Probing photochemical transformations at TiO{sub 2}/Pt and TiO{sub 2}/Ir interfaces using x-ray absorption spectroscopy

Journal Article · Sun May 28 00:00:00 EDT 2006 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.2198193· OSTI ID:20783293

Lahiri, Debdutta; Subramanian, V; Bunker, Bruce A; Kamat, Prashant V ^[1]

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1. Synchrotron Radiation Section, Physics Group, Bhabha Atomic Research Centre, Mumbai 400085 (India)

Structural transformations at the TiO{sub 2}/Pt and TiO{sub 2}/Ir interfaces during UV-irradiation have been probed by X-ray absorption spectroscopy. Oxidation by the photogenerated holes results in the intercalation of Pt and Ir into the Titania matrix. The structural transformations observed with Pt and Ir nanoparticles anchored on TiO{sub 2} is different than the clustering of gold atoms observed in the TiO{sub 2}/Au system. Implications of such structural transformations on the photocatalytic activity of semiconductor photocatalyts are discussed.

• OSTI ID: 20783293
• Journal Information: Journal of Chemical Physics, Vol. 124, Issue 20; Other Information: DOI: 10.1063/1.2198193; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ABSORPTION SPECTROSCOPY
COMPOSITE MATERIALS
GOLD
INTERFACES
IRIDIUM
IRRADIATION
NANOSTRUCTURES
OXIDATION
PHOTOCHEMISTRY
PLATINUM
SEMICONDUCTOR MATERIALS
TITANIUM OXIDES
ULTRAVIOLET RADIATION
X-RAY SPECTRA
X-RAY SPECTROSCOPY