Structural effects on the adsorption of alcohols on titanium dioxides
Abstract
The infrared spectra of methanol, isopropanol and t-butanol adsorbed on TiO2 anatase and rutile are reported and discussed. The irreversible adsorption at room temperature is completely dissociative in all cases on rutile, while undissociatively coordinated molecules are also formed together with alkoxide groups on anatase. This shows the presence on the anatase surface of particular sites whose presence might explain the different behaviour in some surface phenomena reported in the literature of the two crystal modifications.