Carbon nanofiber electrode array for the detection of lead

Robinson, Jendai E.; Heineman, William R.; Sagle, Laura; Meyyappan, M.; Koehne, Jessica E.

doi:10.1016/j.elecom.2016.11.002

Cited by 25 publications

(9 citation statements)

References 38 publications

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“…Nafion is a sulfonated cation-exchange polymer, and it has both favorable conductive matrix and anion sites that usually is employed with carbonaceous materials, such as nanofibers [25,26] or nanotubes [20,27] along with developed methods, such as linear sweep voltammetry, differential pulse voltammetry and square wave voltammetry. Mandil and Amine [28] described the use of Nafion to cover Bi-film preplated on SPEs for the determination of Cd and Pb in ceramic leachates.…”

Section: Introductionmentioning

confidence: 99%

Nafion-Protected Sputtered-Bismuth Screen-Printed Electrode for On-site Voltammetric Measurements of Cd(II) and Pb(II) in Natural Water Samples

Frutos-Puerto

Miró

Gil

2019

Sensors

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In this work, we explore the protection with Nafion of commercial sputtered-bismuth screen-printed electrodes (BiSPSPEs), to improve its ability for on-site determination of Cd(II) and Pb(II) ions in ambient water samples. The modified screen-printed platform was coupled with a miniaturized cell, in combination with a battery-operated stirring system and a portable potentiostat operated by a laptop for decentralized electrochemical measurements using Square-Wave Anodic Stripping Voltammetry (SWASV). We also describe a detailed electrode surface characterization by microscopy and surface analysis techniques, before and after the modification with Nafion, to get insight about modification effect on signal size and stability. Optimization of the chemical composition of the medium including the optimization of pH, and instrumental parameters, resulted in a method with detection limits in the low ng/mL range (3.62 and 3.83 ng·mL−1 for Cd and Pb respectively). Our results show an improvement of the sensitivity and stability for Nafion-protected BiSPSPEs in pH = 4.4 medium, and similar or lower detection limits than comparable methods on commercial BiSPSPEs. The values obtained for Pb(II) and Cd(II) in natural water samples agreed well with those obtained by the much more costly Inductively Coupled Plasma Mass Spectrometry, ICP-MS, technique as a reference method (recoveries from 75% to 111%).

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Section: Introductionmentioning

confidence: 99%

Nafion-Protected Sputtered-Bismuth Screen-Printed Electrode for On-site Voltammetric Measurements of Cd(II) and Pb(II) in Natural Water Samples

Frutos-Puerto

Miró

Gil

2019

Sensors

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“…Simultaneous detection of Cd 2+ , Pb 2+ , and Cu 2+ with a low concentration of 0.1 mM, was attributed to the exposed well-dispersed gold nanoparticles and the high electron transport capability of carbon nanofibers. Vertically aligned carbon nanofibers were evaluated for the detection of Pb 2+ by ASV by Robinson et al [ 76 ]. The achieved detection limit reported was 1.73 nM.…”

Section: Recent Nanofibers For Hmis Sensorsmentioning

confidence: 99%

Electrospun Nanofibers and Electrochemical Techniques for the Detection of Heavy Metal Ions

et al. 2021

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Contamination by heavy metals is currently one of the most environmental concerns especially due to the toxicity, pervasiveness, and persistence of these substances. As they are not biodegradable, heavy metals are harmful not only for water, air, and soil but also for human health, even in very low traces. There is therefore a pressing need to develop an efficient, economic, and rapid analysis method to be applied in a wide range of conditions and able to detect very low contaminants concentrations. Currently, the most novel solution in this field is represented by the combination of electrospun nanofibers and highly sensitive electrochemical techniques. It has been proved that nanofibers, due to their outstanding properties, perfectly fit as sensing material when trace concentrations of heavy metals were investigated by anodic stripping voltammetry, envisaged as the most sensitive electrochemical technique for this kind of measurements. This work aims to provide an overview of the latest trends in the detection of contaminants by the simultaneous use of electrospun fibers and anodic stripping voltammetry. Indeed, a clear and comprehensive vision of the current status of this research may drive future improvements and new challenges.

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“…An optimized leucine/MWCNTs sensor for As showed a detection limit as low as 1.67 nM (0.125 ppb), and a glutamine modified MWCNTs sensor reached a detection limit of 37.3 nM (2.79 ppb) for As. Both sensors posed the detection limit well below the EPA requirement for As in drinking water (∼135 nM, 10 ppb) and were demonstrated effective in determining As in waste water . Table summarizes the recent publications of covalently modified CNTs for heavy metal detection.…”

Section: Modified Cnt Electrodesmentioning

confidence: 99%

Carbon Nanotubes Heavy Metal Detection with Stripping Voltammetry: A Review Paper

Wang

Yue

2017

Electroanalysis

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The challenge of heavy metal detection for environmental, industrial and medical purposes has led to the development of many analytical techniques. Stripping voltammetry is a very sensitive electrochemical method and has been widely used for heavy metal detection. Carbon nanotubes, a well-studied carbon material with physical and chemical properties suited for electrode material is commonly employed for sensitive and selective metal detection in electrochemistry. This article reviews the recent (2011-2016) applications of carbon nanotubes as an electrode or electrode surface modifier for heavy metals detection with stripping voltammetry.

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Carbon nanofiber electrode array for the detection of lead

Cited by 25 publications

References 38 publications

Nafion-Protected Sputtered-Bismuth Screen-Printed Electrode for On-site Voltammetric Measurements of Cd(II) and Pb(II) in Natural Water Samples

Nafion-Protected Sputtered-Bismuth Screen-Printed Electrode for On-site Voltammetric Measurements of Cd(II) and Pb(II) in Natural Water Samples

Electrospun Nanofibers and Electrochemical Techniques for the Detection of Heavy Metal Ions

Carbon Nanotubes Heavy Metal Detection with Stripping Voltammetry: A Review Paper

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