Voltammetric and electro-kinetic assessment of prucalopride at MnO2-rGO fabricated pencil graphite electrode

IF 3.2 4区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Journal of the Indian Chemical Society Pub Date : 2024-10-02 DOI:10.1016/j.jics.2024.101405
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Abstract

Development and design of rGO-based nanocomposite-modified carbon-based electrodes are necessary to enhance the selectivity and desired selectivity of the voltammetric sensors. In this work, a manganese dioxide-reduced graphene oxide (MnO2-rGO) fabricated pencil graphite electrode is described for the detection of prucalopride (PRU), which is used to treat chronic idiopathic constipation. A simple cost effective hydrothermal method was used to synthesize the needle-shaped MnO2. The MnO2-rGO nanocomposite was characterized using XRD, SEM, and FTIR spectroscopy to examine its microstructure and morphology. The results revealed that MnO2 needles are distributed on the flakes of the rGO, thereby enhancing the electro-catalytic activity of MnO2-rGO/PGE. The electrochemical performance of the developed MnO2-rGO/PGE was examined using CV, chronocoulometry, SWSV, and DPSV methods. The diffusion-controlled oxidation of the PRU at the MnO2-rGO/PGE produces an irreversible peak in all the voltammograms which were used to calculate several electro-kinetic parameters like electron transfer coefficient (α = 0.598), diffusion coefficient (Do = 1.62 × 10−5 cm2s−1), surface coverage (Γo = 1.55 × 10−9 molcm−2), and effective surface area. Furthermore, advanced SWSV and DPSV methods are proposed for the accurate, selective, and sensitive detection of the PRU in pharmaceutical samples. The reported values of detection limit (LOD) for the proposed SWSV and DPSV methods are 20.39 μM and 14.53 μM, respectively, which make them eco-friendly and affordable alternative tools for the quantification of the PRU in pharmaceutical samples.

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在 MnO2-rGO 制成的铅笔石墨电极上对普鲁卡必利进行伏安和电动力学评估
开发和设计基于 rGO 的纳米复合材料改性碳基电极对于提高伏安传感器的选择性和预期选择性非常必要。在这项工作中,描述了一种二氧化锰还原氧化石墨烯(MnO2-rGO)制备的铅笔石墨电极,用于检测普鲁卡必利(PRU),普鲁卡必利用于治疗慢性特发性便秘。该研究采用了一种成本低廉的水热法合成针状二氧化锰。利用 XRD、SEM 和傅立叶变换红外光谱对 MnO2-rGO 纳米复合材料的微观结构和形态进行了表征。结果表明,MnO2 针分布在 rGO 的薄片上,从而提高了 MnO2-rGO/PGE 的电催化活性。研究人员采用 CV 法、计时器法、SWSV 法和 DPSV 法检测了所开发的 MnO2-rGO/PGE 的电化学性能。PRU 在 MnO2-rGO/PGE 上的扩散控制氧化作用在所有伏安图中都产生了不可逆峰,这些不可逆峰被用来计算多个电动力学参数,如电子转移系数(α = 0.598)、扩散系数(Do = 1.62 × 10-5 cm2s-1)、表面覆盖率(Γo = 1.55 × 10-9 molcm-2)和有效表面积。此外,还提出了先进的 SWSV 和 DPSV 方法,用于准确、选择性和灵敏地检测药物样品中的 PRU。所提出的 SWSV 和 DPSV 方法的检测限 (LOD) 值分别为 20.39 μM 和 14.53 μM,这使它们成为药物样品中 PRU 定量的环保且经济实惠的替代工具。
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来源期刊
CiteScore
3.50
自引率
7.70%
发文量
492
审稿时长
3-8 weeks
期刊介绍: The Journal of the Indian Chemical Society publishes original, fundamental, theorical, experimental research work of highest quality in all areas of chemistry, biochemistry, medicinal chemistry, electrochemistry, agrochemistry, chemical engineering and technology, food chemistry, environmental chemistry, etc.
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