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Photoacoustic spectroscopic analysis of photoinduced change in absorption of titanium(IV) oxide photocatalyst powders : A novel feasible technique for measurement of defect density

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Title: Photoacoustic spectroscopic analysis of photoinduced change in absorption of titanium(IV) oxide photocatalyst powders : A novel feasible technique for measurement of defect density
Authors: Murakami, Naoya Browse this author
Prieto Mahaney, Orlando Omar Browse this author
Torimotoa, Tsukasa Browse this author
Ohtani, Bunsho Browse this author →KAKEN DB
Issue Date: 26-Jul-2006
Publisher: Elsevier B.V.
Journal Title: Chemical Physics Letters
Volume: 426
Issue: 1-3
Start Page: 204
End Page: 208
Publisher DOI: 10.1016/j.cplett.2006.06.001
Abstract: Photoabsorption properties of titanium(IV) oxide powders were investigated by photoacoustic (PA) spectroscopy. The photoacoustic spectra obtained under steady-state ultraviolet irradiation showed appearance and growth of two kinds of PA signal bands, which were attributable to trivalent titanium species (Ti3+) and trapped holes or surface peroxide species. The saturation limit of the PA signal was estimated by analyzing the time course of Ti3+ signals and compared to the density of Ti3+ determined by a photochemical method. The results suggest that the photoacoustic spectroscopic technique is a feasible alternative method for estimation of Ti3+ as an empirical measure of defect density.
Relation: http://www.sciencedirect.com/science/journal/00092614
Type: article (author version)
URI: http://hdl.handle.net/2115/14587
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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