Imparting improvements in electrochemical sensors: evaluation of different carbon blacks that give rise to significant improvement in the performance of electroanalytical sensing platforms

Autor(es)

Vicentini, Fernando Campanha ^[1] ; Ravanini, Amanda E. ^[1] ; Figueiredo-Filho, Luiz C. S. ^[1] ; Iniesta, Jesus ^{[2, 3]} ; Banks, Craig E. ^[4] ; Fatibello-Filho, Orlando ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Chem, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Alicante, Dept Phys Chem, Alicante 03690 - Spain

^[3] Univ Alicante, Inst Electrochem, Alicante 03690 - Spain

^[4] Manchester Metropolitan Univ, Fac Sci & Engn, Sch Sci & Environm, Div Chem & Environm Sci, Manchester M1 5GD, Lancs - England

• Tipo de documento: Artigo Científico
• Fonte: Electrochimica Acta; v. 157, p. 125-133, MAR 1 2015.
• Citações Web of Science: 53

Resumo

Three different carbon black materials have been evaluated as a potential modifier, however, only one demonstrated an improvement in the electrochemical properties. The carbon black structures were characterised with SEM, XPS and Raman spectroscopy and found to be very similar to that of amorphous graphitic materials. The modifications utilised were constructed by three different strategies (using ultrapure water, chitosan and dihexadecylphosphate). The fabricated sensors are electrochemically characterised using N,N,N',N'-tetramethyl-para-phenylenediamine and both inner-sphere and outer-sphere redox probes, namely potassium ferrocyanide(II) and hexaammineruthenium(III) chloride, in addition to the biologically relevant and electroactive analytes, dopamine (DA) and acetaminophen (AP). Comparisons are made with an edge-plane pyrolytic graphite and glassy-carbon electrode and the benefits of carbon black implemented as a modifier for sensors within electrochemistry are explored, as well as the characterisation of their electroanalytical performances. We reveal significant improvements in the electrochemical performance (excellent sensitivity, faster heterogeneous electron transfer rate (HET)) over that of a bare glassy-carbon and edge-plane pyrolytic graphite electrode and thus suggest that there are substantial advantages of using carbon black as modifier in the fabrication of electrochemical based sensors. Such work is highly important and informative for those working in the field of electroanalysis where electrochemistry can provide portable, rapid, reliable and accurate sensing protocols (bringing the laboratory into the field), with particular relevance to those searching for new electrode materials. (C) 2014 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 10/20754-1 - Desenvolvimento de sensores eletroquímicos utilizando nanomateriais para a determinação de espécies de interesse farmacêutico e ambiental
• Beneficiário: Luiz Carlos Soares de Figueiredo Filho
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 14/04284-6 - Estudos eletroquímicos e aplicação de sensores a base de grafeno ou carbono vítreo reticulado 3-D modificados com nanopartículas metálicas para a determinação de analitos de interesse farmacêutico e ambiental.
• Beneficiário: Luiz Carlos Soares de Figueiredo Filho
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/16770-0 - Desenvolvimento de sensores à base de filmes poliméricos e nanomateriais para aplicações analíticas diversas
• Beneficiário: Fernando Campanhã Vicentini
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado