Electrochemical sensor based on carbon nanotube decorated with manganese oxide nanoparticles for naphthalene determination

dc.contributor.authorAlves, Ismael Carlos Braga
dc.contributor.authordos Santos, José Ribamar Nascimento
dc.contributor.authorMarques, Edmar Pereira
dc.contributor.authorSousa, Janyeid Karla Castro
dc.contributor.authorBeluomini, Maísa Azevedo [UNESP]
dc.contributor.authorStradiotto, Nelson Ramos [UNESP]
dc.contributor.authorMarques, Aldaléa Lopes Brandes
dc.contributor.institutionFederal University of Maranhão (UFMA)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2023-07-29T16:15:44Z
dc.date.available2023-07-29T16:15:44Z
dc.date.issued2023-01-01
dc.description.abstractIn this work, an electrochemical sensor was developed for the determination of naphthalene (NaP) in well water samples, based on a glass carbon electrode (GCE) modified as a nanocomposite of manganese oxides (MnOx) and COOH-functionalized multi-walled carbon nanotubes (MWCNT). The synthesis of MnOx nanoparticles was performed by the sol–gel method. The nanocomposite was obtained by mixing MnOx and MWCNT with the aid of ultrasound, followed by stirring for 24 h. Surface modification facilitated the electron transfer process through the MnOx/MWCNT/GCE composite, which was used as an electrochemical sensor. The sensor and its material were characterized by cyclic voltammetry (CV), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). Important parameters influencing electrochemical sensor performance (pH, composite ratios) were investigated and optimized. The MnOx/MWCNT/GCE sensor showed a wide linear range of 2.0–16.0 μM, a detection limit of 0.5 μM and a quantification limit of 1.8 μM, in addition to satisfactory repeatability (RSD of 7.8%) and stability (900 s) in the determination of NaP. The determination of NaP in a sample of water from a gas station well using the proposed sensor showed results with recovery between 98.1 and 103.3%. The results obtained suggest that the MnOx/MWCNT/GCE electrode has great potential for application in the detection of NaP in well water. Graphical abstract: [Figure not available: see fulltext.]en
dc.description.affiliationNEEP (LPQA & LAPQAP) PPG-BIONORTE Federal University of Maranhão (UFMA), MA
dc.description.affiliationInstitute of Chemistry São Paulo State University (UNESP), São Paulo
dc.description.affiliationUnespInstitute of Chemistry São Paulo State University (UNESP), São Paulo
dc.identifierhttp://dx.doi.org/10.1007/s44211-023-00374-w
dc.identifier.citationAnalytical Sciences.
dc.identifier.doi10.1007/s44211-023-00374-w
dc.identifier.issn1348-2246
dc.identifier.issn0910-6340
dc.identifier.scopus2-s2.0-85160849049
dc.identifier.urihttp://hdl.handle.net/11449/250024
dc.language.isoeng
dc.relation.ispartofAnalytical Sciences
dc.sourceScopus
dc.subjectElectrochemical sensor
dc.subjectMnOx
dc.subjectMWCNT
dc.subjectNanocomposite
dc.subjectNaphthalene
dc.titleElectrochemical sensor based on carbon nanotube decorated with manganese oxide nanoparticles for naphthalene determinationen
dc.typeArtigo
unesp.author.orcid0000-0002-9331-3457[1]

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