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Gas Sensing Properties of WO3 Nanowires Decorated with Iridium Oxide Nanoparticles

  • Dades identificatives

    Identificador: imarina:9230884
    Handle: https://hdl.handle.net/20.500.11797/imarina9230884
    Autors:
    Navarrete, ÈricBittencourt, CarlaLlobet, Eduard
    Resum:
    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.

  • Altres:

    Autor segons l'article: Navarrete, Èric; Bittencourt, Carla; Llobet, Eduard
    Departament: Enginyeria Electrònica, Elèctrica i Automàtica
    Autor/s de la URV: Llobet Valero, Eduard / Navarrete Gatell, Èric
    Resum: 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.
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    Adreça de correu electrònic de l'autor: eric.navarrete@urv.cat eduard.llobet@urv.cat
    Identificador de l'autor: 0000-0001-6164-4342
    Data d'alta del registre: 2023-11-27
    Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
    Enllaç font original: https://www.mdpi.com/2504-3900/2/13/964
    Referència a l'article segons font original: Proceedings. 2 (13): 964-
    Referència de l'ítem segons les normes 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
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    DOI de l'article: 10.3390/proceedings2130964
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2018
    Tipus de publicació: Journal Publications

  • Paraules clau:

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

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