Development of a Novel Electrochemical Sensor Based on Gold Nanoparticle-Modified Carbon-Paste Electrode for the Detection of Congo Red Dye

Ganash, Aisha A.; Alshammari, Sahar; Ganash, Entesar Ali

doi:10.3390/molecules28010019

Cited by 19 publications

(10 citation statements)

References 57 publications

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“…Scanning electron microscopy (SEM) of both the bare carbon paste matrix and those fortified with iron oxide nanoparticles reveals a highly porous surface structure with a high degree of surface roughness (Figure a). , Iron oxide nanoparticles were dispersed within the paste matrix and strongly attached onto the graphite nanosheets with improved homogeneity of the paste. Moreover, FeONPs were uniformly distributed on the paste surface, with the particle size in the nanometer range.…”

Section: Resultsmentioning

confidence: 99%

Novel Iron Oxide Nanoparticle-Fortified Carbon Paste Electrode for the Sensitive Voltammetric Determination of Atomoxetine

et al. 2023

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Herein, the fabrication and full characterization of a novel atomoxetine (ATX) voltammetric carbon paste electrode (CPE) fortified with iron oxide nanoparticles (FeONPs) is demonstrated. Modification of the carbon paste matrix with the metallic oxide nanostructure provides proper electrocatalytic activity against the oxidation of ATX molecules at the carbon paste surface, resulting in a noticeable improvement in the performance of the sensor. At the recommended pH value, ATX recorded an irreversible anodic peak at 1.17 V, following a diffusion-controlled reaction mechanism. Differential pulse voltammograms exhibited peak heights linearly correlated to the ATX content within a wide concentration range from 45 to 8680 ng mL–1, with the limit of detection reaching 11.55 ng mL–1. The electrooxidation mechanism of the ATX molecule was proposed to be the oxidation of the terminal amino group accompanied by the transfer of two electrons and two protons. The fabricated FeONPs/CPE sensors exhibited enhanced selectivity and sensitivity and therefore can be introduced for voltammetric assaying of atomoxetine-indifferent pharmaceutical and biological samples in the presence of its degradation products and metabolites.

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Section: Resultsmentioning

confidence: 99%

Novel Iron Oxide Nanoparticle-Fortified Carbon Paste Electrode for the Sensitive Voltammetric Determination of Atomoxetine

et al. 2023

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“…In the past few years, some techniques have been developed for the determination of CR, such as ultraviolet-visible (UV-vis) absorption spectrometry, 2 uorescent methods, 1,4,5,7 electrochemical methods, 3,6,8 surface-enhanced Raman scattering (SERS), 9 high-performance liquid chromatography (HPLC) 10 and so on. The UV-vis absorption spectrometry is a commonly used method for quantifying CR.…”

Section: Introductionmentioning

confidence: 99%

Simple fluorescence “turn-off” assay for Congo red using commercial 2-aminophthalic acid

Qian,

Li,

Jiang

et al. 2024

Anal. Methods

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“…The application of MIPs (Fe 3 O 4 @MIPs) onto the electrodes (electrochemical sensors) enhances their selectivity/specificity and makes them worthy of multiple applications [ 17 ]. The polymeric materials are non-conductive in nature, hence they are mixed with a conductive material, such as graphite to synthesize the MMIPs-based sensors [ 18 , 19 ]. Currently, a novel “core@shell-molecularly-imprinted-magnetic polymers-based sensors” (Fe 3 O 4 @MIPs) will be synthesized for the precise detection of SY dye in environmental samples.…”

Section: Introductionmentioning

confidence: 99%

Biomimetic Electrochemical Sensors Based on Core-Shell Imprinted Polymers for Targeted Sunset Yellow Estimation in Environmental Samples

Malik

Khan

et al. 2023

Biosensors

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Magnetic molecularly imprinted polymers (MMIPs) contain the predesigned specialized recognition capability that can be chosen to build credible functional materials, that are easy to handle and have a good degree of specificity. Hence, the given piece of work is intended to design a novel electrochemical sensor incorporating magnetite-based molecularly imprinted polymers. The building materials consisted of a cross-linker (EGDMA), reaction-initiator (AIBN), monomer (methylene succinic acid-MSA), and template molecule (Sunset Yellow-SY dye). MMIPs exhibited a diameter of 57 nm with an irregular shape due to the presence of cavities based on SEM analysis. XRD patterns exhibited crystallinity, as well as amorphous peaks that are attributed to polymeric and non-polymeric frameworks of MMIPs. The crystallite size of the MMIPs from XRD analysis was found to be 16.28 nm based on the Debye-Scherrer’s equation. Meanwhile, the FTIR bands showed the synthesis of MMIPs using monomer and methylene succinic acid. The sorption data at the optimized operating conditions (pH 2, sorbent dosage 3 mg, time 18 min) showed the highest sorption capacity of 40 mg/g. The obtained data best fitted to the Langmuir sorption isotherm and followed the pseudo-second-order kinetics. The magneto-sensors were applied for ultrasensitive, rapid, and simple sensing of SY dye. The electrochemical experiments were run at the operating condition range of (scan rate 10–50 mV/s, tads 0–120 s, pH 5–9, potential range 1–1.5 V for CV and 1–1.3 V for SWAdASV). The linear range of detection was set to 1.51 × 10−6 M to 1.51 × 10−6 M posing LOD and LOQ values of 8.6242 × 10−5 M and 0.0002874 M, respectively. The regression analysis value for the calibration was found to be 0.950. Additionally, high adsorption efficiency, selectivity, reusability, and strong structural stability of the magneto-sensors showed potential use for SY detection in real samples. These characteristics make MMIPs a viable electrochemical substrate for the detection of chemical contaminants in the environment and in health-related products.

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Development of a Novel Electrochemical Sensor Based on Gold Nanoparticle-Modified Carbon-Paste Electrode for the Detection of Congo Red Dye

Cited by 19 publications

References 57 publications

Novel Iron Oxide Nanoparticle-Fortified Carbon Paste Electrode for the Sensitive Voltammetric Determination of Atomoxetine

Novel Iron Oxide Nanoparticle-Fortified Carbon Paste Electrode for the Sensitive Voltammetric Determination of Atomoxetine

Simple fluorescence “turn-off” assay for Congo red using commercial 2-aminophthalic acid

Biomimetic Electrochemical Sensors Based on Core-Shell Imprinted Polymers for Targeted Sunset Yellow Estimation in Environmental Samples

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