Tetrabutylammonium-modified clay film electrodes: Characterization and application to the detection of metal ions

Maghear, Adela; Tertiş, Mihaela; Fritea, Luminița; Marian, I.; Indrea, Emil; Walcarius, Alain; Săndulescu, Robert

doi:10.1016/j.talanta.2014.02.042

Cited by 25 publications

(15 citation statements)

References 41 publications

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“…Nyquist plot depicts the imaginary part versus the real part of the impedance, which is indicative of the capacitive and inductive character of the system under investigation, and each point in the Nyquist plot corresponds to impedance at one frequency [163]. Qualitatively, a Nyquist plot includes a semicircle and a linear zone, which correspond to the electron transfer-limited process and the diffusion-limited process, respectively [164]. Nyquist plots have the advantage that activation-controlled processes with distinct time constants show up as unique impedance arcs and the shape of the curve provides insight into possible mechanism or governing phenomena.…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

“…A typical example dealing with the use of EIS for the characterization of electron transfer properties at a glassy carbon electrode modified by an organoclay is represented on Fig. 2 [164].…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

“…The modified electrode which showed great affinity towards Pb(II) ions was applied to the sensitive detection of the same pollutant by means of ASDPV. Maghear et al [164] also described the application of a GCE modified by spin coating of smectite clay partially exchanged with tetrabutylammonium ions (TBA) to the preconcentration electroanalysis of several metal ions (Cd, Pb and Cu). The intercalation of TBA between the clay mineral sheets, although partial, induced the expansion of the interlayer spacing (as ascertained by XRD) resulting in the enhancement of mass transport rates (as pointed out by electrochemical monitoring of permeability properties of these thin (organo)clay films on GCE).…”

Section: Current [Mp] / μMmentioning

confidence: 99%

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Organoclay-modified electrodes: preparation, characterization and recent electroanalytical applications

Tonlé

Ngameni

Tchieno

et al. 2015

J Solid State Electrochem

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Amperometric sensors dedicated to the determination of pollutants and other compounds of interest face daily a great challenge: the development of sensitive, reproducible and low-cost devices allowing fast analyses. This review deals with the beneficial role and application of organoclays exploited as sensing materials in various fields of electroanalysis, for the past 15 years (period 2000-2014). After a description of different preparation methods leading to clay minerals chemically modified by organic compounds, the common methods used for their characterization are exposed; then, their application as electrode modifiers is described, covering several approaches that were developed to enhance either the sensitivity or the selectivity of the indexed organoclay-based sensors. Finally, a brief description of voltammetric methods frequently used for electroanalytical purposes is given, followed by an update of recent and salient results achieved for the detection of inorganic and organic electroactive compounds or ions.

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Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Section: Current [Mp] / μMmentioning

confidence: 99%

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Organoclay-modified electrodes: preparation, characterization and recent electroanalytical applications

Tonlé

Ngameni

Tchieno

et al. 2015

J Solid State Electrochem

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“…Clay minerals are also known as "designer catalysts" and exhibit numerous sustainable and eco-friendly electrochemical applications [9]. Naturally occurring bentonite (Bt) is a 2 : 1 clay and possesses layered hydrous aluminosilicate structure, consisting of bonded silicates (Si 2 O 5 ) and aluminium hydroxide [Al 2 (OH) 4 ] layers [10]. Bt can be used as effective catalysts owing to the large surface area, enhanced cation exchange capacity, and high chemical and thermal stability [6,11].…”

Section: Introductionmentioning

confidence: 99%

In situ Electrochemical Synthesis of a Composite Film Containing Nickel Hexacyanoferrate and Bentonite Clay for the Sensitive Determination of Acetaminophen and Dopamine

et al. 2019

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A composite film of nickel hexacyanoferrate (NiHCF) and bentonite (Bt) clay (abbreviated as NiHCF−Bt) is synthesized by an in situ electrochemical method. For this synthesis, nickel ions are immobilized on Bt clay by an ion‐exchange process, equilibrating Bt clay with nickel nitrate. On a glassy carbon electrode (GCE), the nickel ion‐exchanged Bt clay (Ni2+−Bt) is coated to get the modified electrode which is represented as GCE/Ni2+−Bt. The NiHCF−Bt composite film is prepared on the GCE surface using the GCE/Ni2+−Bt and scanning the electrode potentials between −0.10 to 1.00 V continuously in an aqueous solution containing potassium hexacyanoferrate and potassium chloride. This NiHCF−Bt modified GCE (GCE/NiHCF−Bt) exhibits redox peaks due to the oxidation and reduction of the central metal ion, Fe2+. The electro‐generated Fe3+ present in the GCE/NiHCF−Bt, electrocatalytically oxidizes a range of drugs like acetaminophen (AC), dopamine (DA), and tyrosine (TY) at decreased overpotentials with high current. This property is advantageously used for the precise quantification of AC, DA, and TY. Sensitivity, limit of detection, and linear calibration range for the determination of AC are found to be 0.20 μA μM−1 cm−2, 1.5 μM, and 25.0–1000.0 μM, respectively. Further, the amount of AC present in pharmaceutical products is satisfactorily quantified which demonstrated the use of the NiHCF−Bt composite film in electroanalysis.

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“…Indeed, they display significant improvements compared to conventional electrodes [14,15]. The use of clay to modify carbon paste electrodes (CCPEs) is a current research area in electroanalysis [16]. In recent reviews, Walcarius et al have demonstrated a high sensitivity of this type of electrodes attributed to a better preconcentration efficiency, a high accessibility to binding sites and faster diffusion processes [17,18].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical determination of paraquat in potato, lemon, orange and natural water samples using sensitive-rich clay carbon electrode

Kasmi¹,

Lahrich

Farahi

et al. 2016

Journal of the Taiwan Institute of Chemical Engineers

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Tetrabutylammonium-modified clay film electrodes: Characterization and application to the detection of metal ions

Cited by 25 publications

References 41 publications

Organoclay-modified electrodes: preparation, characterization and recent electroanalytical applications

Organoclay-modified electrodes: preparation, characterization and recent electroanalytical applications

In situ Electrochemical Synthesis of a Composite Film Containing Nickel Hexacyanoferrate and Bentonite Clay for the Sensitive Determination of Acetaminophen and Dopamine

Electrochemical determination of paraquat in potato, lemon, orange and natural water samples using sensitive-rich clay carbon electrode

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