High sensitivity of TiO2 nanorod array electrode for photoelectrochemical glucose sensor and its photo fuel cell application

Abstract

Due to the separation of the excitation source and detection signal, the use of photoelectrochemical (PEC) glucose sensors is regarded as a promising electrochemical approach offering high sensitivity for glucose analysis by photoelectrocatalytic oxidation of glucose. In this study, we present a PEC glucose sensor based on TiO2 nanorod array (TiO2NRA) electrode, exhibiting high sensitivity of around 200 μA cm−2 mM−1 in glucose detection for the concentrations in the range of 0.01–0.20 mM. Moreover, the TiO2NRA can be fabricated and used in a photo fuel cell (PFC) to generate electricity. This investigation expands the applications of TiO2 and provides a high sensitive way for glucose sensing.