An Electrochemical Sensor Based on Nanostructured Hollandite-type Manganese Oxide for Detection of Potassium Ions

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorLima, Alex S.
dc.creatorBocchi, Nerilso
dc.creatorGomes, Homero M.
dc.creatorTeixeira, Marcos F. S.
dc.date2014-05-20T13:23:09Z
dc.date2014-05-20T13:23:09Z
dc.date2009-09-01
dc.date.accessioned2017-04-05T19:56:45Z
dc.date.available2017-04-05T19:56:45Z
dc.identifierSensors. Basel: Molecular Diversity Preservation International-mdpi, v. 9, n. 9, p. 6613-6625, 2009.
dc.identifier1424-8220
dc.identifierhttp://hdl.handle.net/11449/6941
dc.identifier10.3390/s90906613
dc.identifierWOS:000270213300002
dc.identifierWOS000270213300002.pdf
dc.identifierhttp://dx.doi.org/10.3390/s90906613
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/855747
dc.descriptionThe participation of cations in redox reactions of manganese oxides provides an opportunity for development of chemical sensors for non-electroactive ions. A sensor based on a nanostructured hollandite-type manganese oxide was investigated for voltammetric detection of potassium ions. The detection is based on the measurement of anodic current generated by oxidation of Mn(III) to Mn(IV) at the surface of the electrode and the subsequent extraction of the potassium ions into the hollandite structure. In this work, an amperometric procedure at an operating potential of 0.80 V (versus SCE) is exploited for amperometric monitoring. The current signals are linearly proportional to potassium ion concentration in the range 4.97 x 10(-5) to 9.05 x 10(-4) mol L(-1), with a correlation coefficient of 0.9997.
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageeng
dc.publisherMolecular Diversity Preservation International-mdpi
dc.relationSensors
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjecthollandite-type manganese oxide
dc.subjectpotassium ion
dc.subjectinsertion electrochemical
dc.titleAn Electrochemical Sensor Based on Nanostructured Hollandite-type Manganese Oxide for Detection of Potassium Ions
dc.typeOtro


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