介孔炭/纳米金修饰玻碳电极的制备及其应用研究

制备了介孔炭/纳米金修饰玻碳电极,并对对苯二酚(HQ)在该修饰电极上的电化学行为进行了研究。与HQ在纯介孔炭材料修饰玻碳电极上的电化学响应相比,HQ在该修饰电极上的氧化峰和还原峰电流均大大增加,表明纳米金与介孔炭复合后对HQ具有良好的催化作用。HQ在该修饰电极上经过富集后,峰电流明显增大。采用循环伏安法对HQ电化学行为进行研究,结果表明,HQ在3.0×10-8~1.0×10-6mol/L和1.0×10-6~1.0×10-4mol/L浓度范围内与峰电流呈良好的线性关系,据此建立了检测HQ的电化学分析方法。该方法的相对标准偏差为0.69%,检出限(S/N=3)为1.0×10-8mol/L,具有较高的稳定性和灵敏度。

Preparation of Mesoporous Carbon/Gold Nanoparticles Composite Modified Electrode and Its Application

In this paper,the conditions for preparation of the mesoporous carbon/gold nanoparticles modified glassy carbon electrode were investigated.It was found that the modified electrode had effective catalytic activity to hydroquinone(HQ).Compared to those of HQ on the mesoporous carbon modified glassy carbon electrode in electrochemical response,the oxidation peak current and reductive peak current of HQ were greatly increased on the chemically modified electrode,and the oxidation peak potential of HQ decreased.The modified electrode showed a good catalytic effect to HQ.In the optimum conditions,the electrochemical behavior of HQ on the modified electrode was studied.The results showed that concentration of HQ in the ranges of 3.0×10-8-1.0×10-6 mol/L and 1.0×10-6-1.0×10-4 mol/L had good linear relationships between electrochemical response signals and HQ concentrations,with a detection limit(S/N=3) of 1.0×10-8 mol/L.This method was applied in the determination of HQ in real sample with high accuracy and reproducibility.