Articles producció científica> Enginyeria Electrònica, Elèctrica i Automàtica

AACVD and gas sensing properties of nickel oxide nanoparticle decorated tungsten oxide nanowires

  • Identification data

    Identifier: imarina:6389423
    Authors:
    Navarrete, EricBittencourt, CarlaUmek, PolonaLlobet, Eduard
    Abstract:
    © 2018 The Royal Society of Chemistry. Here, we show that the aerosol assisted chemical vapor deposition process is suitable for growing single crystalline tungsten oxide nanowires loaded with nickel oxide nanoparticles. This method allows achieving of a wide range of nickel oxide loadings on tungsten oxide nanowires with high effectivity. It also allows for the direct growth of these nanomaterials onto application substrates for developing resistive metal oxide gas sensors. Different morphological and compositional analysis tools have been employed for the characterization of the nanomaterials, finding that nickel oxide nanoparticles are homogeneously distributed over the tungsten oxide nanowire surface. However, at high Ni loadings, even though the size of the nanoparticles remains unchanged, they form agglomerates, especially at the tips of tungsten nanowires. The gas sensing properties of the different nanomaterials grown towards methane, ethanol, nitrogen dioxide and hydrogen sulfide have been studied. The optimized loading of tungsten oxide with nickel oxide nanoparticles has a positive effect on increasing the sensitivity and selectivity of the resulting nanomaterial to hydrogen sulfide, reaching a five-fold increase in the response towards this species. This improvement is attributed to combined chemical and electronic sensitization effects. Therefore, these nanomaterials show good potential for developing inexpensive resistive sensors able to monitor the presence of hydrogen sulfide in the environment.
  • Others:

    Author, as appears in the article.: Navarrete, Eric; Bittencourt, Carla; Umek, Polona; Llobet, Eduard
    Department: Enginyeria Electrònica, Elèctrica i Automàtica
    URV's Author/s: Llobet Valero, Eduard / Navarrete Gatell, Èric
    Keywords: Thin-films Temperature Sensors Sensitivity Performance P-type Level Aerosol-assisted cvd
    Abstract: © 2018 The Royal Society of Chemistry. Here, we show that the aerosol assisted chemical vapor deposition process is suitable for growing single crystalline tungsten oxide nanowires loaded with nickel oxide nanoparticles. This method allows achieving of a wide range of nickel oxide loadings on tungsten oxide nanowires with high effectivity. It also allows for the direct growth of these nanomaterials onto application substrates for developing resistive metal oxide gas sensors. Different morphological and compositional analysis tools have been employed for the characterization of the nanomaterials, finding that nickel oxide nanoparticles are homogeneously distributed over the tungsten oxide nanowire surface. However, at high Ni loadings, even though the size of the nanoparticles remains unchanged, they form agglomerates, especially at the tips of tungsten nanowires. The gas sensing properties of the different nanomaterials grown towards methane, ethanol, nitrogen dioxide and hydrogen sulfide have been studied. The optimized loading of tungsten oxide with nickel oxide nanoparticles has a positive effect on increasing the sensitivity and selectivity of the resulting nanomaterial to hydrogen sulfide, reaching a five-fold increase in the response towards this species. This improvement is attributed to combined chemical and electronic sensitization effects. Therefore, these nanomaterials show good potential for developing inexpensive resistive sensors able to monitor the presence of hydrogen sulfide in the environment.
    Thematic Areas: Química Physics, applied Odontología Materials science, multidisciplinary Materials chemistry Materiais Interdisciplinar General chemistry Engenharias iii Ciências ambientais Ciências agrárias i Chemistry (miscellaneous) Chemistry (all) Biotecnología Astronomia / física
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 20507526
    Author's mail: eric.navarrete@urv.cat eric.navarrete@urv.cat eduard.llobet@urv.cat
    Author identifier: 0000-0001-6164-4342
    Record's date: 2024-10-12
    Papper version: info:eu-repo/semantics/submittedVersion
    Link to the original source: https://pubs.rsc.org/en/content/articlelanding/2018/tc/c8tc00571k
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: Journal Of Materials Chemistry c. 6 (19): 5181-5192
    APA: Navarrete, Eric; Bittencourt, Carla; Umek, Polona; Llobet, Eduard (2018). AACVD and gas sensing properties of nickel oxide nanoparticle decorated tungsten oxide nanowires. Journal Of Materials Chemistry c, 6(19), 5181-5192. DOI: 10.1039/c8tc00571k
    Article's DOI: 10.1039/c8tc00571k
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2018
    Publication Type: Journal Publications
  • Keywords:

    Chemistry (Miscellaneous),Materials Chemistry,Materials Science, Multidisciplinary,Physics, Applied
    Thin-films
    Temperature
    Sensors
    Sensitivity
    Performance
    P-type
    Level
    Aerosol-assisted cvd
    Química
    Physics, applied
    Odontología
    Materials science, multidisciplinary
    Materials chemistry
    Materiais
    Interdisciplinar
    General chemistry
    Engenharias iii
    Ciências ambientais
    Ciências agrárias i
    Chemistry (miscellaneous)
    Chemistry (all)
    Biotecnología
    Astronomia / física
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