二茂铁功能化石墨烯复合材料的制备及其电催化多巴胺性质研究

Preparation for Composite Materials of Ferrocene Functionalized Graphene and Research on Its Electrocatalytic Properties Towards Dopamine

利用氧化石墨烯片边缘的羧基和表面的环氧基团共价修饰的方法制备了二茂铁功能化石墨烯的复合材料,通过FT-IR、TEM等测试方法对复合材料的结构和形貌进行了表征,二茂铁共价修饰石墨烯复合材料呈现出了良好的稳定性。我们进一步利用二茂铁功能化石墨烯修饰电极对多巴胺电化学催化性质进行研究,该修饰电极对多巴胺显示出良好的催化活性,并推测出可能的催化反应机理,当信噪比为3时,检测限达到0.01μM。

Ferrocene functionalized graphene （Fc-Gr） was prepared by covalently functionalizing through replacement of the carboxyl group at the edges and epoxide group at the planar of graphene nanosheets.The structure of ferrocene functionalized graphene was confirmed by FTIR.The morphologies of graphene oxide and functionalized graphene nanosheets were characterized by transmission electron microscopy （TEM） .Moreover,the electrocatalytic properties to-wards the oxidation of dopamine were investigated.It was found that Fc-Gr modified GCE exhibits good catalytic activi-ty towards the oxidation of dopamine.The lowest detection limit （S/N=3） was 0.01μM.The possible mechanism for the electrocatalytic oxidation of DA was speculated.It demonstrates that Fc-Gr can be applied in chemical sensors and biosensors.