Glycerol determination by chronoamperometry using Ni(OH)2/RGO on carbon paste electrode

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dc.contributor.authorde Oliveira, João P. J. [UNESP]
dc.contributor.authorde Sá, Acelino C.
dc.contributor.authorde Sousa, Miguel S. P. [UNESP]
dc.contributor.authorZanette, Andréia F. [UNESP]
dc.contributor.authorTorres, Giovanni B.
dc.contributor.authordos Santos, Renivaldo J. [UNESP]
dc.contributor.authorPaim, Leonardo L. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionInstituto Tecnológico Metropolitano
dc.date.accessioned2023-07-29T13:56:17Z
dc.date.available2023-07-29T13:56:17Z
dc.date.issued2023-01-01
dc.description.abstractGlycerol is a by-product obtained in the transesterification reaction together with biodiesel, a necessary renewable fuel. The presence of glycerol in fuel can bring up environmental harm and engine damage, making fuel quality control important. In this context, composite electrodes (CE) were developed with low-cost materials like syringes, copper wire, graphite, and paraffin. The surface of composite electrodes was modified with reduced graphene oxide (RGO) and hydroxide nickel (Ni(OH)2). SEM, EDX, Raman, and FT-IR ATR characterized the developed material. The electrooxidation of glycerol in an alkaline medium containing 0.10 M of NaOH was investigated by CV. In the presence of glycerol, the modified electrode increased the anodic and cathodic peak current with an anodic peak potential shift to 0.54 V. The electrodes were employed in a study of the determination of glycerol in real biodiesel samples by a chronoamperometric technique. The modified electrode showed a sensitivity of 1.63 × 103 µA mM and a LOD for glycerol of 2.24 × 10–5 M (R = 0.996). The mean response time of the modified electrodes to glycerol was 1.85 s. These electrodes show good reproducibility and competitive detection limit compared to the literature. The proposed method presented satisfactory results, with 94.98 and 100.39% sample recoveries. Graphical abstract: [Figure not available: see fulltext.]en
dc.description.affiliationFaculty of Engineering and Sciences São Paulo State University (UNESP), Campus Rosana, 1881 Dos Barrageiros, Av, SP
dc.description.affiliationSchool of Electrical and Computer Engineering University of Campinas (UNICAMP), Av. Albert Einstein 400, SP
dc.description.affiliationSão Carlos Institute of Physics University of São Paulo (USP), SP
dc.description.affiliationPrograma de Ingeniería de Diseño Industrial Instituto Tecnológico Metropolitano, Antioquia
dc.description.affiliationUnespFaculty of Engineering and Sciences São Paulo State University (UNESP), Campus Rosana, 1881 Dos Barrageiros, Av, SP
dc.identifierhttp://dx.doi.org/10.1007/s10800-023-01928-6
dc.identifier.citationJournal of Applied Electrochemistry.
dc.identifier.doi10.1007/s10800-023-01928-6
dc.identifier.issn1572-8838
dc.identifier.issn0021-891X
dc.identifier.scopus2-s2.0-85160244462
dc.identifier.urihttp://hdl.handle.net/11449/248880
dc.language.isoeng
dc.relation.ispartofJournal of Applied Electrochemistry
dc.sourceScopus
dc.subjectChronoamperometry
dc.subjectGlycerol
dc.subjectLiquid–liquid extraction
dc.subjectNickel hydroxide
dc.subjectOxyhydroxide
dc.subjectReduced graphene oxide
dc.titleGlycerol determination by chronoamperometry using Ni(OH)2/RGO on carbon paste electrodeen
dc.typeArtigo

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