Amorphous carbon nitride as an alternative electrode material in electroanalysis: Simultaneous determination of dopamine and ascorbic acid

Medeiros, Roberta Antigo; Matos, Roberto de; Benchikh, A.; Saïdani, B.; Debiemme‐Chouvy, Catherine; Deslouis, C.; Rocha‐Filho, Romeu C.; Fatibello‐Filho, Orlando

doi:10.1016/j.aca.2013.08.018

Cited by 45 publications

(25 citation statements)

References 51 publications

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“…485.1 mV for EPPG and 500.2 mV GCE), after was carried out successive additions of AP into a 0.1 mol L −1 phosphate buffer solution, pH 7.0. , however it is most remarkable the VXC72RCB-CTS/GCE exhibits an improvement over that of EPPG in terms of the observed sensitivity (slope of the calibration plot); usually EPPG shows the best sensitivity among different carbonaceous materials as can found in the literature [6,52,53]. The linear equations for the electroanalytical response using VXC72RCB-CTS/GCE are as follows: j (µAcm DA concentrations have been associated with neurological disorders; thus, the determination of the DA concentration can be very important in diagnostic applications [7,54]. As shown in Fig.…”

Section: Electroanalytical Applicationsmentioning

confidence: 94%

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

Vicentini

Ravanini

Figueiredo-Filho

et al. 2015

Electrochimica Acta

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125

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Imparting improvements in electrochemical sensors: evaluation of different carbon blacks that give rise to significant improvement in the performance of electroanalytical sensing platforms, Electrochimica Acta http://dx.doi.org/10.1016/j.electacta. 2014.11.204 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Graphical abstract Imparting improvements in electrochemical sensorsThree 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.

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Section: Electroanalytical Applicationsmentioning

confidence: 94%

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

Vicentini

Ravanini

Figueiredo-Filho

et al. 2015

Electrochimica Acta

Self Cite

125

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“…25 Some groups have also reported electrochemical responses of nitrogen containing carbon film electrodes. [26][27][28][29][30] However, very few reports studied the relationship between carbon film structures, particularly about chemical bonds and electrocatalytic properties. 9,19 In this work, we studied N-UBM nanocarbon film electrodes with relatively low nitrogen concentration in terms of structural dependence of ORR.…”

Section: Electrocatalytic Reduction Of Oxygenmentioning

confidence: 99%

Structure and Electroanalytical Application of Nitrogen-doped Carbon Thin Film Electrode with Lower Nitrogen Concentration

et al. 2015

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We studied a nitrogen-doped nanocarbon film electrode with a nitrogen concentration of lower than 10.9 at% formed by the unbalanced magnetron (UBM) sputtering method. The sp 3 content in the nitrogen-doped UBM sputtering nanocarbon film (N-UBM film) slightly increases with increasing nitrogen concentration. The nitrogen-containing graphite-like bonding decreases and pyridine-like bonding increases with increasing nitrogen concentration. The N-UBM film has a very smooth surface with an average roughness of 0.1 to 0.3 nm, which is almost independent of nitrogen concentration. The N-UBM film electrode shows a wider potential window (4.1 V) than a pure-UBM film electrode (3.9 V) due to its slight increase in the sp 3 content. The electrocatalytic activity increased with increasing nitrogen concentration, suggesting that the electroactivity is maximum when the nitrogen concentration is around 10.9 at%, which is confirmed by the peak separation of Fe(CN)6 4-. The hydrogen peroxide (H2O2) reduction potentials at the N-UBM film electrode shifted about 0.1 V, and the peak current of H2O2 increased about 4 times.

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“…48 DA and AA coexist in the brain intercellular fluid in different concentrations. Recently, much efforts have been devoted to the development of simultaneous determination of DA and AA by electrochemical techniques, 49 as they are easily electrochemically oxidized. However, the oxidation potential of DA commonly appears similar to that of AA, 50 therefore, various materials have been selected and modified on the surface of the electrode in order to simultaneously detect DA and AA, such as metal nanoparticles, 51 graphene, 52 carbon nanotubes, 53 polymers, 54 or their composite materials.…”

Section: Morphology and Characterization Of Pils/ppyntsmentioning

confidence: 99%

Preparation of poly(ionic liquids)-functionalized polypyrrole nanotubes and their electrocatalytic application to simultaneously determine dopamine and ascorbic acid

et al. 2015

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Novel poly(ionic liquids) functionalized polypyrrole nanotubes (PILs/PPyNTs) were successfully synthesized.1-Vinyl-3-ethylimidazole bromide (VEIB) was polymerized on the surface of novel polymerizable vinyl imidazolium-type IL modified PPyNTs prepared by a covalent method. Due to the modification of PILs, the dispersibility of PILs/PPyNTs in aqueous solution was significantly improved and their surface charge properties were obviously changed to electropositivity. Because of the synergetic effects of conductive PPyNTs and biocompatible PILs, excellent electrochemical catalytic activities towards dopamine (DA) and ascorbic acid (AA) were achieved using a PILs/PPyNTs modified glassy carbon electrode (GCE), which gave a large potential difference enough to well distinguish DA from AA, with excellent sensitivity and good stability, for the simultaneous detection of DA and AA. The existence of PILs effectively improved the transmission mode of electrons of DA and AA oxidation on the electrode and resulted in their different electrocatalytic performance.

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Amorphous carbon nitride as an alternative electrode material in electroanalysis: Simultaneous determination of dopamine and ascorbic acid

Cited by 45 publications

References 51 publications

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

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

Structure and Electroanalytical Application of Nitrogen-doped Carbon Thin Film Electrode with Lower Nitrogen Concentration

Preparation of poly(ionic liquids)-functionalized polypyrrole nanotubes and their electrocatalytic application to simultaneously determine dopamine and ascorbic acid

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