Advances in the application of nanomaterials for the electrocatalytic detection of drugs of abuse

Fakude, Colani T.; Modise, Refiloe P.; Haruna, Aderemi B.; Pillay, Jeseelan; Ozoemena, Kenneth I.

doi:10.1016/j.asems.2023.100056

Cited by 7 publications

(4 citation statements)

References 89 publications

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“…The crystal structure of prepared nanoparticles was determined by analyzing X-ray powder diffraction (XRPD) data ( Figure 1 A). The diffraction patterns of the prepared sample were indexed in the monoclinic structure type (JCPDS No:96-2002722, space group C12/ c 1(15)) of cerium tungstate, Ce 2 (WO 4 ) 3 , which matches well with the literature data for [ 18 ]. The XRPD data were also used to determine the crystallite size of cerium tungstate nanoparticles using the Scherrer equation ( D = Kʎ / cos θ) applied to the most intense diffraction peaks.…”

Section: Resultssupporting

confidence: 76%

“…Furthermore, CPE electrodes are non-toxic and environmentally friendly [ 17 ]. Although they have some disadvantages, such as lower sensitivity and reproducibility, slower kinetics of electron transfer, and lower stability in solutions, these issues can be addressed by modifying the carbon paste itself [ 18 , 19 ]. The surface of the working electrode can also be easily renewed, solving the issue of passivation [ 19 ], which makes these electrodes the most promising for developing new electrochemical sensors.…”

Section: Introductionmentioning

confidence: 99%

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Triangle-Shaped Cerium Tungstate Nanoparticles Used to Modify Carbon Paste Electrode for Sensitive Hydroquinone Detection in Water Samples

Stanković,

Đurđić,

Ognjanović

et al. 2024

Sensors

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In this study, we propose an eco-friendly method for synthesizing cerium tungstate nanoparticles using hydrothermal techniques. We used scanning, transmission electron microscopy, and X-ray diffraction to analyze the morphology of the synthesized nanoparticles. The results showed that the synthesized nanoparticles were uniform and highly crystalline, with a particle size of about 50 nm. The electrocatalytic properties of the nanoparticles were then investigated using cyclic voltammetry and electrochemical impedance spectroscopy. We further used the synthesized nanoparticles to develop an electrochemical sensor based on a carbon paste electrode that can detect hydroquinone. By optimizing the differential pulse voltammetric method, a wide linearity range of 0.4 to 45 µM and a low detection limit of 0.06 µM were obtained. The developed sensor also expressed excellent repeatability (RSD up to 3.8%) and reproducibility (RSD below 5%). Interferences had an insignificant impact on the determination of analytes, making it possible to use this method for monitoring hydroquinone concentrations in tap water. This study introduces a new approach to the chemistry of materials and the environment and demonstrates that a careful selection of components can lead to new horizons in analytical chemistry.

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Section: Resultssupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Triangle-Shaped Cerium Tungstate Nanoparticles Used to Modify Carbon Paste Electrode for Sensitive Hydroquinone Detection in Water Samples

Stanković,

Đurđić,

Ognjanović

et al. 2024

Sensors

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show abstract

“…[37][38][39] Nanoparticles possess special characteristics and a low dimensionality that render them ideal materials for electrocatalysis. 40 For achieving precise measurements, the convergence of nanotechnology with the development of smaller, and more sensitive and precise electrochemical sensors and enhancing their selectivity and specificity for detecting target analytes is imperative through optimization of composition, 41,42 pore sizes, and functionalities to perfectly induce specific interactions with the target analyte.' The nanostructured surfaces' electrocatalytic properties facilitate easy electron and mass transfer, which may lessen overpotentials and enable peak separation between the voltammetric profiles of interferents and target analyte(s).…”

Section: Application Of Modified Electrochemical Sensors For the Dete...mentioning

confidence: 99%

Review—Exploitation of Modified Electrochemical Sensors for Fast and Reliable Detection of Plastics Endocrine-Disrupting Contaminants

Sayed,

Metwally,

Nour El-Dein

et al. 2023

J. Electrochem. Soc.

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Endocrine-disrupting chemicals (EDCs) are synthetic compounds widely used in various industrial and consumer products, raising concerns about their potential adverse effects on human health and the environment. Among the numerous EDCs, Bisphenols, phthalates, and per- and poly-fluoroalkyl substances (PFAS) have attracted significant attention due to their prevalence and adverse effects. Accurately identifying and quantifying these EDCs is important for assessing exposure levels and evaluating the associated risks. This review article shed the light on recent advancements in modified electrochemical sensors and biosensors using nanomaterials, molecularly imprinted polymers (MIPs), Metal organic frameworks and nanocomposite-based electrodes, and their applicability for detecting EDCs during the past five years. The development of innovative electrode materials, optimization strategies used to increase the sensitivity and selectivity of electrochemical sensors. The challenges of real-world sample analysis are investigated as well along with possible solutions, such as matrix interference and detection limitations. Future perspectives and emerging trends in the electrochemical detection of EDCs, are also elaborated with a particular emphasis on developments in portable and miniaturized devices, multiplexed sensing platforms, and the incorporation of machine learning and artificial intelligence for better data analysis, and on-site detection.

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“…In voltammetric analysis, quantitative and qualitative information is obtained from the peak height and specific voltammetric potential. Improvement of the voltammetric signal includes the introduction of new electrode materials [1][2][3][4][5] and the modification of the electrode surface [6][7][8]. The concept of electrode surface modification can bring two main advantages for electroanalysis: i) facilitating ion/electron exchange between electrode and analyte; ii) increasing the selectivity through the binding of the signal molecule by the modified materials.…”

Section: Introductionmentioning

confidence: 99%

Selective Recognition of Synthetic Stimulants via a Thio-phene-Derived Polymeric Layer on Graphite Electrodes

Shishkanova,

Štěpánková,

Broncová

et al. 2024

Preprint

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Modification of electrode surface with a selective layer gives the possibility to detect target ana-lytes of forensic interest. 3-(4-trifluoromethyl)-phenyl)-thiophene (ThPhCF3) was deposited on a graphite (G) electrode by electrochemical oxidation and characterized as a receptor for the recognition of synthetic stimulants (2-aminoindane, buphedrone, naphyrone). First, the structural characterization of the polymeric layer were obtained from Raman spectroscopy. Second, the electrochemical profiles of selected synthetic stimulants and their affinity to ThPhCF3/G-modified electrodes were studied using square wave voltammetry and electrochemical impedance spec-troscopy. The values of the adsorption constant show the importance of – PhCF3 groups in the interaction with synthetic stimulants, namely recognition by the formation of hydrogen bonds (Kads (buphedrone) < Kads (2-AI)) and interaction with aromatic H atoms (Kads (buphedrone) < Kads (naphyrone)). It was demonstrated that the polymeric layer derived from thiophene with – PhCF3 group is capable to increase the intensity of the electrochemical signal.

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Advances in the application of nanomaterials for the electrocatalytic detection of drugs of abuse

Cited by 7 publications

References 89 publications

Triangle-Shaped Cerium Tungstate Nanoparticles Used to Modify Carbon Paste Electrode for Sensitive Hydroquinone Detection in Water Samples

Triangle-Shaped Cerium Tungstate Nanoparticles Used to Modify Carbon Paste Electrode for Sensitive Hydroquinone Detection in Water Samples

Review—Exploitation of Modified Electrochemical Sensors for Fast and Reliable Detection of Plastics Endocrine-Disrupting Contaminants

Selective Recognition of Synthetic Stimulants via a Thio-phene-Derived Polymeric Layer on Graphite Electrodes

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