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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
| Title: | Synthesis of titanium(IV) oxide of ultra-high photocatalytic activity : high-temperature hydrolysis of titanium alkoxides with water liberated homogeneously from solvent alcohols |
| Authors: | Kominami, Hiroshi Browse this author | | Kato, Jun-ichi Browse this author | | Murakami, Shin-ya Browse this author | | Kera, Yoshiya Browse this author | | Inoue, Masashi Browse this author | | Inui, Tomoyuki Browse this author | | Ohtani, Bunsho Browse this author →KAKEN DB |
| Keywords: | Titanium(IV) oxide | | Anatase | | Photocatalyst | | Thermal stability | | Crystallization | | Organic solvent | | Titanium alkoxide | | Hydrolysis |
| Issue Date: | 22-Jul-1999 |
| Publisher: | Elsevier Science B.V. |
| Journal Title: | Journal of Molecular Catalysis A Chemical |
| Volume: | 144 |
| Issue: | 1 |
| Start Page: | 165 |
| End Page: | 171 |
| Publisher DOI: | 10.1016/S1381-1169(98)00350-1 |
| Abstract: | 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. |
| Relation: | http://www.sciencedirect.com/science/journal/13811169 |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/17131 |
| 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)
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Submitter: 大谷 文章
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