article (author version)
URI: http://hdl.handle.net/2115/48656
Appears in Collections:触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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