Titania based electrochemistry
The features of TiO2 (under illumination) are fully exploited in our lab in the context of photo-electrochemical applications to make horseradish peroxidase based biosensors more environmental friendly by avoiding the direct addition of hydrogen peroxide (H2O2) during the detection of phenolic compounds.
Electrons and holes generated under room light illumination can produce radical species after reaction with water and oxygen. Hydroxyl radical •OH, hydroperoxyl radical •OOH, and superoxide ion radical •O2- are commonly produced reactive species, which participate in the reduction and oxidation reactions and may act as oxidants.
Key publication:
- Amperometric Flow-Injection Analysis of Phenols Induced by Reactive Oxygen Species Generated under Daylight Irradiation of Titania Impregnated with Horseradish Peroxidase, V. Rahemi, St. Trashin, Z. Hafideddine, S. Van Doorslaer, V. Meynen, L. Gorton and K. De Wael, Analytical Chemistry (2020) 92, 3643-3649