The Ultra-sensitive Electrochemical Detection of As(III) in Ground Water Using Disposable L-cysteine/Lipoic Acid Functionalised Gold Nanoparticle Modified Screen-Printed Electrodes

Jijana, Abongile Nwabisa; Mphuthi, Ntsoaki; Shumbula, Poslet; Vilakazi, Sibulelo; Sikhwivhilu, Lucky

doi:10.1007/s12678-021-00658-7

Cited by 21 publications

(9 citation statements)

References 46 publications

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“…The LODs and LOQs estimated for the hybrid electrodes have been found extremely promising, since they are of the same order of magnitude of the limits imposed by the directives and laws on the maximum amount of As in public water supplies (i.e., 10 ppb as established by U.S. EPA) and also in line with the values reported for other electrochemical sensors based on Au-graphene hybrids [16,[18][19][20] (Table S1 of Supporting Information).…”

Section: Electroanalytical Applications Of Pca-rgo/aunps Hybrid Nanoc...supporting

confidence: 76%

“…The results have shown that the hybrid modified electrodes presented enhanced conductivity and electroactivity compared to its single components and the layer-by-layer PCA-RGO@Au NPs junction. They also have demonstrated a higher sensitivity in the detection of As(III), with a LOD of the same order of magnitude of the limits imposed by the directives and laws on the maximum amount of As in public water supplies (i.e., 10 ppb as established by USA EPA) and of those reported in literature [16,[18][19][20]. These results have been ascribed to the crucial role of the PCA linker behaving as a coupling agent at the RGO-Au NPs interphase, effectively merging the unique properties of the hybrid components and resulting in enhanced electrochemical activity.…”

Section: Introductionmentioning

confidence: 78%

“…Immunosensors have been reported to use nanostructured platforms in the electroanalytical determination of As(III), particularly with anodic stripping voltammetry (ASV)), by exploiting the excellent redox electrocatalytic activity of Au NPs and high rate of electron transfer kinetics at the electrode/electrolyte interface [15]. Screen-printed electrodes (SPCEs), modified by Au NPs coated by L-cysteine conjugated to reduced lipoic acid, have been used for the detection of As(III) in ground water by square-wave anodic stripping voltammetry (SWV-ASV) [16].…”

Section: Introductionmentioning

confidence: 99%

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Au Nanoparticles Decorated Graphene-Based Hybrid Nanocomposite for As(III) Electroanalytical Detection

et al. 2022

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Electrochemical sensors integrating hybrid nanostructured platforms are a promising alternative to conventional detection techniques for addressing highly relevant challenges of heavy metal determination in the environment. Hybrid nanocomposites based on graphene derivatives and inorganic nanoparticles (NPs) are ideal candidates as active materials for detecting heavy metals, as they merge the relevant physico-chemical properties of both the components, finally leading to a rapid and sensitive current response. In this work, a hybrid nanocomposite formed of reduced graphene oxide (RGO) sheets, surface functionalized by π-π interactions with 1-pyrene carboxylic acid (PCA), and decorated in situ by Au NPs, was synthesized by using a colloidal route. The hybrid nanocomposite was characterized by cyclic voltammetry and electrochemical impedance spectroscopy with respect to the corresponding single components, both bare and deposited as a layer-by-layer junction onto the electrode. The results demonstrated the high electrochemical activity of the hybrid nanocomposite with respect to the single components, highlighting the crucial role of the nanostructured surface morphology of the electrode and the PCA coupling agent at the NPs-RGO interphase in enhancing the nanocomposite electroactivity. Finally, the Au NP-decorated PCA-RGO sheets were tested by anodic stripping voltammetry of As(III) ion—a particularly relevant analyte among heavy metal ions—in order to assess the sensing ability of the nanocomposite material with respect to its single components. The nanocomposite has been found to present a sensitivity higher than that characterizing the bare components, with LODs complying with the directives established by the U.S. EPA and in line with those reported for state-of-the-art electrochemical sensors based on other Au-graphene nanocomposites.

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Section: Electroanalytical Applications Of Pca-rgo/aunps Hybrid Nanoc...supporting

confidence: 76%

Section: Introductionmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

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Au Nanoparticles Decorated Graphene-Based Hybrid Nanocomposite for As(III) Electroanalytical Detection

et al. 2022

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“…12 Arsenic has been detected using gold nanoparticles and gold electrodes in various studies. [13][14][15][16][17][18] Looking at a cheaper alternative, silver nanoparticles instead of gold This journal is © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2023 nanoparticles are less explored for the electrochemical quantification of arsenic in water bodies. 19 AgNPs are found to help in the enhancement of the electroactive surface area due to their small size and excellent electroactivity.…”

Section: Introductionmentioning

confidence: 99%

Ion-imprinted chitosan-stabilized biogenic silver nanoparticles for the electrochemical detection of arsenic (iii) in water samples

Agnihotri

Varghese

et al. 2023

New J. Chem.

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“…1 Detection of metal ions through stripping voltammetry has been widely reported. [2][3][4][5][6][7] The detection effect of stripping voltammetry is closely related to the working electrode. Glassy carbon electrodes (GCEs) are commonly used detection electrodes.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous determination of cadmium(ii), lead(ii), copper(ii) and mercury(ii) using an electrode modified by N/S co-doped graphene

Tan

Wang

et al. 2022

New J. Chem.

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The Ultra-sensitive Electrochemical Detection of As(III) in Ground Water Using Disposable L-cysteine/Lipoic Acid Functionalised Gold Nanoparticle Modified Screen-Printed Electrodes

Cited by 21 publications

References 46 publications

Au Nanoparticles Decorated Graphene-Based Hybrid Nanocomposite for As(III) Electroanalytical Detection

Au Nanoparticles Decorated Graphene-Based Hybrid Nanocomposite for As(III) Electroanalytical Detection

Ion-imprinted chitosan-stabilized biogenic silver nanoparticles for the electrochemical detection of arsenic (iii) in water samples

Simultaneous determination of cadmium(ii), lead(ii), copper(ii) and mercury(ii) using an electrode modified by N/S co-doped graphene

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