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Catalytic activity of Nb-doped α-Fe2O3—Heterojunction structure, ferrimagnet-like character, and high activity

https://hiroshima.repo.nii.ac.jp/records/2007076
https://hiroshima.repo.nii.ac.jp/records/2007076
f506ad51-734f-4190-806b-56ab8f0fa90c
名前 / ファイル ライセンス アクション
InoCheC_169_113077.pdf InoCheC_169_113077.pdf (1.5 MB)
 Download is available from 2026/8/31.
Item type デフォルトアイテムタイプ_(フル)(1)
公開日 2024-12-06
タイトル
タイトル Catalytic activity of Nb-doped α-Fe2O3—Heterojunction structure, ferrimagnet-like character, and high activity
言語 en
作成者 Rahman , Habibur

× Rahman , Habibur

en Rahman , Habibur

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Zhang, Bofan

× Zhang, Bofan

en Zhang, Bofan

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Kubuki, Shiro

× Kubuki, Shiro

en Kubuki, Shiro

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Nakashima, Satoru

× Nakashima, Satoru

en Nakashima, Satoru

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アクセス権
アクセス権 embargoed access
アクセス権URI http://purl.org/coar/access_right/c_f1cf
権利情報
言語 en
権利情報 © 2024. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
権利情報
言語 en
権利情報 This is not the published version. Please cite only the published version.
権利情報
言語 ja
権利情報 この論文は出版社版ではありません。引用の際には出版社版をご確認、ご利用ください。
主題
言語 en
主題Scheme Other
主題 α-Fe2O3
主題
言語 en
主題Scheme Other
主題 FeNbO4
主題
言語 en
主題Scheme Other
主題 Heterojunction
主題
言語 en
主題Scheme Other
主題 Photo-fenton
主題
言語 en
主題Scheme Other
主題 Catalysis
内容記述
内容記述 Photocatalytic activity of α-Fe2O3 under visible light had been studied intensively. Rapid electron-hole recombination is the main drawback of α-Fe2O3 and the photocatalytic activity can be enhanced by transition metal doping and heterojunction structure. In the present study, α-Fe2O3 doped with various amounts of Nb were synthesized using a simple sol–gel method, and further characterization and catalytic activity were investigated. PXRD, TEM-EDS and Mössbauer measurement showed the formation of weak-ferromagnetic Nb-doped α-Fe2O3 and FeNbO4, where heterojunction structure was suggested. UV–vis spectrum showed a broad absorption in visible-light regions with a narrow band gap between 2.27 and 2.97 eV. Photo-Fenton reaction using α-Fe2O3 to decompose methylene blue (MB) was conducted to evaluate the catalytic activity. Nb-doped sample showed a significant improvement compared with pure α-Fe2O3. PXRD and Mössbauer spectroscopy revealed the α-Fe2O3 and FeNbO4 phases, which were attached to a magnet due to the ferrimagentic character of Nb-doped α-Fe2O3. The high catalytic activity with k value 7.1 * 10−2/min was obtained for 7.4Nb600. Higher catalytic activity was also observed for 20Nb600 and 40Nb600, which were driven by higher surface area, Nb substitution and heterojunction structure. Mechanistic analysis revealed that the primary reaction of MB decomposition is the Photo-Fenton process.
言語 en
出版者
出版者 Elsevier
言語 en
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
出版タイプ
出版タイプ AM
出版タイプResource http://purl.org/coar/version/c_ab4af688f83e57aa
関連情報
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1016/j.inoche.2024.113077
開始ページ
開始ページ 113077
書誌情報 en : Inorganic Chemistry Communications

巻 169, p. 113077, 発行日 2024-08-31
旧ID 55827
備考 The full-text file will be made open to the public on 31 August 2026 in accordance with publisher's 'Terms and Conditions for Self-Archiving'
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