A Novel Sensor Based on Manganese azo-Macrocycle/Carbon Nanotubes to Perform the Oxidation and Reduction Processes of Two Diphenol Isomers

dc.creatorSilva, SM
dc.creatorde Oliveira, FM
dc.creatorJustino, DD
dc.creatorKubota, LT
dc.creatorTanaka, AA
dc.creatorDamos, FS
dc.creatorLuz, RDS
dc.date2014
dc.dateMAR
dc.date2014-08-01T18:16:54Z
dc.date2015-11-26T17:01:19Z
dc.date2014-08-01T18:16:54Z
dc.date2015-11-26T17:01:19Z
dc.date.accessioned2018-03-28T23:49:08Z
dc.date.available2018-03-28T23:49:08Z
dc.identifierElectroanalysis. Wiley-v C H Verlag Gmbh, v. 26, n. 3, n. 602, n. 611, 2014.
dc.identifier1040-0397
dc.identifier1521-4109
dc.identifierWOS:000332379700019
dc.identifier10.1002/elan.201300576
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/76584
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/76584
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1278688
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionThe present work describes the development of a selective and sensitive voltammetric sensor for simultaneous determination of catechol (CC) and hydroquinone (HQ), based on a glassy carbon (GC) electrode modified with manganese phthalocyanine azo-macrocycle (MnPc) adsorbed on multiwalled carbon nanotubes (MWCNT). Scanning electron microscopy and scanning electrochemical microscopy were used to characterize the composite material (MnPc/MWCNT) on the glassy carbon electrode surface. The modified electrode showed excellent electrochemical activity towards the simultaneous oxidation and reduction of CC and HQ. On the MnPc/MWCNT/GC electrode, both CC and HQ can generate a pair of quasi-reversible and well-defined redox peaks. Under optimized experimental and operational conditions, the cathodic peak currents were linear over the range 1-600 mu molL(-1) for both CC and HQ, with limits of detection of 0.095 and 0.041 mu molL(-1), respectively. The anodic peak currents were also linear over the range 1-600 mu molL(-1) for both CC and HQ, with limits of detection of 0.096 and 0.048 mu molL(-1), respectively. The proposed method was effectively applied for the simultaneous detection of hydroquinone and catechol in water samples and the results were in agreement with those obtained by a comparative method described in the literature.
dc.description26
dc.description3
dc.description602
dc.description611
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)
dc.descriptionRede Mineira de Quimica
dc.descriptionInstituto Nacional de Ciencia e Tecnologia (INCT) de Bioanalitica
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageen
dc.publisherWiley-v C H Verlag Gmbh
dc.publisherWeinheim
dc.publisherAlemanha
dc.relationElectroanalysis
dc.relationElectroanalysis
dc.rightsfechado
dc.rightshttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dc.sourceWeb of Science
dc.subjectManganese azo-macrocycle
dc.subjectMultiwalled carbon nanotubes
dc.subjectDiphenols
dc.subjectGlassy-carbon Electrode
dc.subjectScanning Electrochemical Microscopy
dc.subjectSensitive Simultaneous Determination
dc.subjectPhenolic-compounds
dc.subjectMesoporous Carbon
dc.subjectCatechol
dc.subjectHydroquinone
dc.subjectNanocomposite
dc.subjectResorcinol
dc.subjectComplexes
dc.titleA Novel Sensor Based on Manganese azo-Macrocycle/Carbon Nanotubes to Perform the Oxidation and Reduction Processes of Two Diphenol Isomers
dc.typeArtículos de revistas


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