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Volatile Organic Compound Monitoring during Extreme Wildfires

2022-09-03Artigo científico Acesso aberto
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dc.contributor.authorMagro, Cátia
dc.contributor.authorGonçalves, Oriana C.
dc.contributor.authorMorais, Marcelo
dc.contributor.authorRibeiro, Paulo A.
dc.contributor.authorSério, Susana
dc.contributor.authorVieira, Pedro
dc.contributor.authorRaposo, Maria
dc.contributor.institutionDF – Departamento de Física
dc.contributor.institutionLIBPhys-UNL
dc.contributor.pblMDPI - Multidisciplinary Digital Publishing Institute
dc.date.accessioned2022-11-30T22:12:07Z
dc.date.available2022-11-30T22:12:07Z
dc.date.issued2022-09-03
dc.descriptiongrants no. UIDB/FIS/04559/2020 and no. UIDP/FIS/04559/2020 (LIBPhys) from FCT/MCTES, Portugal.
dc.description.abstractA new theory suggests that flammable gases generated by heated vegetation, in particular the volatile organic compounds (VOC) common to Mediterranean plants, may, under certain topographic and wind conditions, accumulate in locations where, after the arrival of the ignition source, they rapidly burst into flames as explosions. Hence, there is a need for the development of a system that can monitor the development of these compounds. In this work, a sensor's array is proposed as a method for monitoring the amount of eucalyptol and α-pinene, the major VOC compounds of the Eucalyptus and Pine trees. The detection of the target compounds was assessed using the impedance spectroscopy response of thin films. Combinations of layers of polyelectrolytes, such as poly(allylamine hydrochloride) (PAH), polyethyleneimine (PEI), poly(sodium 4-sytrenesulfonate) (PSS) graphene oxide (GO), and non/functionalized multiwall nanotubes (MWCNT-COOH or MWCNT), namely, PAH/GO, PEI/PSS, PEI/GO, PAH/MWCNT, PAH/MWCNT-COOH, films, and TiO2 and ZnO sputtered films, were deposited onto ceramic supports coated with gold interdigitated electrodes. The results showed that concentrations of the target VOCs, within the range of 68 to 999 ppmv, can be easily distinguished by analyzing the impedance spectra, particularly in the case of the ZnO- and PAH/GO-film-based sensors, which showed the best results in the detection of the target compounds. Through principal component analysis (PCA), the best set of features attained for the ZnO and PAH/GO based sensor devices revealed a linear trend of the PCA's first principal component with the concentration within the range 109 and 807 ppmv. Thus, the values of sensitivity to eucalyptol and α-pinene concentrations, which were (2.2 ± 0.3) × 10-4 and (5.0 ± 0.7) × 10-5 per decade, respectively, as well as resolutions of 118 and 136 ppbv, respectively, were identified.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent13
dc.format.extent1962439
dc.identifier.doi10.3390/s22176677
dc.identifier.issn1424-8220
dc.identifier.otherPURE: 46688846
dc.identifier.otherPURE UUID: 9f7efed2-4372-4222-8ebd-ac7ef0e3b209
dc.identifier.otherScopus: 85137591006
dc.identifier.otherPubMed: 36081137
dc.identifier.urihttp://hdl.handle.net/10362/145913
dc.identifier.urlhttps://www.scopus.com/pages/publications/85137591006
dc.language.isoeng
dc.peerreviewedyes
dc.relationinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PCIF%2FGFC%2F0078%2F2018/PT
dc.subjectelectronic nose
dc.subjecteucalyptol
dc.subjectextreme wildfires
dc.subjectimpedance spectroscopy
dc.subjectlayer-by-layer
dc.subjectsputtering
dc.subjectvolatile organic compounds
dc.subjectα-pinene
dc.subjectAnalytical Chemistry
dc.subjectInformation Systems
dc.subjectBiochemistry
dc.subjectAtomic and Molecular Physics, and Optics
dc.subjectInstrumentation
dc.subjectElectrical and Electronic Engineering
dc.titleVolatile Organic Compound Monitoring during Extreme Wildfiresen
dc.title.subtitleAssessing the Potential of Sensors Based on LbL and Sputtering Filmsen
dc.typejournal article
degois.publication.issue17
degois.publication.titleSensors
degois.publication.volume22
dspace.entity.typePublication
oaire.awardNumberPCIF/GFC/0078/2018
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PCIF%2FGFC%2F0078%2F2018/PT
oaire.fundingStream3599-PPCDT
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
relation.isProjectOfPublication6eace25b-d1c2-48f7-972b-8b69008dca9d
relation.isProjectOfPublication.latestForDiscovery6eace25b-d1c2-48f7-972b-8b69008dca9d

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