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Photoacoustic spectroscopic estimation of electron mobility in titanium(IV) oxide photocatalysts

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Title: Photoacoustic spectroscopic estimation of electron mobility in titanium(IV) oxide photocatalysts
Authors: Murakami, Naoya Browse this author
Abe, Ryu Browse this author →KAKEN DB
Prieto Mahaney, Orland Omar Browse this author
Torimoto, Tsukasa Browse this author →KAKEN DB
Ohtani, Bunsho Browse this author →KAKEN DB
Issue Date: 2007
Publisher: Elsevier
Journal Title: Studies in Surface Science and Catalysis
Volume: 172
Start Page: 429
End Page: 432
Abstract: Double-beam photoacoustic (PA) spectroscopy was employed in measurements on the decay of trivalent titanium (Ti3+) species, in titanium(IV) oxide (TiO2) photocatalysts, produced by trapping of photoexcited electrons. The PA signal attributed to Ti3+ rapidly decayed in the dark due to the electron transfer from Ti3+ to molecular oxygen (O2) adsorbed on the surface. The rate of decay was evaluated for various TiO2 powders by the analysis of decay profile, and compared with the rate of photocatalytic dehydrogenation of methanol in an aqueous solution. The observed positive correlation between them suggests that both decay of Ti3+ by O2 and photocatalytic dehydrogenation of methanol are governed by the mobility of photoexcited electrons.
Type: article (author version)
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)

Submitter: 大谷 文章

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