title: Shape-controlled TiO2 nanoparticles and TiO2 P25 interacting with CO and H2O2 molecular probes: a synergic approach for surface structure recognition and physico-chemical understanding.
abstract: Integrated studies of CO on truncated bipyramidal TiO(2) anatase nanoparticles mainly exposing smooth (101) surfaces provide the missing link between TiO(2) single crystals and commercial TiO(2) nanopowders with complex morphology. The synergy among high resolution transmission electron microscopy, IR spectroscopy and modeling correlates adsorbed CO stretching frequency to anatase surface types, and reveals how disorder of the adsorbed CO layer affects CO/TiO(2) IR bands. Comparison of the two TiO(2) nanoparticle types highlights the role of low coordination Ti(4+) sites selectively present on TiO(2) P25 in the photocatalytic decomposition of H(2)O(2), an important Reactive Oxygen Species (ROS) formed in photocatalytic processes.
authors.affiliation: Department of Chemistry and Interdepartmental Centre of Excellence Nanostructured Interfaces and Surfaces-NIS, University of Torino, via P. Giuria 7, 10125 Torino, Italy.
authors.forename: Chiara
authors.initials: C
authors.lastname: Deiana
authors.forename: Marco
authors.initials: M
authors.lastname: Minella
authors.forename: Gloria
authors.initials: G
authors.lastname: Tabacchi
authors.forename: Valter
authors.initials: V
authors.lastname: Maurino
authors.forename: Ettore
authors.initials: E
authors.lastname: Fois
authors.forename: Gianmario
authors.initials: G
authors.lastname: Martra