Self-assembled films based on polypyrrole and carbon nanotubes composites for the determination of Diuron pesticide

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dc.citation.issue5
dc.citation.volumev. 22
dc.contributor.authorAraujo, Gabriela Martins de [UNIFESP]
dc.contributor.authorSimões, Fabio Ruiz [UNIFESP]
dc.coverageNew York
dc.date.accessioned2020-07-20T16:30:54Z
dc.date.available2020-07-20T16:30:54Z
dc.date.issued2018
dc.description.abstractIn this work, polypyrrole (PPy) and its respective composite with functionalized multi-walled carbon nanotubes (MWCNT) were obtained by chemical polymerization of the monomer pyrrole in aqueous solution. The obtained PPy as well as its composite (PPy-MWCNT) were characterized by Fourier transform infrared spectroscopy (FTIR) and were used to produce nanostructured self-assembled (SA) films deposited onto glass substrates covered with indium tin oxide (ITO). The SA films were produced with alternated layers of polystyrene sulphonated (PSS) and were characterized by UV-visible, cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM) analyses. The applicability of the SA films was evaluated by square wave voltammetry (SWV) with standard additions of aliquots of Diuron pesticide in Britton-Robinson buffer solutions (pH = 2.0). The results showed an oxidation peak at 0.23 V which increases in function of the Diuron concentration for both the SA films. It was also observed that the SA film based on the composite (PPy-MWCNT/PSS) showed a peak current intensity about ten times higher in comparison with its unmodified counterpart (PPy/PSS) for a Diuron concentration of 4.29 x 10(-5) mol L-1, indicating a synergic effect between PPy and MWCNT in the composite. The limits of quantification (LOQ) and limits of detection (LOD) were respectively 8.6 x 10(-7) mol L-1 and 2.6 x 10(-7) mol L-1.en
dc.description.affiliationUniv Fed Sao Paulo, Programa Posgrad Ciencia & Tecnol Sustentabilidad, Campus Diadema, Diadema, SP, Brazil
dc.description.affiliationUniv Fed Sao Paulo, Dept Ciencias Mar, Rua Carvalho Mendonca 144, BR-11070100 Santos, SP, Brazil
dc.description.affiliationUnifespUniv Fed Sao Paulo, Programa Posgrad Ciencia & Tecnol Sustentabilidad, Campus Diadema, Diadema, SP, Brazil
dc.description.affiliationUnifespUniv Fed Sao Paulo, Dept Ciencias Mar, Rua Carvalho Mendonca 144, BR-11070100 Santos, SP, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipSao Paulo Research Foundation (FAPESP)
dc.description.sponsorshipCAPES
dc.description.sponsorshipIDFAPESP: 2014/23858-3
dc.format.extent1439-1448
dc.identifierhttp://dx.doi.org/10.1007/s10008-017-3807-9
dc.identifier.citationJournal Of Solid State Electrochemistry. New York, v. 22, n. 5, p. 1439-1448, 2018.
dc.identifier.doi10.1007/s10008-017-3807-9
dc.identifier.issn1432-8488
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/55584
dc.identifier.wosWOS:000430301800019
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofJournal Of Solid State Electrochemistry
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectPolypyrroleen
dc.subjectCarbon nanotubesen
dc.subjectSelf-assembled filmsen
dc.subjectDiuronen
dc.titleSelf-assembled films based on polypyrrole and carbon nanotubes composites for the determination of Diuron pesticideen
dc.typeinfo:eu-repo/semantics/article
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