Development of a novel cyano group containing electrochemically deposited polymer film for ultrasensitive simultaneous detection of trace level cadmium and lead

Philips, M. Francklin; Gopalan, A.; Lee, Yi–Chia

doi:10.1016/j.jhazmat.2012.07.069

Cited by 73 publications

(32 citation statements)

References 62 publications

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“…The most intensive stripping peak was gained at a deposition potential of −0.5 V, as has been shown in Figure S1 (Supporting Information). The weaker intensity of stripping signal at more negative potentials can be ascribed to the less conductivity of polyaniline along with the interruption of accumulation process by hydrogen evolution . The smaller stripping signal at more positive potentials may be due to the less reduction of copper ions and oxidation and eventually degradation of polyaniline .…”

Section: Resultssupporting

confidence: 79%

Electrochemically Generated Recognition Sites in Self‐doped Polyaniline Modified Electrodes for Voltammetric and Potentiometric Determination of Copper(II) Ion

Mohammadabadi

Zanganeh

2017

Electroanalysis

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Chemical recognition elements for copper(II) ion have been generated in electrodes modified with poly(aniline‐co‐metanilic acid), P(An‐co‐MA), membrane and the resulting electrodes were used as selective sensors for voltammetric and potentiometric determination of this ion in an extended pH range. The P(An‐co‐MA) membrane was electrodeposited from aqueous mixed monomer solutions of An and MA, without the presence of a supporting electrolyte. For generating the recognition elements, P(An‐co‐MA) modified electrodes were subjected to several consecutive reduction/oxidation potential steps in copper(II) ion solution. It seems that during these potential steps, the receptor sites of the membrane are adjusted to the size, complexing property and hard/soft nature of copper(II) ion. This electrochemically mediated templating process, provided a selective sensor for determination of copper(II) ion. The results of preconcentration/differential pulse anodic stripping voltammetry, indicated analytical relation between the peak current and concentration of copper(II) from 1.0×10−9 to 1.0×10−4 M. The interference effect of various metal ions was explored and it was found that only mercury and silver ions show a considerable interference. The sensor exhibited selective potentiometric response for copper(II) over a wide concentration range (1.0×10−8 to 1.0×10−3 M) with a Nernstian slope of 27.9±0.3 mV per decade of copper(II) ion activity.

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Section: Resultssupporting

confidence: 79%

Electrochemically Generated Recognition Sites in Self‐doped Polyaniline Modified Electrodes for Voltammetric and Potentiometric Determination of Copper(II) Ion

Mohammadabadi

Zanganeh

2017

Electroanalysis

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“…Obviously, the L-cys/AuNPs/NG electrode exhibited the highest signal response for Pb 2+ ions, which was approximately 39.0 and 1.65 times higher than that of GO/GCE and AuNPs/NG/ GCE. In conclusion, based on the following reasons: (1) the existence of the -CN groups in graphene, because of the doping effect, caused additional chelation with Pb 2+ ions and resulted higher stripping currents [38]. (2) AuNPs increased the effective surface areas and the conductivities of the working electrode.…”

Section: Electrochemical Properties Of Prepared Electrodementioning

confidence: 99%

A sensitive electrochemical sensor for lead based on gold nanoparticles/nitrogen-doped graphene composites functionalized with l-cysteine-modified electrode

Cheng

Yin

et al. 2015

J Solid State Electrochem

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Glassy carbon electrodes (GCEs) modified with Lcysteine (L-cys)/gold nanoparticles (AuNPs)/nitrogen-doped graphene (NG) composite were prepared to fabricate a novel electrochemical sensor for lead. AuNPs were uniformly dispersed into NG and L-cys was successfully decorated on AuNPs through the S-Au bond. The L-cys/AuNPs/NG exhibited a well-distributed nanostructure and high responsivity toward Pb(II). The results indicated that L-cys/AuNPs/NG/ GCE exhibited the highest peak current, reflecting that the Lcys/AuNPs/NG composites showed the best response signal toward Pb 2+ . Under optimized conditions, a linear relationship between the current intensity and Pb 2+ concentration was obtained in a range of 0.5-80 μg L −1 with a detection limit of 0.056 μg L −1 (S/N = 3). The analytical interference procedure and practical application were investigated using the prepared electrode, which exhibited an acceptable result.

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“…The lower DPASV signal at potentials more positive than −0.450 V can be attributed to the less reduction of silver ions and PANI oxidation [56]. DPASV signal decreases when the applied potential becomes more negative than − 0.450 V due to hydrogen evolution or other competing processes [57]. The electroless preconcentration of silver was also carried out by dipping the modified electrode into 1.0 × 10 −5 M silver ion solution for 20 h. The resulting stripping signal (Fig.…”

Section: The Effects Of Preconcentration Conditionsmentioning

confidence: 99%

Electrochemically induced regioregularity of the binding sites of a polyaniline membrane as a powerful approach to produce selective recognition sites for silver ion

Hashemi

Zanganeh

2016

Journal of Electroanalytical Chemistry

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Development of a novel cyano group containing electrochemically deposited polymer film for ultrasensitive simultaneous detection of trace level cadmium and lead

Cited by 73 publications

References 62 publications

Electrochemically Generated Recognition Sites in Self‐doped Polyaniline Modified Electrodes for Voltammetric and Potentiometric Determination of Copper(II) Ion

Electrochemically Generated Recognition Sites in Self‐doped Polyaniline Modified Electrodes for Voltammetric and Potentiometric Determination of Copper(II) Ion

A sensitive electrochemical sensor for lead based on gold nanoparticles/nitrogen-doped graphene composites functionalized with l-cysteine-modified electrode

Electrochemically induced regioregularity of the binding sites of a polyaniline membrane as a powerful approach to produce selective recognition sites for silver ion

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