化学
抗坏血酸
循环伏安法
偶氮苯
石墨烯
微分脉冲伏安法
介电谱
扫描电子显微镜
纳米复合材料
核化学
电化学
电化学气体传感器
氧化物
无机化学
电极
有机化学
纳米技术
材料科学
复合材料
物理化学
分子
食品科学
作者
Shining Wu,Haoran Wang,Bo Zhao,Tongtong Cao,Jie Ma,Lin Liu,Zhiwei Tong
出处
期刊:Talanta
[Elsevier]
日期:2022-01-01
卷期号:237: 122986-122986
被引量:28
标识
DOI:10.1016/j.talanta.2021.122986
摘要
A highly sensitive cationic polyfluorinated azobenzene/reduced graphene oxide (C3F7-azo+/RGO) nanocomposite electrochemical sensor for simultaneous detection of dopamine (DA), ascorbic acid (AA) and uric acid (UA) was successfully synthesized using a facile exfoliation/restacking method. The nanocomposite is self-assembled from oppositely charged graphene oxide nanosheets (GO) and polyfluorinated azobenzene cations (C3F7-azo+), and then obtained by electrochemical reduction. The structure and electrochemical properties were characterized by X-ray diffraction (XRD), energy dispersive spectrometer analysis (EDS), transmission electron microscope (TEM) and scanning electron microscope (SEM). The electrochemical property of C3F7-azo+/RGO was characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and differential pulse voltammetry (DPV). It can be clearly seen from experimental results that C3F7-azo+/RGO-modified electrode (C3F7-azo+/RGO/GCE) can detect DA, AA and UA simultaneously, and has good stability and anti-interference performance. The detection limits are 65 nM, 8 nM and 11 nM for DA, AA and UA in the ranges 57.28-134.28 μM, 0.04-6.01 μM, 9.23-23.45 μM, respectively.
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