期刊论文

Fabrication of nano Fe_3O_4-reduced graphene oxide composite modified glassy carbon electrode and its application for the determination of dopamine

He, Quanguo(hequanguo@126.com)

中文

复合材料学报

1000-3851

2018

35

9

2542-2550

10.13801/j.cnki.fhclxb.20171208.002

国家自然科学基金（61703152） 湖南工业大学博士学科建设项目 湖南省自然科学基金（2016JJ4010） 株洲科技计划项目 衡阳师范学院省级平台开放基金（GD16K02）

本校为其他机构

通过电化学还原法制备纳米Fe_3O_4-还原氧化石墨烯复合修饰玻碳(Fe_3O_4-rGO/GCE)电极,用于多巴胺(DA)的检测。采用SEM、TEM和循环伏安对纳米Fe_3O_4-rGO复合材料进行表征。在pH为7.0的磷酸盐缓冲液(PBS)中,采用循环伏安法研究了DA在纳米Fe_3O_4-rGO/GC上的电化学行为。实验结果表明,较裸GC电极和rGO修饰(rGO/GC)电极,由于纳米Fe_3O_4与rGO的协同作用,纳米Fe_3O_4-rGO/GC显著增大了Fe_3O_4-rGO/GC复合材料电极电化学活性面积和氧化峰电流强度i_(pa)。DA的浓度在6.0×10~(-8)~2.0×10~(-6) mol/L和2.0×10~(-6)~8.0×10~(-5) mol/L范围内,与氧化峰电流强度i_(pa)呈良好的线性关系,检出限达4.0×1...

The nano Fe3O4-reduced graphene oxide composite modified glassy carbon (Fe3O4-rGO/GC) electrode was fabricated by electrochemical reduction method, and used for the determination of dopamine (DA).The nano Fe3O4-rGO composites were characterized by SEM, TEM and cyclic voltammetry. The electrochemical behavior of DA was investigated in pH=7.0 phosphate buffer saline (PBS) by cyclic voltammetry. Compared with bare GC electrode and rGO-modified (rGO/GC) electrode, the electrochemical active area and the oxide peak current ipa of Fe3O4-rGO/GC electr...