ID | 118722 |
著者 |
Dong, Yusong
The University of Auckland|The MacDiarmid Institute for Advanced Materials and Nanotechnology|The Dodd-Walls Centre for Photonic and Quantum Technologies
Fujisaka, Ai
Tokushima University
Sun-Waterhouse, Dongxiao
The University of Auckland
Waterhouse, Geoffrey I. N.
The University of Auckland|The MacDiarmid Institute for Advanced Materials and Nanotechnology|The Dodd-Walls Centre for Photonic and Quantum Technologies
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資料タイプ |
学術雑誌論文
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抄録 | Colloidal crystal templating is a simple yet remarkably versatile synthetic strategy toward inverse opal (IO) photonic crystals for optical sensing and catalytic applications. Herein, we report the successful fabrication of tantalum (V) oxide, Ta2O5, inverse opal thin films and powders using the colloidal crystal templating method, utilizing poly(methyl methacrylate) (PMMA) colloidal crystals as sacrificial templates and TaCl5 as the tantalum source. The Ta2O5 IO thin films and powders showed structural color at ultraviolet (UV) and visible wavelengths, with the photonic band gap (PBG) position along the [111] direction increasing linearly with the diameter of macropores (D) in the inverse opals and also the refractive index of the medium filling the macropores, in excellent accord with a modified Bragg’s law expression. Thermal ammonolysis of the Ta2O5 inverse opals at 700 °C yielded well-ordered Ta3N5 IO films and powders possessing high specific surface areas (37 m2 g–1) and a semiconductor band gap of 2.0–2.1 eV. A Pt/Ta3N5 IO photocatalyst delivered a H2 production rate of ∼300 μmol g–1 h–1 in aqueous methanol (10 vol % MeOH) under visible-light irradiation (300 W Xe lamp, λ ≥ 420 nm), approximately twice that achieved using conventional Pt/Ta3N5 powder photocatalysts (161 μmol g–1 h–1, 8.4 m2 g–1). Results demonstrate that inverse opal engineering is an effective approach for realizing Ta2O5 IO thin films for sensing applications and Ta3N5 IOs with enhanced photocatalyst performance.
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掲載誌名 |
Chemistry of Materials
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ISSN | 08974756
15205002
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cat書誌ID | AA10699608
AA12096771
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出版者 | American Chemical Society
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巻 | 35
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号 | 19
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開始ページ | 8281
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終了ページ | 8300
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発行日 | 2023-09-21
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権利情報 | This article is licensed under CC-BY-NC-ND 4.0 (https://creativecommons.org/licenses/by-nc-nd/4.0/).
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EDB ID | |
出版社版DOI | |
出版社版URL | |
フルテキストファイル | |
言語 |
eng
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著者版フラグ |
出版社版
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部局 |
理工学系
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