Articles producció científica> Enginyeria Electrònica, Elèctrica i Automàtica

Gas Sensing Properties of WO3 Nanowires Decorated with Iridium Oxide Nanoparticles

  • Identification data

    Identifier: imarina:9230884
    Handle: https://hdl.handle.net/20.500.11797/imarina9230884
    Authors:
    Navarrete, ÈricBittencourt, CarlaLlobet, Eduard
    Abstract:
    Tungsten trioxide (WO3) nanowires decorated with iridium oxide nanoparticles (WO3-IrO2) have been studied as candidate towards low NO2 concentrations gas detection. Furthermore, reducing gases such ammonia vapors and hydrogen have been also studied. WO3 nanowires were grown following an aerosol assisted chemical vapor deposition (AACVD) methodology; and decorated in two steps. As first step, nanowires were grown and subsequently annealed at 500 °C for two hours in order to remove impurities and enhance the oxidation ratio. In a second step, employing an iridium oxide nanoparticles suspension they were decorated through AACVD. Iridium oxide nanoparticles were synthetized from an inorganic precursor through an acidic hydrolysis synthesis route. The sensors were also characterized through environmental scanning electron microscopy (ESEM) and X-ray photoelectron spectroscopy (XPS). All iridium oxide based sensors shows a higher response towards all the gases tested in comparison towards pristine sensors, despite showing the best performance towards NO2.

  • Others:

    Author, as appears in the article.: Navarrete, Èric; Bittencourt, Carla; Llobet, Eduard
    Department: Enginyeria Electrònica, Elèctrica i Automàtica
    URV's Author/s: Llobet Valero, Eduard / Navarrete Gatell, Èric
    Abstract: Tungsten trioxide (WO3) nanowires decorated with iridium oxide nanoparticles (WO3-IrO2) have been studied as candidate towards low NO2 concentrations gas detection. Furthermore, reducing gases such ammonia vapors and hydrogen have been also studied. WO3 nanowires were grown following an aerosol assisted chemical vapor deposition (AACVD) methodology; and decorated in two steps. As first step, nanowires were grown and subsequently annealed at 500 °C for two hours in order to remove impurities and enhance the oxidation ratio. In a second step, employing an iridium oxide nanoparticles suspension they were decorated through AACVD. Iridium oxide nanoparticles were synthetized from an inorganic precursor through an acidic hydrolysis synthesis route. The sensors were also characterized through environmental scanning electron microscopy (ESEM) and X-ray photoelectron spectroscopy (XPS). All iridium oxide based sensors shows a higher response towards all the gases tested in comparison towards pristine sensors, despite showing the best performance towards NO2.
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    Author's mail: eric.navarrete@urv.cat eduard.llobet@urv.cat
    Author identifier: 0000-0001-6164-4342
    Record's date: 2023-11-27
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://www.mdpi.com/2504-3900/2/13/964
    Papper original source: Proceedings. 2 (13): 964-
    APA: Navarrete, Èric; Bittencourt, Carla; Llobet, Eduard (2018). Gas Sensing Properties of WO3 Nanowires Decorated with Iridium Oxide Nanoparticles. Proceedings, 2(13), 964-. DOI: 10.3390/proceedings2130964
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Article's DOI: 10.3390/proceedings2130964
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2018
    Publication Type: Journal Publications

  • Keywords:

    nanowires; tungsten trioxide; iridium oxide; gas sensing; NO2

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