四电极系统下辅酶Q10在氧化锌纳米棒修饰电极上的光电检测  

Photoelectrochemical Determination of Ubiquinone 10 by ZincOxide Nanorods Modified Photoelectrode with a Four-electrode System

作　　者：罗贵铃 牛燕燕[1] 邵波 张晓萍 赵常志 孙伟[1] LUO Gui-Ling;NIU Yan-Yan;SHAO Bo;ZHANG Xiao-Ping;ZHAO Chang-Zhi;SUN Wei(Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province,College of Chemistry and Chemical Engineering,Hainan Normal University,Haikou 571158,China;College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science of Ministry of Education,Qingdao 266042,China)

机构地区：[1]海南师范大学化学与化工学院,海南省激光技术与光电功能材料重点实验室,海口571158 [2]青岛科技大学化学与分子工程学院,光电传感与生命分析教育部重点实验室,青岛266042

出　　处：《分析化学》2020年第9期1169-1176,共8页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金项目(Nos.21665007,21964007);国家级大学生创业训练项目(No.30101100307);青岛科技大学化学学部开放项目(No.QUSTHX201935)资助。

摘　　要：采用电沉积法制备了ZnO纳米棒修饰氧化铟锡(ITO)电极(ZnONR/ITO),利用四电极系统建立了一种高灵敏检测辅酶Q10(UQ10)的光电化学分析新方法。利用玻碳电极为第二工作电极,将溶液中UQ10预还原为UQ10H2,可作为电子供体在ZnONR/ITO上发生氧化反应,电子跃迁至导带后,光电流降低,进而用于检测UQ10。对电沉积ZnO纳米棒和光电化学检测条件进行了优化,在最优测定条件下,UQ10浓度的对数与光电流成反比,线性检测范围为1.0×10^12~1.0×10^5 mol/L,检出限为3.3×10^13 mol/L(S/N=3)。A novel photoelectrochemical analytical method for ultrasensitive determination of ubiquinone 10(UQ10)was established by using electrodeposited ZnO nanorods modified indium tin oxide electrode(ZnONR/ITO)as the first working electrode and glassy carbon electrode(GCE)as second working electrode.UQ10 was reduced to UQ10H 2 on GCE,which was acted as electron donor with following oxidation on ZnONR/ITO with reduced photocurrent for UQ10 determination.The conditions for electrodeposited ZnONR and photoelectrochemical detection were optimized.Under the optimal conditions,the photocurrent were proportional to the logarithm of the UQ10 concentration in the range of 1.0×10^12-1.0×10^5 mol/L with a detection limits of 3.3×10^13 mol/L(S/N=3).

关 键 词：辅酶Q10 光电化学分析 四电极系统 氧化锌纳米棒 

分 类 号：O657.1[理学—分析化学]