Publicação:
Selective NO2 Detection of CaCu3Ti4O12 Ceramic Prepared by the Sol-Gel Technique and DRIFT Measurements to Elucidate the Gas Sensing Mechanism

dc.contributor.authorEspinoza-González, Rodrigo
dc.contributor.authorCaamaño, Josefa
dc.contributor.authorCastillo, Ximena
dc.contributor.authorOrlandi, Marcelo O. [UNESP]
dc.contributor.authorFelix, Anderson A. [UNESP]
dc.contributor.authorFlores, Marcos
dc.contributor.authorBlanco, Adriana
dc.contributor.authorCastro-Castillo, Carmen
dc.contributor.authorGracia, Francisco
dc.contributor.institutionUniversidad de Chile
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2023-07-29T13:14:32Z
dc.date.available2023-07-29T13:14:32Z
dc.date.issued2023-05-01
dc.description.abstractNO2 is one of the main greenhouse gases, which is mainly generated by the combustion of fossil fuels. In addition to its contribution to global warming, this gas is also directly dangerous to humans. The present work reports the structural and gas sensing properties of the CaCu3Ti4O12 compound prepared by the sol-gel technique. Rietveld refinement confirmed the formation of the pseudo-cubic CaCu3Ti4O12 compound, with less than 4 wt% of the secondary phases. The microstructural and elemental composition analysis were carried out using scanning electron microscopy and X-ray energy dispersive spectroscopy, respectively, while the elemental oxidation states of the samples were determined by X-ray photoelectron spectroscopy. The gas sensing response of the samples was performed for different concentrations of NO2, H2, CO, C2H2 and C2H4 at temperatures between 100 and 300 °C. The materials exhibited selectivity for NO2, showing a greater sensor signal at 250 °C, which was correlated with the highest concentration of nitrite and nitrate species on the CCTO surface using DRIFT spectroscopy.en
dc.description.affiliationLabMAM Department of Chemical Engineering Biotechnology and Materials FCFM Universidad de Chile
dc.description.affiliationDepartment of Engineering Physics and Mathematics Sao Paulo State University (UNESP)
dc.description.affiliationPhysics Department FCFM Universidad de Chile
dc.description.affiliationUnespDepartment of Engineering Physics and Mathematics Sao Paulo State University (UNESP)
dc.identifierhttp://dx.doi.org/10.3390/ma16093390
dc.identifier.citationMaterials, v. 16, n. 9, 2023.
dc.identifier.doi10.3390/ma16093390
dc.identifier.issn1996-1944
dc.identifier.scopus2-s2.0-85159363107
dc.identifier.urihttp://hdl.handle.net/11449/247383
dc.language.isoeng
dc.relation.ispartofMaterials
dc.sourceScopus
dc.subjectCCTO
dc.subjectDRIFT spectroscopy
dc.subjectgas sensor
dc.subjectNO2 selectivity
dc.titleSelective NO2 Detection of CaCu3Ti4O12 Ceramic Prepared by the Sol-Gel Technique and DRIFT Measurements to Elucidate the Gas Sensing Mechanismen
dc.typeArtigo
dspace.entity.typePublication
unesp.author.orcid0000-0003-1119-9716[1]
unesp.author.orcid0000-0002-2054-3235[4]
unesp.author.orcid0000-0003-0321-9668[5]

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