Factorial design optimization of redox properties of methylene blue adsorbed on a modified silica gel surface

dc.creatorRocha, RF
dc.creatorRosatto, SS
dc.creatorBruns, RE
dc.creatorKubota, LT
dc.date1997
dc.dateAUG 15
dc.date2014-12-16T11:35:42Z
dc.date2015-11-26T17:08:45Z
dc.date2014-12-16T11:35:42Z
dc.date2015-11-26T17:08:45Z
dc.date.accessioned2018-03-28T23:57:25Z
dc.date.available2018-03-28T23:57:25Z
dc.identifierJournal Of Electroanalytical Chemistry. Elsevier Science Sa Lausanne, v. 433, n. 41671, n. 73, n. 76, 1997.
dc.identifier0022-0728
dc.identifierWOS:A1997YJ74300008
dc.identifier10.1016/S0022-0728(97)00146-0
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/66664
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/66664
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/66664
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1280454
dc.descriptionMethylene blue immobilized on silica surfaces modified with titanium dioxide and titanium phosphate were used in carbon paste mixtures to prepare electrodes. The electrochemical properties of methylene blue were investigated by cyclic voltammetry. The electron mediator property of the dye was optimized using a factorial design, consisting of two levels and three factors. The factorial analysis was carried out by searching for better reversibility of the redox process, i.e. the lowest separation between anodic and cathodic peak potentials and a current ratio near unity. The supporting electrolyte concentration has a small effect. The interaction between pH and the silica support was very significant for the peak separation. The solution pH has a significant effect on the current ratio. Lower values for peak separation were observed at pH 4.0 for STM and pH 7.0 for STPM. However, the current ratio was closer to unity for pH 4.0 in both cases. (C) 1997 Elsevier Science S.A.
dc.description433
dc.description41671
dc.description73
dc.description76
dc.languageen
dc.publisherElsevier Science Sa Lausanne
dc.publisherLausanne
dc.publisherSuíça
dc.relationJournal Of Electroanalytical Chemistry
dc.relationJ. Electroanal. Chem.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectfactorial design
dc.subjectmodified electrode
dc.subjectmethylene blue
dc.subjectmodified silica
dc.subjectCarbon-paste Electrodes
dc.subjectTitanium(iv) Oxide
dc.subjectMeldolas-blue
dc.subjectBiosensor
dc.titleFactorial design optimization of redox properties of methylene blue adsorbed on a modified silica gel surface
dc.typeArtículos de revistas


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