期刊论文

Preparation of Cu_2O-Reduced Graphene Nanocomposite-Modified Electrodes and Their Application in Detection of Dopamine

中文

食品科学

1002-6630

2018

39

20

308-314

10.7506/spkx1002-6630-201820044

国家自然科学基金青年科学基金项目（61703152） 湖南省自然科学基金青年基金项目（2016JJ4010 2018JJ3134） 株洲市科技计划项目（201707-201806）

本校为其他机构

通过电化学还原法制备纳米Cu_2O/还原石墨烯复合修饰电极(Cu_2O-reduced graphene oxide nanocomposite modified glass carbon electrode,Cu_2O-RGO/GCE),用于多巴胺(dopamine,DA)的检测。采用扫描电镜和X-射线粉末衍射仪对不同修饰电极进行微观形貌表征,进一步优化电化学还原条件和测定DA实验条件。此外,通过循环伏安法考察DA在裸电极及RGO或Cu_2O-RGO上的电化学响应。Cu_2O-RGO/GCE实现抗坏血酸(ascorbic acid,AA)、DA和尿酸(uric acid,UA)氧化峰的有效分离,AA-DA和DA-UA的氧化峰电位差分别为204 mV和144 mV。该修饰电极检测的线性范围为1×10~(-8)~1×10~(-6) mol/L和1×10~(-6)~8×10~(-5)...

Cu_2O-reduced graphene oxide nanocomposite (Cu_2O-RGO) was applied to modify glassy carbon electrodes (GCE) in order to determine dopamine (DA). The microstructure of the modified electrodes was characterized by scanning electron microscope (SEM) and X-ray differentiation (XRD). Then the electrochemical reduction conditions for preparing Cu_2O-RGO/GCE and the experimental conditions for detecting DA were optimized. The electrochemical behavior of DA on the bare electrode and RGO or Cu_2O-RGO modified electrodes was also investigated in pH 3.5 p...