Citation: Anna Su, Qiumei Lei, Gaoqi Tian, Yaolan Yang, Shuqing He, Li Yan, Xin Hu, Tao Ji, Shijie Li, Junqing Hu. An Enzyme-free Glucose Sensing Device Based on TiO2 Nanorod Array Photoelectric Catalysis[J]. Chinese Journal of Structural Chemistry, ;2023, 42(9): 100133. doi: 10.1016/j.cjsc.2023.100133 shu

An Enzyme-free Glucose Sensing Device Based on TiO2 Nanorod Array Photoelectric Catalysis

A simple one-step hydrothermal method is used to prepare an enzyme-free photoelectric combined glucose sensor based on TiO2NRs/FTO with low cost, sample two-electrode, and excellent detection. Under 380 nm light (0.5 mW cm–2 ) irradiation and a positive voltage, holes are accumulated on TiO2NRs surface, catalyzing glucose and forming a photocurrent without the need for an enzyme, such as Glucose oxidase (GOx). The designed sensor exhibits high sensitivity (about 0.96 μA mM–1 cm–2, without GOx) and excellent linear relationship in the glucose concentration range of 5–15 mML–1. The prepared glucose sensor performs better with a sensitivity of 1.48 μA mM–1 cm–2 when a certain amount of GOx is mixed in the detected solution. In addition, the sensor has excellent anti-interference resistance to non-reducing chitosan and reducing ascorbic acid with short response time (less than 5 s); thus, it can be used in quick detection with a double electrode system. This sensing device has the advantages of simple fabrication, easy storage, and reusability; therefore, it can be very promising in the portable and rapid monitoring of human blood glucose levels.
- Glucose,
- TiO2,
- Enzyme-free,
- Photocatalysis,
- Electrochemical biosensor
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