Determination of anthracene on Ag-Au alloy nanoparticles/overoxidized-polypyrrole composite modified glassy carbon electrodes

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dc.contributor.authorMailu, Stephen N.
dc.contributor.authorWaryo, Tesfaye T.
dc.contributor.authorNdangili, Peter M.
dc.contributor.authorNgece, Fanelwa R.
dc.contributor.authorBaleg, Abd A.
dc.contributor.authorBaker, Priscilla
dc.contributor.authorIwuoha, Emmanuel I.
dc.date.accessioned2016-12-22T08:43:39Z
dc.date.available2016-12-22T08:43:39Z
dc.date.issued2010
dc.description.abstractA novel electrochemical sensor for the detection of anthracene was prepared by modifying a glassy carbon electrode (GCE) with over-oxidized polypyrrole (PPyox) and Ag-Au (1:3) bimetallic nanoparticles (Ag-AuNPs). The composite electrode (PPyox/Ag-AuNPs/GCE) was prepared by potentiodynamic polymerization of pyrrole on GCE followed by its overoxidation in 0.1 M NaOH. Ag-Au bimetallic nanoparticles were chemically prepared by the reduction of AgNO3 and HAuCl4 using C6H5O7Na3 as the reducing agent as well as the capping agent and then immobilized on the surface of the PPyox/GCE. The nanoparticles were characterized by UV-visible spectroscopy technique which confirmed the homogeneous formation of the bimetallic alloy nanoparticles. Transmission electron microscopy showed that the synthesized bimetallic nanoparticles were in the range of 20–50 nm. The electrochemical behaviour of anthracene at the PPyox/Ag-AuNPs/GCE with Ag: Au atomic ratio 25:75 (1:3) exhibited a higher electrocatalytic effect compared to that observed when GCE was modified with each constituent of the composite (i.e., PPyox, Ag-AuNPs) and bare GCE. A linear relationship between anodic current and anthracene concentration was attained over the range of 3.0 × 10−6 to 3.56 × 10−4 M with a detection limit of 1.69 × 10−7 M. The proposed method was simple, less time consuming and showed a high sensitivity.en_US
dc.identifier.citationMailu, S.N. et al. (2010). Determination of anthracene on Ag-Au alloy nanoparticles/overoxidized-polypyrrole composite modified glassy carbon electrodes. Sensors, 10: 9449-9465en_US
dc.identifier.issn1424-8220
dc.identifier.urihttp://hdl.handle.net/10566/2478
dc.identifier.urihttp://dx.doi.org/10.3390/s101009449
dc.language.isoenen_US
dc.publisherMDPIen_US
dc.rightsAll articles published by MDPI are made immediately available worldwide under an open access license.
dc.subjectOveroxidized-polypyrroleen_US
dc.subjectBimetallic alloy nanoparticlesen_US
dc.subjectAnthraceneen_US
dc.subjectElectrocatalytic effecten_US
dc.subjectTransmission electron microscopyen_US
dc.titleDetermination of anthracene on Ag-Au alloy nanoparticles/overoxidized-polypyrrole composite modified glassy carbon electrodesen_US
dc.typeArticleen_US

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