化学
扫描电子显微镜
电极
微分脉冲伏安法
检出限
纳米复合材料
循环伏安法
银纳米粒子
聚合
水平扫描速率
电化学
玻璃碳
核化学
支撑电解质
化学工程
纳米颗粒
分析化学(期刊)
纳米技术
材料科学
色谱法
聚合物
有机化学
复合材料
物理化学
工程类
作者
Majid Arvand,Maryam Habibi,Shiva Hemmati
标识
DOI:10.1016/j.jelechem.2016.12.048
摘要
In this research, the manufacturing of highly sensitive and effective electrochemical sensor is presented. It is based on silver nanoparticles/poly(3-methylthiophene) (Ag–NPs/P3MT) nanocomposite for the detection of galantamine hydrobromide (Gal). In this process, Ag–NPs/P3MT modified electrode was fabricated by electro-polymerization of 3-methylthiophene (3MT) in the presence of silver nitrate on the surface of the glassy carbon electrode (GCE). Scanning electron microscopy (SEM), field emission scanning electron microscopy (FE–SEM) and energy dispersive X–ray (EDX) analysis were employed to characterize the constructed sensor. Compared with unmodified and P3MT modified electrodes, the Ag–NPs/P3MT modified electrode demonstrated superb electrochemical catalytic activity and significantly enhanced the oxidation peak current of Gal. The experimental parameters, such as supporting electrolyte and its pH, the number of cycles for the electro-polymerization and the scan rate for the sensor preparation were optimized. Under the optimal conditions, the proposed electrode exhibited excellent sensing performance for detecting of Gal using differential pulse voltammetry over the concentration range of 1.0 to 700 μM and a detection limit of 0.18 μM. Finally, the excellent results showed that the modified electrode can be successfully applied to quantitatively measure of Gal in human cerebrospinal fluid (CSF), Narcissus and pharmaceutical real samples with satisfactory consequences.
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