Experimental design on determination of Sn(II) by the modified carbon paste electrode with Fe(II)-exchanged clinoptilolite nanoparticles

Pourshirband, Nafiseh; Nezamzadeh‐Ejhieh, Alireza

doi:10.1016/j.solidstatesciences.2019.106082

Cited by 20 publications

(5 citation statements)

References 54 publications

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“…Figure A shows a typical plot of the CV peak current versus the scan rate, showing a proportional relationship to line equations of I pa : 192.698 + 0.809ν ( r 2 = 0.9278) and I pc : – 403.6337–3.6255ν ( r 2 = 0.9608) for the anodic and cathodic branches, respectively. This i –ν proportional relationship proves a surface-confined behavior for the electrode response in the electrooxidation of NiO. ,− According to eq , high amounts of hydroxyl anions must be present at the electrode surface for NiO electrooxidation. Thus, the diffusion of these anions toward the electrode surface is essential.…”

Section: Resultsmentioning

confidence: 73%

“…By comparing these CVs with their corresponding CVs in the absence of TAM, the decreased peak current, or the difference between peak currents in the presence and absence of TAM (Δ i ), was calculated and plotted against the square root of the scan rate. A proportional relationship is presented for the anodic reaction (Figure B, line equations: Δ I p : −95.7913 + 115.8654ν 1/2 , r 2 = 0.9939), and thus, this decreased peak current confirms the diffusion-controlled process. ,− The increased current associated with the NiO electrooxidation needs the diffusion of the TAM species to the electrode surface.…”

Section: Resultsmentioning

confidence: 85%

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Cyclic and Linear Sweep Voltammetric Studies of a Modified Carbon Paste Electrode with Nickel Oxide Nanoparticles toward Tamoxifen: Effects of Surface Modification on Electrode Response Kinetics

2022

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Due to the serious adverse futures of some anticancer drugs, the determination of trace amounts of these drugs by simple analytical techniques is of great interest. In this regard, knowing about the mechanism of the analyte with the sensing material plays an important role. Nickel oxide nanoparticles (NiO NPs) modified by a carbon paste electrode (NiO-CPE) showed an irreversible cyclic voltammetric (CV) behavior in the NaOH (pH 13) supporting electrolyte based on the peak separation of 311 mV. Its peak current was decreased by adding tamoxifen (TAM), confirming that TAM molecules can consume NiO before participating in the electrode reaction. For this goal, TAM can be oxidized or reduced, and the corresponding mechanisms are schematically illustrated in the text. This study focused on the kinetic aspects of the process. Based on the CV results, a surface coverage (Γ) value of 2.72 × 10 –5 mol NiO per cm 2 was obtained with charge transfer coefficients α a and α c of 0.317 and 0.563, respectively. α a and α c values were changed to 0.08 and 0.72 in the presence of TAM. Further, the rate constant ( k s ) value was 0.021 ± 0.01 s –1 in the presence of TAM. In linear sweep voltammetry (LSV), an α value of about 0.636 ± 0.023 and an exchange rate constant ( k o ) value of about 0.097 ± 0.031 s –1 were obtained in the absence of TAM, which changed to 0.62 ± 0.081 and 0.089 ± 0.021 s –1 in the presence of TAM, respectively. Despite more published papers, when the TAM analyte was added to the NaOH supporting electrolyte, both anodic and cathodic peak currents of the modified NiO-CPE decreased. We suggested some reasons for this decreased peak current, and four mechanisms were illustrated for the electrode response in the presence of TAM.

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Section: Resultsmentioning

confidence: 73%

Section: Resultsmentioning

confidence: 85%

Cyclic and Linear Sweep Voltammetric Studies of a Modified Carbon Paste Electrode with Nickel Oxide Nanoparticles toward Tamoxifen: Effects of Surface Modification on Electrode Response Kinetics

2022

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“…In addition, clinoptilolite (a naturally occurring zeolite containing Si and Al) NPs were ion exchanged in a Fe(II) solution, and the modified CPE obtained was used in the determination of Sn 2+ . 199 Several research groups have also reported on the synthesis of magnetic NMs (mainly NPs as part of nanocomposites) and their use as electrode modifiers. 26,30,96,100,132,137,182,188,200 Fig.…”

Section: Nanomaterials As Electrode Modifiersmentioning

confidence: 99%

Recent advances in the modification of electrodes for trace metal analysis: a review

Xhanari,

Finšgar

2023

Analyst

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“…However, there is a growing interest in finding a reliable, simple, rapid, and efficient method for FA analysis. Electrochemical methods have gained considerable attention in recent times due to their high selectivity, sensitivity, cost‐effectiveness, and convenience 10,11 . Electrochemical methods utilize mediators to facilitate communication between the target molecule and the electrode surface 12–14 .…”

Section: Introductionmentioning

confidence: 99%

Folic acid electrocatalytic oxidation on the carbon electrode surface modified with ferrocenyl grafted polymethylhydrosiloxane

Rahimpour

Zarenezhad

Teimuri‐Mofrad

2023

Applied Organom Chemis

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In this research, we synthesized ferrocenyl‐grafted polymethylhydrosiloxane (PMHS) through a hydrosilylation reaction between 3‐butenylferrocene and PMHS. The incorporation of the ferrocenyl derivative into the polymer backbone imparted electrochemical properties to the modified polymer. The modification of the polymer was confirmed by various techniques, including FT‐IR, 1H NMR, and UV–Vis spectroscopy. To prepare the new ferrocenyl polymer, we utilized cross‐linking agents, namely terephthaldehyde (TPA) and fresh egg white (FEW). The resulting polymer was drop‐coated onto a glassy carbon electrode (GCE) surface (5 μL). Electrochemical impedance spectroscopy (EIS) analysis confirmed the successful immobilization of the polymer on the GCE surface. Under physiological pH conditions (pH = 7), the Fc/Fc + couple facilitated the oxidation of folic acid (FA) at a potential of 0.40 V vs. the Ag/AgCl reference electrode. The GC/PMHS‐Fc/(TPA + FEW) electrode exhibited excellent stability, retaining 89% and 90% of its electrocatalytic activity after 500 cycles and 30 days of storage in a refrigerator, respectively. Thus, it shows promising potential for the determination of FA in biological fluids. The ferrocene‐modified electroactive polymer demonstrated satisfactory linear ranges for FA determination (5–150 μM) and a low limit of detection (LOD = 36 nM). These results highlight the effectiveness of the new polymer in detecting FA in biological samples.

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Experimental design on determination of Sn(II) by the modified carbon paste electrode with Fe(II)-exchanged clinoptilolite nanoparticles

Cited by 20 publications

References 54 publications

Cyclic and Linear Sweep Voltammetric Studies of a Modified Carbon Paste Electrode with Nickel Oxide Nanoparticles toward Tamoxifen: Effects of Surface Modification on Electrode Response Kinetics

Cyclic and Linear Sweep Voltammetric Studies of a Modified Carbon Paste Electrode with Nickel Oxide Nanoparticles toward Tamoxifen: Effects of Surface Modification on Electrode Response Kinetics

Recent advances in the modification of electrodes for trace metal analysis: a review

Folic acid electrocatalytic oxidation on the carbon electrode surface modified with ferrocenyl grafted polymethylhydrosiloxane

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