A voltammetric sensor based on glassy carbon electrode modified with 1H-1,2,4-triazole-3-thiol coating for rapid determination of trace lead ions in acetate buffer solution

Danyıldız, Zafer; Uzun, Demet; Calam, Tuğba Tabanlıgil; Hasdemır, Erdoğan

doi:10.1016/j.jelechem.2017.09.042

Cited by 23 publications

(13 citation statements)

References 43 publications

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“…The performance of our developed electrode compared with several reported sensors in the determination of Pb(II), are given in Table . It can be seen that the PtNFs/GCE offered a wider linear range than the one in many previous reports . The limit of detection (LOD) of this our electrode is comparable and even better than that of some sensors reported in Table .…”

Section: Resultssupporting

confidence: 50%

“…The limit of detection (LOD) of this our electrode is comparable and even better than that of some sensors reported in Table . The lower LOD in other literature can be ascribed to the longer accumulation period (300 s) and more negative accumulation potential (−1.4 V) or to the larger surface of platform electrode (GCE: 5 mm) as well as longer accumulation period (180 s) . However, when using the prepared electrode, the detection limits of Pb(II) were far below the acceptable limit (10 μg L −1 ) by the World Health Organization .…”

Section: Resultsmentioning

confidence: 84%

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Fabrication of Nano Flower‐shaped Platinum on Glassy Carbon Electrode as a Sensitive Sensor for Lead Electrochemical Analysis

Nguyen

Cao²,

Pham

et al. 2019

Electroanalysis

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Platinum nanoflowers modified glassy carbon electrodes (PtNFs/GCE) was fabricated simply for lead determination in water samples. The modified electrodes were prepared by electrodeposition in hexachloroplatinic acid solution at constant potential. The influence of deposition time and potential on surface morphology, chemical composition, electrochemical properties of electrode were investigated. At À 0.2 V of potential and 150 s of deposition duration, platinum developed as nanoflower shape and scattered densely all over the glassy carbon surface, producing the largest electrochemically active surface areas. The highest differential pulse stripping voltammetry (DPSV) signal of lead was obtained by using the prepared electrode. Under optimized experimental condition of electrolyte, accumulation potential and time, the peak current was found to be linear proportion to lead concentration in range of 1 to 100 μg L À 1 (slope = 0.371) with a limit of detection of 0.398 μg L À 1 . The method has good repeatability and reproducibility with relative standard deviations of 1.47 % and 4.83 %, respectively. The modified PtNFs/GCE also demonstrated an excellent long-term stability with only 9 % decrease in Pb peak current over 30 days. Moreover, the performance of the modified PtNFs/GCE in determination of Pb(II) in two industrial wastewaters was good agreement with data obtained by a graphite furnace atomic absorption spectrometry (GFAAS) method.

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Section: Resultssupporting

confidence: 50%

Section: Resultsmentioning

confidence: 84%

Fabrication of Nano Flower‐shaped Platinum on Glassy Carbon Electrode as a Sensitive Sensor for Lead Electrochemical Analysis

Nguyen

Cao²,

Pham

et al. 2019

Electroanalysis

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“…1B). This is also supported by C1s signals showing notably a line at 288.8 eV (corresponding to N-C=N centers in the triazole ring 75,76 ) which remained intact after solvent extraction for the 5 mM sample, whereas the lines characteristic of the CTAB template (C-C at 284.5 eV and C-N at 286.0 eV) dramatically decreased upon solvent extraction of the films prepared from lower Fe(Htrz)3 concentrations (see Fig. S5 in Supporting Information), but such data have to be taken with great care because of the existence of carbon-containing contamination and residual ethoxy groups resulting in C1s peaks at similar binding energies.…”

Section: Mesopores Composition and Effect Of Solvent Extraction On Template Removalmentioning

confidence: 55%

Coordination Polymers as Template for Mesoporous Silica Films: A Novel Composite Material Fe(Htrz)₃@SiO₂with Remarkable Electrochemical Properties

et al. 2019

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While attempting to confine Fe(Htrz)3 (Htrz = 1,2,4,-1H-triazole) into a mesoporous silica matrix during its formation by electrochemically assisted self-assembly (EASA), we have discovered that such spin crossover complex is likely to act as the template (in place of the surfactant species) to form in one step a composite mesoporous material (Fe(Htrz)3@SiO2). The EASA method usually leads to the vertical growth of mesoporous silica thin films owing to the electro-induced condensation of silica precursors (i.e., tetraethoxysilane, TEOS) around tubular micelles (i.e., made of cetyltrimethylammonium bromide, CTAB) oriented orthogonally to the underlying support. In the presence of Fe(Htrz)3 in the starting sol (in addition to TEOS and CTAB), two distinct situations can be reached. At low Fe(Htrz)3 concentration (≤ 3 mM), the vertically aligned mesostructure is formed and Fe(Htrz)3 complexes are incorporated along with the surfactant phase, but most of them are released upon surfactant removal. At high Fe(Htrz)3 concentration (typically 5 mM), a wormlike mesoporous film is obtained in which Fe(Htrz)3 species act as a real template for the formation of a mesoporous Fe(Htrz)3@SiO2 film. Interestingly, the iron-triazole 2 complex is strongly entrapped in the silica matrix as it cannot be removed by solvent extraction (contrary to CTAB), as evidenced from X-ray photoelectron spectroscopy (XPS). Even more attractive are the electrochemical properties of the composite Fe(Htrz)3@SiO2 material, exhibiting highly stable operational stability (i.e., identical voltammetric signals upon multiple successive measurements), contrary to Fe(Htrz)3 species incorporated by impregnation of the surfactant phase which are found to leach out in solution upon use. Such in situ elaborated mesoporous composite made of Fe(Htrz)3 template strongly immobilized in a silica host is thus promising for bridging the gap between soft and hard functional organic-inorganic materials, which is briefly illustrated here for the mediated detection of hydrogen peroxide thanks to the electrocatalytic properties of the Fe(Htrz)3 complex, which are maintained even when immobilized in the composite Fe(Htrz)3@SiO2 film.

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“…The supporting electrolyte solution and its pH value are effective and significant on the oxidation peak current of VAN . The influences of supporting electrolyte and its pH value were examined on the anodic peak current of VAN on the ATT‐Au electrode surface by the DPV method (Figure A).…”

Section: Resultsmentioning

confidence: 99%

Rapid and Selective Determination of Vanillin in the Presence of Caffeine, its Electrochemical Behavior on an Au Electrode Electropolymerized with 3‐Amino‐1,2,4‐triazole‐5‐thiol

Calam

Uzun

2019

Electroanalysis

Self Cite

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Electrochemical oxidation of vanillin (VAN) in the presence of caffeine (CAF) was studied on a gold (Au) electrode modified with 3‐amino‐1,2,4‐triazole‐5‐thiol (ATT) film by using differential pulse voltammetry (DPV) and cyclic voltammetry (CV) method. The formation of the ATT film on the Au electrode surface was characterized by the CV, fourier transform infrared spectroscopy (FTIR) and impedance spectroscopy (EIS) methods. A single irreversible oxidation peak of the VAN was obtained by using the CV method. The determination of VAN in the presence of CAF was carried out at pH 4 in Britton Robinson buffer (BR) by the DPV method. Under the optimal conditions, the oxidation peak current was proportional to the concentration of VAN in the range of 1.1 μM to 76.4 μM in the presence of CAF with the correlation coefficient of 0.997 and the detection limit of 0.19 μM (S/N=3). The selective determination of VAN in a commercial coffee sample was carried out with satisfactory results on the ATT‐Au modified electrode.

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A voltammetric sensor based on glassy carbon electrode modified with 1H-1,2,4-triazole-3-thiol coating for rapid determination of trace lead ions in acetate buffer solution

Cited by 23 publications

References 43 publications

Fabrication of Nano Flower‐shaped Platinum on Glassy Carbon Electrode as a Sensitive Sensor for Lead Electrochemical Analysis

Fabrication of Nano Flower‐shaped Platinum on Glassy Carbon Electrode as a Sensitive Sensor for Lead Electrochemical Analysis

Coordination Polymers as Template for Mesoporous Silica Films: A Novel Composite Material Fe(Htrz)₃@SiO₂with Remarkable Electrochemical Properties

Rapid and Selective Determination of Vanillin in the Presence of Caffeine, its Electrochemical Behavior on an Au Electrode Electropolymerized with 3‐Amino‐1,2,4‐triazole‐5‐thiol

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A voltammetric sensor based on glassy carbon electrode modified with 1H-1,2,4-triazole-3-thiol coating for rapid determination of trace lead ions in acetate buffer solution

Cited by 23 publications

References 43 publications

Fabrication of Nano Flower‐shaped Platinum on Glassy Carbon Electrode as a Sensitive Sensor for Lead Electrochemical Analysis

Fabrication of Nano Flower‐shaped Platinum on Glassy Carbon Electrode as a Sensitive Sensor for Lead Electrochemical Analysis

Coordination Polymers as Template for Mesoporous Silica Films: A Novel Composite Material Fe(Htrz)3@SiO2with Remarkable Electrochemical Properties

Rapid and Selective Determination of Vanillin in the Presence of Caffeine, its Electrochemical Behavior on an Au Electrode Electropolymerized with 3‐Amino‐1,2,4‐triazole‐5‐thiol

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Coordination Polymers as Template for Mesoporous Silica Films: A Novel Composite Material Fe(Htrz)₃@SiO₂with Remarkable Electrochemical Properties