介孔炭/纳米金修饰玻碳电极的制备及其应用研究  

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

作　　者：屈颖娟[1] 李江涛[1] 韩敏[1] 杨晓慧[1] 苏敏刚 

机构地区：[1]西安文理学院化学与化学工程学院

出　　处：《分析测试学报》2014年第11期1317-1321,共5页Journal of Instrumental Analysis

基　　金：西安市科技计划"文理专项"基金(CXY1352WL22);陕西省分析化学重点学科经费;秦岭北麓水资源保护利用研究项目资助(HW2013-10)

摘　　要：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。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 effec- tive 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 reduc- tire peak current of HQ were greatly increased on the chemically modified electrode, and the oxida- tion 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-s mol/L. This method was ap- plied in the determination of HQ in real sample with high accuracy and reproducibility.

关 键 词：介孔炭 纳米金 对苯二酚 修饰电极 

分 类 号：O657.1[理学—分析化学] O625.312[理学—化学]