An amplified electrochemical sensor employing a polymeric film and graphene quantum dots/multiwall carbon nanotubes in a deep eutectic solvent for sensitive analysis of paracetamol and 4-aminophenol

Arab, Nastaran; Fotouhi, Lida; Salis, Andrea; Dorraji, Parisa Seyed

doi:10.1039/d0nj03371e

Cited by 23 publications

(10 citation statements)

References 35 publications

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“…The DES-F-AC/SPE showed the highest electrochemical response because (i) F-AC has a high surface area and sp 2 hybridized carbon atoms constitute the main structure, leading to a much lower electron transfer resistance and high conductivity, and (ii) the presence of DES induced more porosity in F-AC, thus increasing the surface area for target analyte adsorption. Furthermore, the high conductivity of the DES accelerated the electron transfer between the analyte and electrode surface …”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, the high conductivity of the DES accelerated the electron transfer between the analyte and electrode surface. 50 …”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, the high conductivity of the DES accelerated the electron transfer between the analyte and electrode surface. 50 EIS was used to study the interfacial properties of the surface-modified electrodes. A modified Randles circuit was chosen to fit the impedance data.…”

Section: Electrochemicalmentioning

confidence: 99%

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Novel and Highly Sensitive Electrochemical Sensor for the Determination of Oxytetracycline Based on Fluorine-Doped Activated Carbon and Hydrophobic Deep Eutectic Solvents

et al. 2022

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Residues of oxytetracycline (OTC), a veterinary antibiotic and growth promoter, can be present in animal-derived foods; their consumption is harmful to human health and their presence must therefore be detected and regulated. However, the maximum residue limit is low, and consequently highly sensitive and accurate detectors are required to detect the residues. In this study, a novel highly sensitive electrochemical sensor for the detection of OTC was developed using a screen-printed electrode modified with fluorine-doped activated carbon (F-AC/SPE) combined with a novel deep eutectic solvent (DES). The modification of activated carbon by doping with fluorine atoms (F-AC) enhanced the adsorption and electrical activity of the activated carbon. The novel hydrophobic DES was prepared from tetrabutylammonium bromide (TBABr) and a fatty acid (malonic acid) using a green synthesis method. The addition of the DES increased the electrochemical response of F-AC for OTC detection; furthermore, it induced preconcentration of OTC, which increased its detectability. The electrostatic interactions between DES and OTC as well as the adsorption of OTC on the surface of the modified electrode through H-bonding and π–π interactions helped in OTC detection, which was quantified based on the decrease in the anodic peak potential (E pa = 0.3 V) of AC. The electrochemical behavior of the modified electrode was investigated by cyclic voltammetry, differential pulse voltammetry, and electrochemical impedance spectroscopy. Under optimum conditions, the calibration plot of OTC exhibited a linear response in the range 5–1500 μg L–1, with a detection limit of 1.74 μg L–1. The fabricated electrochemical sensor was successfully applied to determine the OTC in shrimp pond and shrimp samples with recoveries of 83.8–100.5% and 93.3–104.5%, respectively. In addition to the high sensitivity of OTC detection, the proposed electrochemical sensor is simple, cost-effective, and environmentally friendly.

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Section: Resultsmentioning

confidence: 99%

“…Furthermore, the high conductivity of the DES accelerated the electron transfer between the analyte and electrode surface. 50 …”

Section: Resultsmentioning

confidence: 99%

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Novel and Highly Sensitive Electrochemical Sensor for the Determination of Oxytetracycline Based on Fluorine-Doped Activated Carbon and Hydrophobic Deep Eutectic Solvents

et al. 2022

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“…The sensor was produced by electro-polymerization of L-arginine on a glassy carbon electrode modified with GQDs, synthesized from glucose, functionalized multi-walled carbon nanotubes and a deep eutectic solvent (GQDs + DES + MWCNTs-COOH/PARG). The increased surface area available and the improved conductivity of the materials used improved the electrochemical behavior of the sensor, increasing the signal, due to the oxidation reaction of the analyte and allowing a linear range for the determination of paracetamol, determined by DPV analysis, of 0.10–110 mmol L −1 [ 131 ].…”

Section: Gqds Obtained By Ecofriendly Synthesis For Electrochemical Sensorsmentioning

confidence: 99%

Graphene Quantum Dots by Eco-Friendly Green Synthesis for Electrochemical Sensing: Recent Advances and Future Perspectives

et al. 2021

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The continuous decrease in the availability of fossil resources, along with an evident energy crisis, and the growing environmental impact due to their use, has pushed scientific research towards the development of innovative strategies and green routes for the use of renewable resources, not only in the field of energy production but also for the production of novel advanced materials and platform molecules for the modern chemical industry. A new class of promising carbon nanomaterials, especially graphene quantum dots (GQDs), due to their exceptional chemical-physical features, have been studied in many applications, such as biosensors, solar cells, electrochemical devices, optical sensors, and rechargeable batteries. Therefore, this review focuses on recent results in GQDs synthesis by green, easy, and low-cost synthetic processes from eco-friendly raw materials and biomass-waste. Significant advances in recent years on promising recent applications in the field of electrochemical sensors, have also been discussed. Finally, challenges and future perspectives with possible research directions in the topic are briefly summarized.

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“…Graphene quantum dots (GQDs) have been increasingly used in the construction of electrochemical sensors with desirable properties such as environmental compatibility and modifiability. [10][11][12] In addition, many studies have indicated that GQDs modified on a GCE show increased contact area of the electrode with the analyte, thus increasing the electrochemical active surface and improving the rate of electrochemical reaction. 13,14 However, GQDs may easily detach from the electrode surface due to their solubility in water.…”

Section: Introductionmentioning

confidence: 99%

Overoxidized polypyrrole/overoxidized poly(3,4-ethylenedioxythiophene)/graphene quantum dots-chitosan as enhanced electrochemical sensing platform for luteolin determination in peanut shells

et al. 2022

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An amplified electrochemical sensor employing a polymeric film and graphene quantum dots/multiwall carbon nanotubes in a deep eutectic solvent for sensitive analysis of paracetamol and 4-aminophenol

Abstract: Herein, a nanocomposite consisting of graphene quantum dots, a deep eutectic solvent and carboxyl functionalized multiwall carbon nanotubes (GQDs + DES + MWCNTs-COOH) was prepared.

Cited by 23 publications

References 35 publications

Novel and Highly Sensitive Electrochemical Sensor for the Determination of Oxytetracycline Based on Fluorine-Doped Activated Carbon and Hydrophobic Deep Eutectic Solvents

Novel and Highly Sensitive Electrochemical Sensor for the Determination of Oxytetracycline Based on Fluorine-Doped Activated Carbon and Hydrophobic Deep Eutectic Solvents

Graphene Quantum Dots by Eco-Friendly Green Synthesis for Electrochemical Sensing: Recent Advances and Future Perspectives

Overoxidized polypyrrole/overoxidized poly(3,4-ethylenedioxythiophene)/graphene quantum dots-chitosan as enhanced electrochemical sensing platform for luteolin determination in peanut shells

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