Love wave device for real-time monitoring of pollutant degradation through photocatalysis

Laurianne Blanc (1) , Angélique Tetelin (1) , Cédric Boissière (2) , Corinne Dejous (1) , Dominique Rebière (1)

1 IMS - Laboratoire de l'intégration, du matériau au système
2 LCMCP (site Paris VI) - Laboratoire de Chimie de la Matière Condensée de Paris (site Paris VI)

A mesoporous titania-coated Love wave sensor is used to monitor the real-time degradation of stearic acid through a photocatalytic reaction. The pollutant is deposited directly on the porous film. It leads, at first, to a decrease of the resonant frequency. Then, the device is placed under UV light and its frequency response is real-time monitored. After 12 hours under exposure, the frequency successfully reached its initial value. Acoustic sensors present many advantages compared to conventional measurement systems for photocatalytic activity: real-time response, small size, and low cost. The Love wave devices could allow to monitoring the degradation kinetics of other pollutants. They could also be a useful tool to study the influence of the UV wavelength on the degradation rate.

Domaines: Micro et nanotechnologies/Microélectronique

Laurianne Blanc, Angélique Tetelin, Cédric Boissière, Corinne Dejous, Dominique Rebière. Love wave device for real-time monitoring of pollutant degradation through photocatalysis. 14th International Meeting on Chemical Sensors (IMCS 2012), May 2012, Nürnberg, Germany. pp.927-929, ⟨10.5162/IMCS2012/P1.2.13⟩. ⟨hal-00677383⟩