期刊论文

Li Guang-Li;Deng Pei-Hong

中文

分析化学

0253-3820

2018

46

3

438-445

10.11895/j.issn.0253-3820.171183

National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [61703152]; Natural Science Foundation of Hunan Province, ChinaNatural Science Foundation of Hunan Province [2016JJ4010]; Hengyang Normal University Provincial Platform Open Fund Project, China [GD16K02]

本校为通讯机构

通过电化学还原法制备MnO_2纳米线/还原石墨烯复合修饰电极(MnO_2-RGO/GCE),用于多巴胺(DA)的检测。采用扫描电镜和X-射线粉末衍射对不同的修饰电极微观形貌进行了表征,优化了电化学还原条件和测定DA实验条件。此外,还研究DA在裸电极及RGO或MnO_2-RGO修饰电极上的循环伏安响应。 MnO_2-RGO/GCE复合修饰电极实现AA、DA和UA氧化峰的有效分离,AA-DA和DA-UA的氧化峰电位差分别为268和128 mV。检测DA的线性范围为0.06~ 1.0 μmol/L和1.0~ 80 μmol/L,检出限为1.0 nmol/L(S/N= 3)。制备的MnO_2-RGO/GCE成功用于人血清样品的多巴胺含量分析。

MnO_2 nanowires-reduced graphene oxide composite (MnO_2-RGO) was used to modify glassy carbon electrodes (GCE) and applied for the electrochemical determination of dopamine (DA). The microstructure of MnO_2 nanowires and MnO_2-RGO nanocomposite material was characterized by scanning microscope and X-ray powder diffraction. Then the electrochemical reduction condition for preparing MnO_2- RGO/GCE and experimental conditions for determining DA were optimized systematically. The electrochemical behavior of DA on the bare electrode and RGO or MnO_2...