| タイトル |
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Highly enhanced photocatalytic activity of nanotubular Fe2O3/Fe2WO6 nanocomposite film formed by anodizing FeW alloy
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| 作成者 |
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| アクセス権 |
metadata only access |
| 主題 |
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Other
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Photocatalysis
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Other
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Fe2WO6
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Other
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Anodic oxide
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Other
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Nanotube
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| 内容注記 |
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Abstract
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This study demonstrates the highly enhanced photocatalytic activity of Fe2O3 nanotubes by making a hetero-junction with Fe2WO6 and doping of W6+ ions into the alpha-Fe2O3 phase for water splitting and decomposition of an organic pollutant. Both nanotubular and compact Fe2O3/Fe2WO6 films are formed by anodizing the magnetron -sputtered Fe-9 at% W alloy in fluoride-containing ethylene glycol electrolyte and subsequent annealing at 450 degrees C. Their photocatalytic activities are compared with W-free nanoporous Fe2O3 film formed on high-purity Fe. The nanotubular Fe2O3/Fe2WO6 film exhibits a markedly enhanced photoelectrochemical oxygen evolution reaction and photocatalytic degradation of methylene blue compared with the nanoporous W-free Fe2O3 film. Because of the larger surface area, the nanotubular Fe2O3/Fe2WO6 film reveals further increased activity than the compact Fe2O3/Fe2WO6 film. The STEM study discloses the dispersion of Fe2WO6 nanoparticles in the alpha-Fe2O3 phase after annealing at 450 degrees C, and XRD analysis shows the possible doping of W species into alpha-Fe2O3. The formation of the W-doped alpha-Fe2O3/Fe2WO6 heterojunction likely promotes the separation of photogenerated electron-hole pairs, enhancing photocatalytic activity. Hence, the nanotubular Fe2O3/Fe2WO6 film is a possible candidate for visible-light-driven photocatalysts.
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| 出版者 |
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Elsevier
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| 日付 |
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| 言語 |
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| 資源タイプ |
journal article |
| 出版タイプ |
NA |
| 資源識別子 |
HDL
http://hdl.handle.net/2115/89291
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| 関連 |
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isIdenticalTo
DOI
https://doi.org/10.1016/j.elecom.2023.107460
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| 収録誌情報 |
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Electrochemistry Communications
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巻149
開始ページ107460
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| コンテンツ更新日時 |
2023-07-26 |
