Enhancement of 2-butanone sensing properties of SiO2@CoO core-shell structures

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dc.contributor.authorVioto, Gabriel C.N. [UNESP]
dc.contributor.authorPerfecto, Tarcísio M. [UNESP]
dc.contributor.authorZito, Cecilia A. [UNESP]
dc.contributor.authorVolanti, Diogo P. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2020-12-12T01:27:40Z
dc.date.available2020-12-12T01:27:40Z
dc.date.issued2020-10-01
dc.description.abstractVolatile organic compounds (VOCs) can be associated with some diseases when found in human exhaled breath as a result of alterations in metabolic pathways. Therefore, the development of highly selective sensors to a particular VOC is required. In this paper, we used silica (SiO2) nanospheres as support for the growth of cobalt (II) oxide (CoO) nanosheets, resulting in the SiO2@CoO core-shell structure with a high specific surface area. This structure was applied as a chemoresistive VOCs sensor. The SiO2@CoO material exhibited increased sensitivity to 2-butanone in comparison with acetone, methanol, ethanol, isopropanol, acetaldehyde, benzene, toluene, and m-xylene. The response to 100 ppm of 2-butanone was ~44.7, with a response time of 27 s. The enhanced performance might be attributed to the high surface area provided by the unique core-shell structure with 2D CoO nanosheets.en
dc.description.affiliationLaboratory of Materials for Sustainability (LabMatSus) Ibilce São Paulo State University (Unesp), R. Cristóvão Colombo, 2265
dc.description.affiliationUnespLaboratory of Materials for Sustainability (LabMatSus) Ibilce São Paulo State University (Unesp), R. Cristóvão Colombo, 2265
dc.format.extent22692-22698
dc.identifierhttp://dx.doi.org/10.1016/j.ceramint.2020.06.032
dc.identifier.citationCeramics International, v. 46, n. 14, p. 22692-22698, 2020.
dc.identifier.doi10.1016/j.ceramint.2020.06.032
dc.identifier.issn0272-8842
dc.identifier.scopus2-s2.0-85086476396
dc.identifier.urihttp://hdl.handle.net/11449/198989
dc.language.isoeng
dc.relation.ispartofCeramics International
dc.sourceScopus
dc.subjectCobalt oxide
dc.subjectGas sensor
dc.subjectHard-template
dc.subjectP-type semiconductor
dc.subjectSelectivity
dc.subjectVolatile organic compounds
dc.titleEnhancement of 2-butanone sensing properties of SiO2@CoO core-shell structuresen
dc.typeArtigo

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