Enhanced Photocatalytic Water Splitting of Hydrous LiCa2Ta3O10 Prepared by Hydrothermal Treatment
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- Mitsuyama Tomohiro
- Department of Nano Science and Technology, Graduate School of Science and Technology, Kumamoto University
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- Tsutsumi Akiko
- Department of Nano Science and Technology, Graduate School of Science and Technology, Kumamoto University
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- Hata Takakazu
- Department of Nano Science and Technology, Graduate School of Science and Technology, Kumamoto University
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- Ikeue Keita
- Department of Nano Science and Technology, Graduate School of Science and Technology, Kumamoto University
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- Machida Masato
- Department of Nano Science and Technology, Graduate School of Science and Technology, Kumamoto University
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Abstract
Hydration behavior of A′Ca2Ta3O10 (A′ = Cs, Rb, K, Na, and Li) was studied focusing on the photocatalytic activity for overall water splitting under UV-irradiation. Interlayer hydration was only observed for A′ = Na and Li, which possess a large enthalpy of hydration (ΔHh°). A Na phase readily yielded a stable hydrous phase even at ambient temperature, whereas a Li phase required hydrothermal treatment at ≥160 °C. This is consistent with the fact that the Na phase kept its space group (I4⁄mmm) unchanged during hydration, whereas the Li phase changed from I4⁄mmm to P4⁄mmm. Hydration of the Li phase doubled the rate of photocatalytic gas evolution (≥700 μmol-H2 h−1) in the presence of 0.5 wt % Ni load, which was the highest in the series of A′Ca2Ta3O10. It was demonstrated that the hydrated interlayer is an efficient structural modification to enhance the photocatalytic activity of the ion-exchangeable layered perovskite-type oxides.
Journal
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- Bulletin of the Chemical Society of Japan
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Bulletin of the Chemical Society of Japan 81 (3), 401-406, 2008
The Chemical Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390001204142812288
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- NII Article ID
- 130004058891
- 10021074534
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- NII Book ID
- AA00580132
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- ISSN
- 13480634
- 00092673
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- NDL BIB ID
- 9412724
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed