datum: 9. 12. 2009 středa 14:00
knihovna, budova A

Reactivity and Chemical Reactions of Faceted TiO2 Nanoparticles

Dr. James P.Lewis

Department of Physics,West Virginia University, USA

Although anatase is a less stable crystallographic phase than rutile in bulk titanium dioxide
materials, it has received considerable attention in photoactive materials related applications
due to increased high reactivity in the anatase polymorph . More interestingly, it is reported
that anatase, instead of rutile, becomes the preferable stable phase for TiO2 for particle sizes
less than 14nm. Therefore, an important step in achieving a full understanding of anatase
nanoparticles' photoactive functions with regards to their surface' characteristics is to
examine and determine specific active sites that are available for probing molecules surface
adsorption and dissociation.