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Electrochemical Detection of Ethanol in Air Using Graphene Oxide Nanosheets Combined with Au-WO(3)

Detection, monitoring, and analysis of ethanol are important in various fields such as health care, food industries, and safety control. In this study, we report that a solid electrolyte gas sensor based on a proton-conducting membrane is promising for detecting ethanol in air. We focused on graphen...

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Autores principales: Fauzi, Aynul Sakinah Ahmad, Hamidah, Nur Laila, Kitamura, Shota, Kodama, Taiga, Sonda, Kosuke, Putri, Ghina Kifayah, Shinkai, Takeshi, Ahmad, Muhammad Sohail, Inomata, Yusuke, Quitain, Armando T., Kida, Tetsuya
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9105121/
https://www.ncbi.nlm.nih.gov/pubmed/35590882
http://dx.doi.org/10.3390/s22093194
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author Fauzi, Aynul Sakinah Ahmad
Hamidah, Nur Laila
Kitamura, Shota
Kodama, Taiga
Sonda, Kosuke
Putri, Ghina Kifayah
Shinkai, Takeshi
Ahmad, Muhammad Sohail
Inomata, Yusuke
Quitain, Armando T.
Kida, Tetsuya
author_facet Fauzi, Aynul Sakinah Ahmad
Hamidah, Nur Laila
Kitamura, Shota
Kodama, Taiga
Sonda, Kosuke
Putri, Ghina Kifayah
Shinkai, Takeshi
Ahmad, Muhammad Sohail
Inomata, Yusuke
Quitain, Armando T.
Kida, Tetsuya
author_sort Fauzi, Aynul Sakinah Ahmad
collection PubMed
description Detection, monitoring, and analysis of ethanol are important in various fields such as health care, food industries, and safety control. In this study, we report that a solid electrolyte gas sensor based on a proton-conducting membrane is promising for detecting ethanol in air. We focused on graphene oxide (GO) as a new solid electrolyte because it shows a high proton conductivity at room temperature. GO nanosheets are synthesized by oxidation and exfoliation of expanded graphite via the Tour’s method. GO membranes are fabricated by stacking GO nanosheets by vacuum filtration. To detect ethanol, Au-loaded WO(3) is used as the sensing electrode due to the excellent activity of gold nanoparticles for the catalysis of organic molecules. Au-WO(3) is coupled with rGO (reduced graphene oxide) to facilitate the electron transport in the electrode. Ce ions are intercalated into the GO membrane to facilitate proton transport. The sensor based on the Ce doped-GO membrane combined with Au-WO(3)/rGO as a sensing electrode shows good electric potential difference (ΔV) responses to ethanol in the air at room temperature. The sensor signal reaches more than 600 mV in response to ethanol at 40 ppm in air, making it possible to detect ethanol at a few ppb (parts per billion) level. The ethanol sensing mechanism was discussed in terms of the mixed-potential theory and catalysis of ethanol on Au-WO(3).
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spelling pubmed-91051212022-05-14 Electrochemical Detection of Ethanol in Air Using Graphene Oxide Nanosheets Combined with Au-WO(3) Fauzi, Aynul Sakinah Ahmad Hamidah, Nur Laila Kitamura, Shota Kodama, Taiga Sonda, Kosuke Putri, Ghina Kifayah Shinkai, Takeshi Ahmad, Muhammad Sohail Inomata, Yusuke Quitain, Armando T. Kida, Tetsuya Sensors (Basel) Article Detection, monitoring, and analysis of ethanol are important in various fields such as health care, food industries, and safety control. In this study, we report that a solid electrolyte gas sensor based on a proton-conducting membrane is promising for detecting ethanol in air. We focused on graphene oxide (GO) as a new solid electrolyte because it shows a high proton conductivity at room temperature. GO nanosheets are synthesized by oxidation and exfoliation of expanded graphite via the Tour’s method. GO membranes are fabricated by stacking GO nanosheets by vacuum filtration. To detect ethanol, Au-loaded WO(3) is used as the sensing electrode due to the excellent activity of gold nanoparticles for the catalysis of organic molecules. Au-WO(3) is coupled with rGO (reduced graphene oxide) to facilitate the electron transport in the electrode. Ce ions are intercalated into the GO membrane to facilitate proton transport. The sensor based on the Ce doped-GO membrane combined with Au-WO(3)/rGO as a sensing electrode shows good electric potential difference (ΔV) responses to ethanol in the air at room temperature. The sensor signal reaches more than 600 mV in response to ethanol at 40 ppm in air, making it possible to detect ethanol at a few ppb (parts per billion) level. The ethanol sensing mechanism was discussed in terms of the mixed-potential theory and catalysis of ethanol on Au-WO(3). MDPI 2022-04-21 /pmc/articles/PMC9105121/ /pubmed/35590882 http://dx.doi.org/10.3390/s22093194 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Fauzi, Aynul Sakinah Ahmad
Hamidah, Nur Laila
Kitamura, Shota
Kodama, Taiga
Sonda, Kosuke
Putri, Ghina Kifayah
Shinkai, Takeshi
Ahmad, Muhammad Sohail
Inomata, Yusuke
Quitain, Armando T.
Kida, Tetsuya
Electrochemical Detection of Ethanol in Air Using Graphene Oxide Nanosheets Combined with Au-WO(3)
title Electrochemical Detection of Ethanol in Air Using Graphene Oxide Nanosheets Combined with Au-WO(3)
title_full Electrochemical Detection of Ethanol in Air Using Graphene Oxide Nanosheets Combined with Au-WO(3)
title_fullStr Electrochemical Detection of Ethanol in Air Using Graphene Oxide Nanosheets Combined with Au-WO(3)
title_full_unstemmed Electrochemical Detection of Ethanol in Air Using Graphene Oxide Nanosheets Combined with Au-WO(3)
title_short Electrochemical Detection of Ethanol in Air Using Graphene Oxide Nanosheets Combined with Au-WO(3)
title_sort electrochemical detection of ethanol in air using graphene oxide nanosheets combined with au-wo(3)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9105121/
https://www.ncbi.nlm.nih.gov/pubmed/35590882
http://dx.doi.org/10.3390/s22093194
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