Molecularly Imprinted Polypyrrole on Glassy Carbon Electrode Modified with Reduced Graphene Oxide and Gold Nanoparticles for Isoamyl Alcohol Analysis in Fusel Oil

Mariano, Thiago M.; Beluomini, Maísa Azevedo; Stradiotto, Nelson Ramos

doi:10.21577/0103-5053.20200174

Cited by 4 publications

(4 citation statements)

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“…Q represents the constant phase element (CPE), which is identified as pure capacitor and is related to the double layer capacitance, and the second R represent the charge‐transfer resistance, R ct , and W the Warburg impedance. The capacitance arc in the high frequency region and a Warburg impedance line in the low frequency was observed for GCE and RGO‐GCE, according to previous results reported in the literature [39, 45, 46]. The R ct found for GCE was 687.3 Ω, while for RGO‐GCE it was 203.4 Ω, showing that the electron transfer resistance on the electrode modified with RGO was approximately 3.3 times lower.…”

Section: Resultssupporting

confidence: 86%

Simultaneous determination of benzene, toluene and xylene (BTX) by Au nanoparticles (AuNP) anchored in reduced graphene oxide electrode

Carlos Braga Alves,

Ribamar Nascimento dos Santos,

Pereira Marques

et al. 2023

Electroanalysis

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This work reports the development of an electrochemical sensor for the simultaneous determination of benzene, toluene and xylene (BTX). The sensor was prepared by coating the glassy carbon electrode (GCE) with reduced graphene oxide (RGO) film, decorated with gold nanoparticles (AuNP), by electrodeposition. Surface modification with AuNP/RGO‐GCE favored the electron transfer process and increased the active area, providing greater sensitivity for the sensor. The AuNP/RGO‐GCE sensor was characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and scanning electron microscope (SEM). Quantitative analyses of BTX were carried out using the differential pulse voltammetry (DPV) technique, after optimization of the parameters that influence the sensor performance. The sensor showed a linear response in the 30–240 μM concentration range, with a detection limit range of 1.8–2.2 μM, 2.2–2.7 μM, and 2.0–2.6 μM, and quantification limit range of 6.2–7.3 μM, 7.2–8.9 μM, and 6.6–8.8 μM, respectively for B, T and X. In addition to the satisfactory repeatability and stability, in the determination of BTX, the method still showed good selectivity even in the presence of molecules with similar chemical structure, such as: catechol, p‐benzoquinone, resorcinol, ethanol, pyrene and in the presence of K+, Mg2+ and Pb2+ ions. The device was successfully applied for the determination of the analytes (BTX) in water samples from fuel station separator boxes, where recovery rates close to 100 % (97.8 % to 103.1 %) were obtained. The results obtained suggest that the AuNP/RGO‐GCE sensor has strong potential for detecting BTX in wastewater discharge from industrial processes.

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Section: Resultssupporting

confidence: 86%

Simultaneous determination of benzene, toluene and xylene (BTX) by Au nanoparticles (AuNP) anchored in reduced graphene oxide electrode

Carlos Braga Alves,

Ribamar Nascimento dos Santos,

Pereira Marques

et al. 2023

Electroanalysis

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“…In contrast, electrochemical sensors are a suitable alternative, as they yield high sensitivity with low detection limits, simple sample preparation, and shorter analysis time. 13 The essential component for the development of electrochemical sensors is the electrode. A glassy carbon electrode (GCE) is widely used to develop an electrochemical sensor, as it provides a wide electrochemical potential window.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast, electrochemical sensors are a suitable alternative, as they yield high sensitivity with low detection limits, simple sample preparation, and shorter analysis time. 13 …”

Section: Introductionmentioning

confidence: 99%

Optimization of uric acid detection with Au nanorod-decorated graphene oxide (GO/AuNR) using response surface methodology

et al. 2022

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“…S. Roy et al fabricated an electrode for sensing L-tyrosine amino acid based on a molecularly imprinted electrochemical sensor [25]. In another study, a reduced graphene oxide and gold nanoparticles modified electrode based on a molecularly imprinted polypyrrole electrode is prepared for electrochemical detection of isoamyl alcohol in fusel oil [26]. Also, in a study a novel molecular imprinted QCM sensor based on MoS2NPs-MWCNT nanocomposite for the determination of zearalenone [27].…”

Section: Introductionmentioning

confidence: 99%

Ti₃C₂T_xMXene modified indium tin oxide (ITO) electrode for electrochemical sensing of bilirubin based on a molecularly imprinted pyrrole polymer

Manoj,

Ghrera

2024

Phys. Scr.

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In this study, electrochemical sensing of bilirubin (BR) is performed on the Ti3C2TxMXene-modified ITO electrode based on a molecularly imprinted pyrrole polymer. Firstly, Ti3C2TxMXene is synthesised by chemical etching and deposited at the ITO electrode surface by drop casting. After that, pyrrole as a monomer is electropolymerized in the presence of a sodium acetate buffer solution containing the BR template to prepare a BR-imprinted electrode. Field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), and UV-Visible absorption spectroscopy confirms the MXene synthesis. The molecular imprinted polymer (MIP) formation at the electrode is confirmed by electrochemical methods such as differential pulse voltammetry (DPV), electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV). The linearity range, limit of detection and limit of quantification are calculated as 10µM to 90µM, 0.197µM and 0.598µM respectively. Selectivity, stability and reproducibility are also reported for the prepared MIP sensor.

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Molecularly Imprinted Polypyrrole on Glassy Carbon Electrode Modified with Reduced Graphene Oxide and Gold Nanoparticles for Isoamyl Alcohol Analysis in Fusel Oil

Cited by 4 publications

References 0 publications

Simultaneous determination of benzene, toluene and xylene (BTX) by Au nanoparticles (AuNP) anchored in reduced graphene oxide electrode

Simultaneous determination of benzene, toluene and xylene (BTX) by Au nanoparticles (AuNP) anchored in reduced graphene oxide electrode

Optimization of uric acid detection with Au nanorod-decorated graphene oxide (GO/AuNR) using response surface methodology

Ti₃C₂T_xMXene modified indium tin oxide (ITO) electrode for electrochemical sensing of bilirubin based on a molecularly imprinted pyrrole polymer

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Molecularly Imprinted Polypyrrole on Glassy Carbon Electrode Modified with Reduced Graphene Oxide and Gold Nanoparticles for Isoamyl Alcohol Analysis in Fusel Oil

Cited by 4 publications

References 0 publications

Simultaneous determination of benzene, toluene and xylene (BTX) by Au nanoparticles (AuNP) anchored in reduced graphene oxide electrode

Simultaneous determination of benzene, toluene and xylene (BTX) by Au nanoparticles (AuNP) anchored in reduced graphene oxide electrode

Optimization of uric acid detection with Au nanorod-decorated graphene oxide (GO/AuNR) using response surface methodology

Ti3C2TxMXene modified indium tin oxide (ITO) electrode for electrochemical sensing of bilirubin based on a molecularly imprinted pyrrole polymer

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Product

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Ti₃C₂T_xMXene modified indium tin oxide (ITO) electrode for electrochemical sensing of bilirubin based on a molecularly imprinted pyrrole polymer