3.1.3 - Photolysis for Enhancing the Specificity of NOₓ Electrochemical Sensors
- Event
- EUROSENSORS 2026
2026-09-06 - 2026-09-09
Zurich - Band
- Lectures
- Chapter
- Chemical Sensors
- Author(s)
- R. F. Wolffenbuttel - Delft University of Technology,Delft (The Netherlands), D. Bilby, J. H. Visser - Ford Motor Company,Dearborn (USA)
- Pages
- 106 - 107
- DOI
- 10.5162/eurosensors2026/3.1.3
- ISBN
- 978-3-910600-12-6
- Price
- free
Abstract
Operation of the electrochemical NOx gas sensor lacks specificity between NO and NO 2 detection. Radiation of a NO X -containing exhaust gas mixture by UV light of 370 nm wavelength is investigated for photodecomposition of NO 2 into NO and atomic oxygen. The objective is to achieve sufficient modulation of the NO/NO 2 composition for significantly improving specificity of a commercially available sensor in a dynamic operating mode. A sufficient photolysis conversion efficiency is demonstrated using a 10⁰ sccm flow in a quartz tube and commercially available LEDs for enabling NO/NO 2 selective detection.