Voltammetric Sensor Modified by EDTA-immobilized Graphene-like Carbon Nitride Nanosheets: Preparation, Characterization and Selective Determination of Ultra-Trace Pb (II) in Water Samples

Teng, Zhenyuan; Lv, Hongying; Wang, Luona; Liu, Lin; Wang, Chengyin; Wang, Guoxiu

doi:10.1016/j.electacta.2016.07.036

Cited by 39 publications

(17 citation statements)

References 59 publications

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“…Teng et al [169] consider EDTA as modifier of a GCE previously inmobilized in graphene-like carbon nitride nanosheets for the analysis of Pb(II). Zhou et al [170] describe a sensor for Hg(II) analysis, based on a graphene oxide (GO)-AuNPs hybrid indium tin oxide (ITO) electrode modified with 5-methyl-2-thiouracil (MTU).…”

Section: Electrodes Modified With Moleculesmentioning

confidence: 99%

Voltammetric determination of metal ions beyond mercury electrodes. A review

Ariño

Serrano

Dı́az-Cruz

et al. 2017

Analytica Chimica Acta

149

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For a long time mercury electrodes have been the main choice for the analysis of metal ions and some metalloids. However, in the last years, safety and environmental considerations have restricted their use and encouraged the search for alternative materials more environmentally friendly and with more possibilities for in-situ and flow analysis. This research has been reinforced by the popularisation of nanomaterials, biomolecules and screen-printed electrodes, as well as for the new advances in sensor miniaturization and integration of the electrodes in multi-sensor platforms and electronic tongues. The present review critically summarizes and discusses the progress made since 2010 in the development and application of new electrodes for the analysis of metals and metalloids.

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Section: Electrodes Modified With Moleculesmentioning

confidence: 99%

Voltammetric determination of metal ions beyond mercury electrodes. A review

Ariño

Serrano

Dı́az-Cruz

et al. 2017

Analytica Chimica Acta

149

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“…EDTA is an acid that is difficult to biodegrade. It is a stable chelator used in several applications, such as the medical field and the nuclear industry, but it is also used to adsorb heavy ions through functional groups, avoiding their precipitation [78][79][80]. Experiments (results not shown here) indicate that the optimum extraction was obtained by incubating the IIP in EDTA 0.1 M, for 20 min, and by then rinsing the films for 10 min in ultra-pure water.…”

Section: Extraction Time In Edta and Incubation Time In Mercury Solutmentioning

confidence: 84%

High Performance Zinc Oxide Nanorod-Doped Ion Imprinted Polypyrrole for the Selective Electrosensing of Mercury II Ions

et al. 2020

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A biomimetic, ion-imprinted polymer (IIP) was prepared by electropolymerization of pyrrole at the surface of gold electrodes decorated with vertically grown ZnO nanorods. The vertical growth of the nanorods was achieved via an ultrathin aryl monolayer grafted by reduction of diazonium salt precursor. Pyrrole was polymerized in the presence of L-cysteine as chelating agent and Hg2+ (template). Hg2+-imprinted polypyrrole (PPy) was also prepared on a bare gold electrode in order to compare the two methods of sensor design (Au-ZnO-IIP vs. Au-IIP). Non-imprinted PPy was prepared in the same conditions but in the absence of any Hg2+ template. The strategy combining diazonium salt modification and ZnO nanorod decoration of gold electrodes permitted us to increase considerably the specific surface area and thus improve the sensor performance. The limit of detection (LOD) of the designed sensor was ~1 pM, the lowest value ever reported in the literature for gold electrode sensors. The dissociation constants between PPy and Hg2+ were estimated at [Kd1 = (7.89 ± 3.63) mM and Kd2 = (38.10 ± 9.22) pM]. The sensitivity of the designed sensor was found to be 0.692 ± 0.034 μA.pM-1. The Au-ZnO-IIP was found to be highly selective towards Hg2+ compared to cadmium, lead and copper ions. This sensor design strategy could open up new horizons in monitoring toxic heavy metal ions in water and therefore contribute to enhancing environmental quality.

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“…[131] The results demonstrated that using the protonated g-C 3 N 4 nanosheets as am odified electrode for electrochemical sensing exhibited many advantages, such as high sensitivity,f ast analysis speed, and good stability.F or metal-ion sensing,o ur group also prepared ethylenediaminetetraacetic acid immobilized g-C 3 N 4 nanosheets (EDTA-CN-NS) for the selective determination of ultratrace amounts of lead(II). [132] The detection limit of the EDTA-CN-NS/Nafion sensor reached 5.7 10 À13 mol L À1 with two linear ranges from 2.1 10 À12 -1.3 10 À9 and 1.3 10 À9 -1.7 10 À6 mol L À1 .T he sensorb ehaved with acceptable immunity from commoni nterference in the determination of lead(II) and was employed to analyze lead(II) concentrationsi nd ifferent water samples. The g-C 3 N 4 nanosheets loaded with metal showed excellent electrochemical performances.M etal/g-C 3 N 4 nanocomposites have been used to construct an ew type of electrochemical analysis detection platform, including small molecules, immunoassays, and DNA sensors.…”

Section: Biosensorsmentioning

confidence: 94%

Metal/Graphitic Carbon Nitride Composites: Synthesis, Structures, and Applications

Wang

et al. 2016

Chemistry An Asian Journal

Self Cite

113

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Graphitic carbon nitride (g-C N ) has been widely used in fields related to energy and materials science. However, nanostructured g-C N photocatalysts synthesized by traditional thermal polycondensation methods have the disadvantage of small specific surface areas and wide band gaps; these limit the catalytic activity and application range of g-C N . Based on the unique nanostructure of g-C N , it is a feasible method to modify g-C N with metals to design novel metal-semiconductor composites. Metals alter the photochemical properties of g-C N , in particular, narrow the band gap and expand photoabsorption into the visible range, which improves the photocatalytic performance. This review covers recent progress in metal/g-C N nanocomposites for photocatalysts, organic systems, biosensors, and so on. The aim is to summarize the synthetic methods, nanostructures, and applications of metal/g-C N nanocomposite materials, as well as discuss future research directions in these areas.

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Voltammetric Sensor Modified by EDTA-immobilized Graphene-like Carbon Nitride Nanosheets: Preparation, Characterization and Selective Determination of Ultra-Trace Pb (II) in Water Samples

Cited by 39 publications

References 59 publications

Voltammetric determination of metal ions beyond mercury electrodes. A review

Voltammetric determination of metal ions beyond mercury electrodes. A review

High Performance Zinc Oxide Nanorod-Doped Ion Imprinted Polypyrrole for the Selective Electrosensing of Mercury II Ions

Metal/Graphitic Carbon Nitride Composites: Synthesis, Structures, and Applications

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