The surface structure of TiO2 nanoparticles influences photocatalytic properties
What is it about?
Titanium dioxide nanomaterials are very important for technological applications but the structure of TiO2 facets is still unknown at the molecular level. Here we obtain this key information by elucidating the behaviour and reactivity of carbon monoxide and hydrogen peroxide on different types of TiO2 nanoparticles.
Why is it important?
We showed that TiO2 anatase nanoparticles with truncated bipyramidal shape can be usefully employed as a model system for the investigation of the IR spectra of adsorbed carbon monoxide. This allows for an unambiguous assignment of the bands of CO in the much more difficult case of the widespread titania catalyst TiO2-P25, which is in form of nanopowders. Additionally, for the first time we uncovered the role of thermal and chemical disorder in determining the stretching frequency of adsorbed probe molecules.
The following have contributed to this page: Gloria Tabacchi