Photocatalytic Reduction of Carbon Dioxide in Aqueous Suspensions of a Titania Semiconductor

The photocatalytic reduction reactions of CO2 in aqueous suspensions of titanium dioxide (TiO2) semiconductor with photodeposited Pt and Cu cocatalysts have been studied. It has been found that the composition and amount of CO2 reduction products significantly depend on the nature of the cocatalyst supported onto TiO2. A mechanism for the formation of CO2 reduction products has been proposed.