Comparison of Photocatalytic Performance of Degussa TiO2 P25 and P90 in Gas Phase Photocatalytic Reactor

Abstract

Photocatalytic performances of Degussa TiO₂ P25, one of the most active commercial photocatalysts and P90, recently developed material by Degussa, were studied using gas phase photocatalytic reactor. Photodecomposition of methyl tert-butyl ether was used to characterize photocatalytic behaviour of two samples containing different ratio of TiO₂ anatase and rutile. This is the first demonstration that although the activity of P90 was higher than that of P25 TiO₂, the surface area normalized activity showed that P25 had a better performance.