CO Sensing with Tin Dioxide Sensors; Effect of Fabrication Technologyand Operation Conditions as Revealed by Diffuse Reflectance Infrared Fourier Transformed Spectroscopyand Conductance Measurements
Abstract:In this article a parameter determining the sensitivity and the reaction path of tin dioxide based sensors to CO are thoroughly reviewed. This includes operating temperature range (200–400 °C), interfering gases (water, oxygen), Pd surface doping and its technology (impregnation, colloidal adsorption) and annealing temperature (500 and 700 °C). It can be concluded that commonly observed surface species (alternatively or together) are monodentate carbonates and carboxylates. They are formed in direct reaction with ionosorbed oxygen. Therefore in order to increase the sensitivity to CO (and decrease cross sensitivity towards water) one has to deliver more reactive oxygen species by a proper approach to sensor preparation procedure.
Document Type: Research Article
Publication date: December 1, 2008
More about this publication?
- The growing interest and activity in the field of sensor technologies requires a forum for rapid dissemination of important results: Sensor Letters is that forum. Sensor Letters offers scientists, engineers and medical experts timely, peer-reviewed research on sensor science and technology of the highest quality. Sensor Letters publish original rapid communications, full papers and timely state-of-the-art reviews encompassing the fundamental and applied research on sensor science and technology in all fields of science, engineering, and medicine. Highest priority will be given to short communications reporting important new scientific and technological findings.
- Editorial Board
- Information for Authors
- Subscribe to this Title
- Terms & Conditions
- Ingenta Connect is not responsible for the content or availability of external websites