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Improvement in NO2 Sensing Properties of Semiconductor-Type Gas Sensors by Loading of Au Into Porous In2O3 Powders
http://hdl.handle.net/10069/39310
http://hdl.handle.net/10069/3931027616994-78a8-486a-b7b6-3c0dee1b4f2d
名前 / ファイル | ライセンス | アクション |
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Fmat6_81.pdf (2.9 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2019-07-17 | |||||
タイトル | ||||||
タイトル | Improvement in NO2 Sensing Properties of Semiconductor-Type Gas Sensors by Loading of Au Into Porous In2O3 Powders | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Loading of Au | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | NO2 sensor | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Polymethylmethacrylate microsphere | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Porous In2O3 powder | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Ultrasonic spray pyrolysis | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Ultrasonic-assisted emulsion polymerization | |||||
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 | |||||
著者 |
Ueda, Taro
× Ueda, Taro× Ishida, Keijiro× Kamada, Kai× Hyodo, Takeo× Shimizu, Yasuhiro |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Porous (pr-) In2O3 powders loaded with and without noble metals (Au, Pd, or Pt) were prepared by ultrasonic spray pyrolysis employing the PMMA microspheres as a template (typical particle size (ps): 28 or 70 nm with a diameter), and their NO2 sensing properties were examined. The Au loading on the pr-In2O3 was effective to increase the NO2 response at lower operating temperature (?200°C), while the metal loading of Pd or Pt were hardly effective. In addition, a decrease in the PMMA microspheres (from 70 to 28 nm in ps) largely increased the NO2 response,and an optimized amount of Au loaded on the pr-In2O3 sensor was 1.0 wt%. The decrease in the thickness of the sensing layer improved the NO2 response and response speed. It was suggested that the Au loading enhanced the amount of the negatively adsorbed NO2 on the bottom part of the sensing layer, leading to the increase in the NO2 response. Furthermore, the introduction of additional macropores (ps: 150 nm) to the 1.0 wt% Au loaded pr-In2O3 sensor increased the response to a low concentration of NO2 (0.025 ppm) at 30°C. Therefore, it was found that easy gas diffusion from the surface to the bottom part of the sensing layer increased the effective concentration of NO2, and thus the NO2 response was increased. |
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書誌情報 |
Frontiers in Materials 巻 6, p. 81, 発行日 2019-04-24 |
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出版者 | ||||||
出版者 | Frontiers Media S.A. | |||||
EISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 22968016 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.3389/fmats.2019.00081 | |||||
権利 | ||||||
権利情報 | c 2019 Ueda, Ishida, Kamada, Hyodo and Shimizu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
引用 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Frontiers in Materials, 6, 81; 2019 |