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Absorption and action spectra analysis of ammonium fluoride-doped titania photocatalysts
| 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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Submitter: 大谷 文章
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