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

Murakami, Naoya; Abe, Ryu; Prieto Mahaney, Orland Omar et al.

Studies in Surface Science and Catalysis, 2007, 172, 429-432

Permalink : https://hdl.handle.net/2115/48670

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アクセス権	open access
URI	https://hdl.handle.net/2115/48670
タイトル	Photoacoustic spectroscopic estimation of electron mobility in titanium(IV) oxide photocatalysts
著者	Murakami, Naoya ; Abe, Ryu ; Prieto Mahaney, Orland Omar ; Torimoto, Tsukasa ; Ohtani, Bunsho
著者名 Murakami, Naoya
e-Rad_Researcher 60356376 著者名 Abe, Ryu
著者名 Prieto Mahaney, Orland Omar
e-Rad_Researcher 60271029 著者名 Torimoto, Tsukasa
e-Rad_Researcher 80176924 著者名 Ohtani, Bunsho
言語	英語
発行日	2007
出版者	Elsevier
収録物名	Studies in Surface Science and Catalysis
巻(号)	172
ページ	429-432
抄録	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.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
NCID	AA10721773