Title of article :
The influence of surface properties on the photocatalytic activity of nanostructured TiO2
Author/Authors :
King Lun Yeung، نويسنده , , Sze Tai Yau، نويسنده , , A.Javier Maira، نويسنده , , Juan M. Coronado، نويسنده , , Javier Soria، نويسنده , , Po Lock Yue، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2003
Abstract :
Nanostructured TiO2 with 11- (P11) and 5-nm (P5) crystal sizes were prepared by a modified sol–gel method. Controlled crystallization and a pretreatment process were employed to obtain TiO2 with different surface roughness and degree of hydroxylation, while maintaining an identical crystal (i.e., 11 or 5 nm) and aggregate (i.e., 100 nm) sizes, phase structure (i.e., anatase), and crystallinity (i.e., X-ray diffraction peak intensity). Using the photooxidation of airborne trichloroethylene as a probe reaction, we were able to identify that the hydroxyl groups on low-coordinated titanium atoms are responsible for the generation of dichloroethylene and dichloroacetaldehyde by-products. Their presence usually means lower TCE conversion and in some cases leads to catalyst deactivation.
Keywords :
mordenite , Effect of platinum , Effect of hydrogen , Monomolecular , Bimolecular mechanism , Bifunctional catalyst , n-Pentane isomerization , Heteropolyacids , Sulfated zirconia
Journal title :
Journal of Catalysis
Journal title :
Journal of Catalysis