Room-temperature volatile organic compounds sensing based on WO3·0.33H2O, hexagonal-WO3, and their reduced graphene oxide composites

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dc.contributor.authorPerfecto, T. M. [UNESP]
dc.contributor.authorZito, C. A. [UNESP]
dc.contributor.authorVolanti, D. P. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-12-11T16:44:31Z
dc.date.available2018-12-11T16:44:31Z
dc.date.issued2016-01-01
dc.description.abstractNanostructured orthorhombic WO3·0.33H2O, hexagonal h-WO3 and their RGO composites (RGO-WO3·0.33H2O and RGO-h-WO3) are reported for the purpose of efficient sensing of volatile organic compounds (VOCs) (e.g. acetone, methanol, benzene, toluene, and m-xylene). The materials were prepared at 140 °C by one-pot microwave-assisted hydrothermal (MAH) synthesis from Na2WO4·2H2O and graphite oxide (in the case of composite) suspension in acid medium, without using any reducing, organic, or capping reagent. A three-dimensional (3D) nanocolumn bundles-like morphology was obtained for WO3·0.33H2O and RGO-WO3·0.33H2O. Whereas with subsequent heat treatment at 400 °C, it was possible to obtain h-WO3 and RGO-h-WO3 composites while preserving the nanocolumn bundles-like morphology. The sensing properties of these materials were investigated by exposing them to various VOCs at room temperature and at 55% relative humidity. We found that all the materials behave as a p-type semiconductor after being exposed to reducing gases. Response to 100 ppm of acetone to the RGO-h-WO3 sensor was observed to be 20% larger than the h-WO3 sensor.en
dc.description.affiliationLabMatSus-Laboratory of Materials for Sustainability IBILCE UNESP-Univ Estadual Paulista, Rua Cristóvão Colombo, 2265
dc.description.affiliationUnespLabMatSus-Laboratory of Materials for Sustainability IBILCE UNESP-Univ Estadual Paulista, Rua Cristóvão Colombo, 2265
dc.format.extent105171-105179
dc.identifierhttp://dx.doi.org/10.1039/c6ra16892b
dc.identifier.citationRSC Advances, v. 6, n. 107, p. 105171-105179, 2016.
dc.identifier.doi10.1039/c6ra16892b
dc.identifier.issn2046-2069
dc.identifier.lattes2354739980406725
dc.identifier.orcid0000-0001-9315-9392
dc.identifier.scopus2-s2.0-84994512664
dc.identifier.urihttp://hdl.handle.net/11449/169110
dc.language.isoeng
dc.relation.ispartofRSC Advances
dc.relation.ispartofsjr0,863
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.titleRoom-temperature volatile organic compounds sensing based on WO3·0.33H2O, hexagonal-WO3, and their reduced graphene oxide compositesen
dc.typeArtigo
unesp.author.lattes2354739980406725[3]
unesp.author.orcid0000-0001-9315-9392[3]

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