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Synthesis of titanium(IV) oxide of ultra-high photocatalytic activity : high-temperature hydrolysis of titanium alkoxides with water liberated homogeneously from solvent alcohols

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タイトル: Synthesis of titanium(IV) oxide of ultra-high photocatalytic activity : high-temperature hydrolysis of titanium alkoxides with water liberated homogeneously from solvent alcohols
著者: Kominami, Hiroshi 著作を一覧する
Kato, Jun-ichi 著作を一覧する
Murakami, Shin-ya 著作を一覧する
Kera, Yoshiya 著作を一覧する
Inoue, Masashi 著作を一覧する
Inui, Tomoyuki 著作を一覧する
Ohtani, Bunsho 著作を一覧する
キーワード: Titanium(IV) oxide
Anatase
Photocatalyst
Thermal stability
Crystallization
Organic solvent
Titanium alkoxide
Hydrolysis
発行日: 1999年 7月22日
出版者: Elsevier Science B.V.
誌名: Journal of Molecular Catalysis A Chemical
巻: 144
号: 1
開始ページ: 165
終了ページ: 171
出版社 DOI: 10.1016/S1381-1169(98)00350-1
抄録: Thermal treatment of titanium(IV) alkoxides dissolved in alcohols at temperature of 523–573 K under autogenous pressure yielded microcrystalline anatase titanium(IV) oxide (TiO2) with diameter of 11–31 nm and surface area of 42–138 m2 g−1. Similar treatment in hydrocarbons such as toluene gave no solid products, indicating that both hydrolysis of alkoxides with water liberated homogeneously from solvent alcohols and crystallization of anatase phase occurred simultaneously. These TiO2's were thermally stable, e.g., BET surface area of TiO2 synthesized at 573 K, 63 m2 g−1, was reduced only 30% (45 m2 g−1) even by calcination at 973 K. Their photocatalytic activity was examined in mineralization of acetic acid in aqueous solutions under aerated conditions and dehydrogenation of 2-propanol under deaerated conditions; almost all the samples showed the activity more than twice higher than those of representative active photocatalysts, Degussa P-25 and Ishihara ST-01. The superior activity of the present TiO2 photocatalysts was attributable to compatibility of high crystallinity and large surface area owing to the newly developed synthetic procedure.
関連URI: http://www.sciencedirect.com/science/journal/13811169
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/17131
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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