Construction of Modified Carbon Paste Electrode for Highly Sensitive Simultaneous Electrochemical Determination of Trace Amounts of Copper (II) and Cadmium (II)

Afkhami, Abbas; Soltani‐Shahrivar, Morteza; Ghaedi, Hamed; Madrakian, Tayyebeh

doi:10.1002/elan.201500308

Cited by 34 publications

(15 citation statements)

References 43 publications

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“…The CMCPEs consist of the modification of the surface of CPE by various materials such as metals nanoparticles (MNPs), CNMs, and CPs [22][23][24]. The combination of these materials was also applied to combine their fantastic proprieties.…”

mentioning

confidence: 99%

Electrochemical determination of traces lead ions using a new nanocomposite of polypyrrole/carbon nanofibers

Oularbi

Turmine

Rhazi³

2017

J Solid State Electrochem

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In this paper, a new nanocomposite of polypyrrole (PPy) and carbon nanofibers (CNFs) modified carbon paste electrode (CPE) has been reported for the determination of traces lead ions (Pb 2+ ). The obtained nanocomposite was fabricated by combining the unique advantages of PPy and CNFs using a very simple approach, which consists on modifying the CPE by the functionalized CNFs and then by the PPy film using galvanostatic mode. Several techniques were used to investigate the functionalized CNFs and the PPy/CNFs nanocomposite including Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) for surface layers of CNFs, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) for the electrical proprieties of the PPy/CNFs nanocomposite. The surface morphologies were examined by field emission gun scanning electron microscopy (FEG-SEM). The square wave anodic striping voltammetry (SWASV) was used to investigate the analytical performances of the designed electrode PPy/CNFs/CPE. Different parameters that affect the stripping analysis of Pb 2+ including supporting electrolyte, deposition potential, and deposition time were investigated. Under the optimum experimental conditions, a good linearity between the stripping peak currents and the concentration of Pb 2+ was obtained in the range of concentration from 0.2 to 130 µg L -1 Pb 2+ . The detection limit was estimated to be 0.05 µg L -1 Pb 2+ . Finally, the proposed method has been successfully applied for the determination of Pb 2+ in real samples of tap water with satisfactory results.

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confidence: 99%

Electrochemical determination of traces lead ions using a new nanocomposite of polypyrrole/carbon nanofibers

Oularbi

Turmine

Rhazi³

2017

J Solid State Electrochem

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“…Glassy carbon electrode (a class of good conductivity electrode material) provide the most effective electrochemically insert to higher resistibility towards environment complications and aggressive chemical agent during electrochemical methods . For extend and/or enhance application in electrochemical detection systems, researches are bound up with the modified glassy carbon electrode (GCE) has notably augmented . Among these modification methods, their applicability is an important strategy in construction of modification of the GCE with vast variety of nano‐materials such as CNTS , Au NPs , Pt NPs , Cu NPs , TiO 2 ‐graphene nano‐composite and L‐cysteine/AuNPs/Bi 2 O 3 modified GCE .…”

Section: Introductionmentioning

confidence: 57%

Organic‐inorganic‐hybrid‐enhancement Electrochemical Sensor for Determination of Cu (II) in River Water

Chen

Wang

et al. 2018

Electroanalysis

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A dual strategy that the L‐cysteine self‐assembling on three‐dimensional network of organic‐hybrid‐materials realized by successive interaction of Au−S bond is employed to construct as the amplified electrochemical sensor for determination Cu (II). Specifically, the sensor combined a rigid three‐dimension inorganic net which provides a higher interfacial area as well as faster adsorption of ions. Accordingly, surface and interfacial‐dominated electro‐catalysis reactivity is used as an ideal test‐bed to verify the reliability of electrochemical sensor that reveal enhancement sensitiveness and selectivity, low detection limit, and stability over a long period of time. Time‐dependent density functional theory (TD‐DFT) were used to calculating the all complexes energies at the B3LYP/LANL2DZ level associated with the polarized continuum model (PCM). The result of calculation indicates that the binding strength of Cu (II), Cd (II), As (III), Hg (II) with L‐cysteine are decrease successively, and this is in well agreement with experimental results. This work not only achieves an unprecedented understanding to L‐cysteine/Au/TiO2/GCE sensor but also provides a new perspective for application in detection of Cu (II) in real river waters.

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“…The linear relationship became worse in higher concentration range, which could be attributed to the saturation effect. The limit of detection (LOD) was calculated according to the following equation: LOD = 3S b /S; S b was the standard deviation of blank signal, and S was the sensitivity [10]. S b was obtained by 10 replicate determinations of blank sample.…”

Section: Analytical Performance Of L-cysteine/aunps-rgo/gcementioning

confidence: 99%

“…However, these methods need expensive instrument and complicated operation. In comparison of these methods, electrochemical method shows particular advantages for Cu 2 + determination, such as inherent simplicity, rapid response, and low cost [9][10].…”

Section: Introductionmentioning

confidence: 99%

A Self‐assembled L‐Cysteine and Electrodeposited Gold Nanoparticles‐reduced Graphene Oxide Modified Electrode for Adsorptive Stripping Determination of Copper

Zhang

Huang

et al. 2017

Electroanalysis

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Glassy carbon electrode (GCE) modified with L-cysteine and gold nanoparticles-reduced graphene oxide (AuNPs-RGO) composite was fabricated as a novel electrochemical sensor for the determination of Cu 2 + . The AuNPs-RGO composite was formed on GCE surface by electrodeposition. The L-cysteine was decorated on AuNPs by self-assembly. Physicochemical and electrochemical properties of L-cysteine/AuNPs-RGO/GCE were characterized by scanning electron microscopy, atomic force microscopy, energy dispersive spectroscopy, Raman spectroscopy, X-ray diffraction, cyclic voltammetry and adsorptive stripping voltammetry. The results validated that the prepared electrode had many attractive features, such as large electroactive area, good electrical conductivity and high sensitivity. Experimental conditions, including electrodeposition cycle, self-assembly time, electrolyte pH and preconcentration time were studied and optimized. Stripping signals obtained from L-cysteine/ AuNPs-RGO/GCE exhibited good linear relationship with Cu 2 + concentrations in the range from 2 to 60 mg L À1 , with a detection limit of 0.037 mg L À1 . Finally, the prepared electrode was applied for the determination of Cu 2 + in soil samples, and the results were in agreement with those obtained by inductively coupled plasma mass spectrometry.

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Construction of Modified Carbon Paste Electrode for Highly Sensitive Simultaneous Electrochemical Determination of Trace Amounts of Copper (II) and Cadmium (II)

Cited by 34 publications

References 43 publications

Electrochemical determination of traces lead ions using a new nanocomposite of polypyrrole/carbon nanofibers

Electrochemical determination of traces lead ions using a new nanocomposite of polypyrrole/carbon nanofibers

Organic‐inorganic‐hybrid‐enhancement Electrochemical Sensor for Determination of Cu (II) in River Water

A Self‐assembled L‐Cysteine and Electrodeposited Gold Nanoparticles‐reduced Graphene Oxide Modified Electrode for Adsorptive Stripping Determination of Copper

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