Articles producció científica> Enginyeria Electrònica, Elèctrica i Automàtica

Synthesis of single crystalline In2O3 octahedra for the selective detection of NO2 and H2 at trace levels

  • Dades identificatives

    Identificador: imarina:9282623
    Handle: https://hdl.handle.net/20.500.11797/imarina9282623
    Autors:
    Roso, SergioBittencourt, CarlaUmek, PolonaGonzalez, OriolGuell, FrankUrakawa, AtsushiLlobet, Eduard
    Resum:
    Single crystalline indium oxide (In2O3) octahedra have been synthesized by means of a vapor phase transport method at high temperature. The resulting material has been characterized by FE-SEM, HR-TEM, XRD, XPS and PL. The gas sensing properties of this material against oxidizing and reducing gases have been examined and the conditions for selectively detecting such gases have been established. A high response towards NO2 has been obtained at a relatively low optimal operating temperature (i.e., 130 °C) and even at room temperature. The fact that the response of the nanomaterial is more than two orders of magnitude higher for NO2 than for H2, even in the presence of ambient moisture, makes it very promising for the selective detection of oxidizing species (at ppb levels) under real ambient conditions. The addition of noble metal nanoparticles (Pt and Pd) combined with an increase in the operating temperature (i.e., 250 °C) significantly increases H2 sensitivity and dramatically decreases the response to NO2. However, in this case, the presence of humidity negatively affects the response to H2. The sensing mechanisms are introduced and discussed. © The Royal Society of Chemistry 2016.

  • Altres:

    Autor segons l'article: Roso, Sergio; Bittencourt, Carla; Umek, Polona; Gonzalez, Oriol; Guell, Frank; Urakawa, Atsushi; Llobet, Eduard
    Departament: Enginyeria Electrònica, Elèctrica i Automàtica
    Autor/s de la URV: Llobet Valero, Eduard
    Paraules clau: Vapor-phase transport method Temperature Synthesis (chemical) Single-crystalline Selective detection Resulting materials Precious metals Palladium Orders of magnitude Operating temperature Nitrogen oxides Metal nanoparticles Gas sensing properties Gas sensing electrodes Crystalline materials Ambient conditions
    Resum: Single crystalline indium oxide (In2O3) octahedra have been synthesized by means of a vapor phase transport method at high temperature. The resulting material has been characterized by FE-SEM, HR-TEM, XRD, XPS and PL. The gas sensing properties of this material against oxidizing and reducing gases have been examined and the conditions for selectively detecting such gases have been established. A high response towards NO2 has been obtained at a relatively low optimal operating temperature (i.e., 130 °C) and even at room temperature. The fact that the response of the nanomaterial is more than two orders of magnitude higher for NO2 than for H2, even in the presence of ambient moisture, makes it very promising for the selective detection of oxidizing species (at ppb levels) under real ambient conditions. The addition of noble metal nanoparticles (Pt and Pd) combined with an increase in the operating temperature (i.e., 250 °C) significantly increases H2 sensitivity and dramatically decreases the response to NO2. However, in this case, the presence of humidity negatively affects the response to H2. The sensing mechanisms are introduced and discussed. © The Royal Society of Chemistry 2016.
    Àrees temàtiques: 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
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    Adreça de correu electrònic de l'autor: eduard.llobet@urv.cat
    Identificador de l'autor: 0000-0001-6164-4342
    Data d'alta del registre: 2024-10-12
    Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referència a l'article segons font original: Journal Of Materials Chemistry c. 4 (40): 9418-9427
    Referència de l'ítem segons les normes APA: Roso, Sergio; Bittencourt, Carla; Umek, Polona; Gonzalez, Oriol; Guell, Frank; Urakawa, Atsushi; Llobet, Eduard (2016). Synthesis of single crystalline In2O3 octahedra for the selective detection of NO2 and H2 at trace levels. Journal Of Materials Chemistry c, 4(40), 9418-9427. DOI: 10.1039/C6TC03218D
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2016
    Tipus de publicació: Journal Publications

  • Paraules clau:

    Chemistry (Miscellaneous),Materials Chemistry,Materials Science, Multidisciplinary,Physics, Applied
    Vapor-phase transport method
    Temperature
    Synthesis (chemical)
    Single-crystalline
    Selective detection
    Resulting materials
    Precious metals
    Palladium
    Orders of magnitude
    Operating temperature
    Nitrogen oxides
    Metal nanoparticles
    Gas sensing properties
    Gas sensing electrodes
    Crystalline materials
    Ambient conditions
    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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