α-Fe2O3 Film with Highly Photoactivity for Non-enzymatic Photoelectrochemical Detection of Glucose

A non-enzyme photoelectrochemical (PEC) glucose sensor based on α-Fe 2 O 3 film is investigated. The α-Fe 2 O 3 film was fabricated via a simple spin coating method. The proposed glucose sensor exhibits good selectivity, a fast response time of <5 s, a linear range of 0.05 to 6.0 mM, sensitivity of 17.23 μA mM −1 cm −2 and a detection limit of 0.05 μM. Meanwhile, the excellent performances of the α-Fe 2 O 3 sensor were obtained in reproducibility and the long-term stability under ambient condition. The linear amperometric response of the sensor covers the glucose levels in physiological and clinical for diabetic patients. Therefore, this non-enzyme PEC sensor based on α-Fe 2 O 3 film has a great potential application in the development of glucose sensors.