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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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タイトル: Photoacoustic spectroscopic analysis of photoinduced change in absorption of titanium(IV) oxide photocatalyst powders : A novel feasible technique for measurement of defect density
著者: Murakami, Naoya 著作を一覧する
Prieto Mahaney, Orlando Omar 著作を一覧する
Torimotoa, Tsukasa 著作を一覧する
Ohtani, Bunsho 著作を一覧する
発行日: 2006年 7月26日
出版者: Elsevier B.V.
誌名: Chemical Physics Letters
巻: 426
号: 1-3
開始ページ: 204
終了ページ: 208
出版社 DOI: 10.1016/j.cplett.2006.06.001
抄録: 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 (URI): http://www.sciencedirect.com/science/journal/00092614
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/14587
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 大谷 文章

 

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