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A glassy carbon electrode modified with carbon nanoonions for electrochemical determination of fentanyl

微分脉冲伏安法 电化学 材料科学 电化学气体传感器 电极 检出限 支撑电解质 电荷转移系数 芬太尼 玻璃碳 电解质 循环伏安法 扩散 分析化学(期刊) 化学 色谱法 物理化学 外科 物理 热力学 医学
作者
Esmail Sohouli,Amir Homayoun Keihan,Faezeh Shahdost-fard,Ebrahim Naghian,Marta E. Płońska‐Brzezińska,Mehdi Rahimi‐Nasrabadi,Farhad Ahmadi
出处
期刊:Materials Science and Engineering: C [Elsevier BV]
卷期号:110: 110684-110684 被引量:90
标识
DOI:10.1016/j.msec.2020.110684
摘要

Fentanyl is a pain reliever stronger and deadlier than heroin. This lethal drug has killed many people in different countries recently. Due to the importance of the diagnosis of this drug, a fentanyl electrochemical sensor is developed based on a glassy carbon electrode (GCE) modified with the carbon nanoonions (CNOs) in this study. Accordingly, the electrochemical studies indicated the sensor is capable of the voltammetric determination of traces of fentanyl at a working potential of 0.85 (vs. Ag/AgCl). To obtain the great efficiency of the sensor some experimental factors such as time, the potential of accumulation and pH value of the electrolyte were optimized. The results illustrated a reduction and two oxidation peaks for fentanyl in phosphate buffer (PB) with pH = 7.0 under a probable mechanism of electrochemical–chemical–electrochemical (ECE). The differential pulse voltammetry (DPV) currents related to the fentanyl detection were linear with an increase of fentanyl concentrations in a linear range between 1 μM to 60 μM with a detection limit (LOD) of 300 nM. Furthermore, the values of the diffusion coefficient (D), transfer coefficient (α) and catalytic constant rate (kcat) were calculated to be 2.76 × 10−6 cm2 s−1, 0.54 and 1.76 × 104 M−1 s−1, respectively. These satisfactory results may be attributed to utilizing the CNOs in the electrode modification process due to some of its admirable characterizations of this nanostructure including high surface area, excellent electrical conductivity and good electrocatalytic activity. Consequently, these finding points the achieving a simple sensing system to measure of the fentanyl as an important drug from the judicial perspective might be a dream coming true soon.
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