Bismuth modified gold nanoelectrode ensemble for stripping voltammetric determination of lead

Mardegan, Andrea; Borgo, S. Dal; Scopece, Paolo; Moretto, Ligia Maria; Hočevar, Samo B.; Ugo, Paolo

doi:10.1016/j.elecom.2012.08.012

Cited by 19 publications

(16 citation statements)

References 27 publications

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“…In the last years the properties and advantageous characteristics of array of nanoelectrodes to be employed as sensitive voltammetric sensors have been demonstrated [1][2][3][4][5][6][7]. The largest part of these studies was developed using ensembles of gold nanoelectrodes (NEEs) prepared via electroless deposition.…”

Section: Introductionmentioning

confidence: 99%

Arrays of copper nanowire electrodes: Preparation, characterization and application as nitrate sensor

Stortini

Moretto

Mardegan

et al. 2015

Sensors and Actuators B: Chemical

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104

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a b s t r a c tEnsembles of copper nanowire electrodes (CuWNEEs) are prepared via electrodeposition in track-etched polycarbonate membranes. Three different preparation methods are compared showing that the better results in terms of sensor durability and reproducibility are achieved by pre-sputtering a thin gold film on the templating membrane and attaching it to a supporting electrode by exploiting the adhesion property and ionic conductivity of a thin Nafion interlayer. SEM-EDS analyses together with double layer charging currents measurements indicate that these arrays are formed by copper nanowires with 400 nm diameter, 10 m length distributed with a spatial density of 1 × 10 8 nanowires/cm 2 . The voltammetric reduction of nitrate at CuWNEEs is characterized by a well-resolved cathodic peak at approximately −0.680 V vs Ag/AgCl, whose current scales linearly with the nitrate concentration in the 10-400 M range. The limit of detection (LOD) achieved by simple linear sweep voltammetry is in the 1.7-3.0 M range, depending on the CuWNEE preparation method, such LOD values being among the lowest reported up to now in the literature. The possibility to use CuWNEEs in chloride and nitrite containing water samples is demonstrated.

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Section: Introductionmentioning

confidence: 99%

Arrays of copper nanowire electrodes: Preparation, characterization and application as nitrate sensor

Stortini

Moretto

Mardegan

et al. 2015

Sensors and Actuators B: Chemical

Self Cite

104

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“…Only few papers report on the application of bismuthmodified gold electrodes for anodic (or adsorptive/cathodic) stripping voltammetry/potentiometry [21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Adsorptive Cathodic Stripping Voltammetric Determination of Nickel(II) and Cobalt(II) at an In Situ Bismuth‐Modified Gold Electrode

et al. 2013

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A study on the simultaneous determination of Ni(II) and Co(II) dimethylglyoximates (Ni-DMG and Co-DMG) through adsorptive cathodic stripping voltammetry at an in situ bismuth-modified gold electrode (Bi-AuE) is reported. The key operational parameters, such as Bi(III) concentration, accumulation potential and accumulation time were optimized and the morphology of the Bi-microcrystals deposited on the Au-electrode was studied. The BiAuE allowed convenient analysis of trace concentrations of solely Ni(II) or of Ni(II) and Co(II) together, with cathodic stripping voltammograms characterized by well-separated stripping peaks. The calculated limit of detection (LOD) was 40 ng L À1 for Ni(II) alone, whereas the LOD was 98 ng L À1 for Ni(II) and 58 ng L À1 for Co(II), when both metal ions were measured together. The optimized method was finally applied to the analysis of certified spring water (NIST1640a) and of natural water sampled in the Lagoon of Venice. The results obtained with the BiAuE were in satisfactory agreement with the certified values and with those provided by complementary techniques, i.e., ICP-OES and ICP-MS.

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“…The stripping peak current increased when increasing the Bi(III) concentration from 2.5 mg•L −1 up to reaching an approximately constant value at a Bi(III) concentration ≥10 mg•L −1 . At Bi-PPCE, the Ni(II) signal is observed at a Bi(III) concentration lower than at the Bi-Au electrode [34]; this behavior is due to the higher overpotential for hydrogen evolution observed at carbon with respect to gold electrodes [22]. The concentration of 10 mg•L −1 of Bi(III) was then chosen to carry out nickel determination.…”

Section: M(ii)-dmg2 (Ads) + Ne −  M(ii)-dmg2 N− (2)mentioning

confidence: 99%

“…Bismuth electrodes have been successfully applied in anodic [20][21][22] and cathodic or adsorptive stripping voltammetry (AdCSV) [23,24]. The latter technique relies on the interfacial accumulation of a complex of the target metal on the surface of the working electrode; this is an interesting approach, especially when the analyte cannot form an amalgam/alloy [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Pyrolyzed Photoresist Carbon Electrodes for Trace Electroanalysis of Nickel(II)

et al. 2015

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Novel pyrolyzed photoresist carbon electrodes for electroanalytical applications have been produced by photolithographic technology followed by pyrolysis of the photoresist. A study of the determination of Ni(II) dimethylglyoximate (Ni-DMG) through adsorptive cathodic stripping voltammetry at an in situ bismuth-modified pyrolyzed photoresist electrode (Bi-PPCE) is reported. The experimental conditions for the deposition of a bismuth film on the PPCE were optimized. The Bi-PPCE allowed the analysis of trace concentrations of Ni(II), even in the presence of Co(II), which is the main interference in this analysis, with cathodic stripping square wave voltammograms characterized by well-separated stripping peaks. The calculated limits of detection (LOD) were 20 ng•L −1 for Ni(II) alone and 500 ng•L −1 in the presence of Co(II). The optimized method was finally applied to the analysis of certified spring water (NIST1640a).

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Bismuth modified gold nanoelectrode ensemble for stripping voltammetric determination of lead

Cited by 19 publications

References 27 publications

Arrays of copper nanowire electrodes: Preparation, characterization and application as nitrate sensor

Arrays of copper nanowire electrodes: Preparation, characterization and application as nitrate sensor

Simultaneous Adsorptive Cathodic Stripping Voltammetric Determination of Nickel(II) and Cobalt(II) at an In Situ Bismuth‐Modified Gold Electrode

Pyrolyzed Photoresist Carbon Electrodes for Trace Electroanalysis of Nickel(II)

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