3 years ago

Ambient Humidity Influence on CO Detection with SnO2 Gas Sensing Materials. A Combined DRIFTS/DFT Investigation

Ambient Humidity Influence on CO Detection with SnO2 Gas Sensing Materials. A Combined DRIFTS/DFT Investigation
Nicolae Barsan, Udo Weimar, Mathilde Guiltat, Anne Hémeryck, Susanne Wicker
Diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and first-principles calculations are performed to investigate the different ways in which water reacts with a SnO2 surface and to evaluate the cross-interference of humidity on the detection of CO. Two different materials, chosen because of their very different properties, are investigated. The experimental results are interpreted with the help of theoretical modeling of two clean and defective surfaces, namely, (110) and (101). The experimental results show, and the theoretical calculations confirm, that water vapor can interfere with the CO detection in different ways depending on the active surface and the concentration of oxygen vacancies. This is related to the different ways in which the water vapor reacts with tin oxide: on the one hand, it can reduce the (101) surface; on the other hand, it can heal the oxygen vacancies of the defective (110) surface.

Publisher URL: http://dx.doi.org/10.1021/acs.jpcc.7b06253

DOI: 10.1021/acs.jpcc.7b06253

You might also like
Never Miss Important Research

Researcher is an app designed by academics, for academics. Create a personalised feed in two minutes.
Choose from over 15,000 academics journals covering ten research areas then let Researcher deliver you papers tailored to your interests each day.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.