Photodecomposition of Acetone on ZrOx-TiO2 Thin Films in O2 Excess and Deficit Conditions

Oxygen Diffusion and Photon-Induced Decomposition of Acetone on Zr- and Nb-Doped TiO2 Nanoparticles

“…Structural, optical, and chemical properties of the synthesized materials were characterized by a range of different techniques as described elsewhere. , Phase analysis was made by the powder X-ray diffraction patterns obtained with a Guiner-Hägg focusing camera, using Cu Kα 1 radiation and Si as internal standard. Scanning electron microscope (SEM) images were obtained with a FEG-SEM Leo 1550 Gemini instrument.…”

“…Detailed knowledge of diffusion properties is of utmost importance in many technical applications, including ceramic processing, solid oxide fuel cells, mineral dissolution and corrosion, and gas sensors . In the search for new photocatalytic active materials, which have improved visible light photon-conversion efficiency, cation-doped TiO 2 and binary metal oxides with TiO 2 have been suggested. , Among these materials Nb and Zr doping have recently attracted some attention. − It is hitherto not shown whether these structural modifications result in significant changes of diffusion processes. The latter may be augmented by photon-assisted diffusion processes occurring in photocatalytic applications.…”

Fourier-Transform Infrared and Raman Spectroscopy of Pure and Doped TiO2 Photocatalysts

“…Even though many studies employing cation doping strategies to achieve enhanced UV-visible photocatalytic activity turn out to be unsuccessful, and may be related to fundamental problems associated with defect formation [166], there may be unexpected benefits associated with structural stabilization of the photocatalyst, as shown by Ö sterlund et al [186]. In this study it was shown that Zr-doped TiO 2 films exhibit an exceptionally stable activity over time and usage; much better than the pure TiO 2 films.…”