Au/SiO_2纳米粒子修饰玻碳电极的制备及其应用  

The preparation and applications of Au/SiO_2 nanoparticles modified glassy carbon electrode

作　　者：刘晓琴[1] 唐洁[2] 

机构地区：[1]汉中职业技术学院药学与医学技术系,陕西汉中723002 [2]陕西理工学院物理与电信工程学院,陕西汉中723001

出　　处：《应用化工》2013年第3期460-462,共3页Applied Chemical Industry

基　　金：陕西省教育厅专项科研基金(11JK0930)

摘　　要：通过电化学法将二氧化硅和金纳米粒子同步沉积到玻碳电极表面,制得Au/SiO2纳米粒子修饰电极(Nano-Au/SiO2/GCE)。采用电子扫描显微镜和交流阻抗考察该修饰电极形貌及其电化学性能,并研究了NADH在该修饰电极上的电化学行为。结果表明,NADH在修饰电极上的氧化峰峰电位降低约300 mV,峰电流明显增大。在最佳实验条件下,其电流响应与NADH浓度在1.0×10-6～1.0×10-4mol/L呈良好的线性关系,相关系数0.998。Au/SiO2 Nanoparticles modified glassy carbon electrode was generated by electro-assisted deposition. SEM and EIS were used to characterize the morphology and electrochemical performance of nano- Au/SiO2/GCE ,the electrochemical performance of the modified electrode towards the oxidation of NADH was studied. Results showed that the oxidation overpotential of NADH was reduced approximately 300 mV and the oxidation current increased significantly at the nano-Au/SiO2 electrode than that at the GCE. Under optimal experimental conditions, good linear relationship was found between the oxidation current and concentration of NADH in the range of 1.0×10^-6～1.0×10^-4mol/L and the correlation coefficient was 0. 998.

关 键 词：修饰电极 共沉积 AU SIO2纳米粒子 

分 类 号：TQ016[化学工程] O657.1[理学—分析化学]