材料科学
计时安培法
纳米复合材料
循环伏安法
抗坏血酸
傅里叶变换红外光谱
电化学气体传感器
核化学
电化学
检出限
安培法
聚苯胺
聚合
化学工程
电极
纳米技术
化学
色谱法
聚合物
复合材料
物理化学
工程类
食品科学
作者
Asia Nisar,Muzamil Ahmad Khan,Zakir Hussain
标识
DOI:10.1007/s43207-021-00166-w
摘要
In this research study, a highly selective and sensitive electrochemical sensor was designed by coating the glassy carbon electrode (GCE) with the novel PANI/MOF-199/Ag nanocomposite for the non-enzymatic electrochemical detection of dopamine (DA). PANI/MOF-199/Ag nanocomposite was prepared by the in situ chemical oxidative polymerization of aniline monomer in the presence of MOF-199 followed by the deposition of Ag nanoparticles using an in situ chemical reduction route. Characterization techniques such as Scanning electron microscopy (SEM), X-ray powder diffraction (XRD), Fourier transform infra-red spectroscopy (FTIR), and Raman analysis were used to find out the successful synthesis of the prepared samples. Meanwhile, the electrochemical performance was investigated by chronoamperometry (CA) and cyclic voltammetry (CV) not only at different molar concentrations of DA but also with various compositions of Ag nanoparticles loaded. The PANI/MOF-199/Ag-3% modified electrode exhibited good electro-catalytic activity with high sensitivity of 1.421 µA µM−1 cm−2 and a low detection limit (LOD) of 0.22 µM (S/N = 3) towards DA. Moreover, in the presence of common interfering biological compounds such as glucose (Glu), uric acid (UA), and ascorbic acid (AA), the fabricated electrochemical sensor was found selective to DA detection.
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