Isolated TiOx sites on silica have been demonstrated to be active photocatalysts. Methanol and methane are obtained in the photocatalytic reduction of CO2, however, overall activities are low. In this contribution we will present a route for synthesizing photocatalysts with improved properties by adding ZnO and Au to TiOx/SBA-15. Isolated ZnO species are deposited on TiOx/SBA-15 by anhydrous grafting and gold nanoparticles are formed on the catalyst surface by means of photodeposition. The obtained catalysts were characterized by X-ray absorption (XANES, EXAFS), Raman and UV-Vis spectroscopy to evaluate the structure of the transition metal species on the surface.The addition of ZnO increased the amount of adsorbed CO2 on the catalysts. Au/ZnO/TiOx/SBA-15 showed an improved overall photocatalytic performance in test reactions.

Synthesis of photocatalysts containing isolated TiO<sub>x</sub> and ZnO species in SBA-15 for CO<sub>2</sub> reduction

243rd National Meeting (2012)

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Synthesis of photocatalysts containing isolated TiOx and ZnO species in SBA-15 for CO2 reduction

Synthesis of photocatalysts containing isolated TiO_x and ZnO species in SBA-15 for CO₂ reduction