Citation: LUO Gui-Ling, NIU Yan-Yan, SHAO Bo, ZHANG Xiao-Ping, ZHAO Chang-Zhi, SUN Wei. Photoelectrochemical Determination of Ubiquinone 10 by Zinc Oxide Nanorods Modified Photoelectrode with a Four-electrode System[J]. Chinese Journal of Analytical Chemistry, ;2020, 48(9): 1169-1176. doi: 10.19756/j.issn.0253-3820.201181 shu

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

1.
Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China;
2.
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

Received Date: 5 April 2020
Revised Date: 18 June 2020

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos. 21665007, 21964007),the National College Students Innovation and Entrepreneurship Training Program (No. 30101100307) and the Open Project of Chemistry Department of Qingdao University of Science and Technology (No. QUSTHX201935).

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 UQ10H₂ 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).
- Ubiquinone 10,
- Photoelectrochemical analysis,
- Four-electrode system,
- Zinc oxide nanorods
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