3 p fi 3 d resonant photoemission spectroscopy of a TiO 2 sub - monolayer grown on Al 2 O 3 M . S anchez - Agudo
نویسندگان
چکیده
The valence band resonant photoemission spectra of a TiO2 sub-monolayer grown on an Al2O3 substrate have been measured throughout the Ti 3p absorption edge, i.e. at photon energies between 40 and 60 eV. The resonance process has been analysed in terms of constant initial state (CIS) curves, showing a peak at 49.5 eV photon energy, corresponding to a Fano-like resonant process. The Ti 3d contribution to the valence band shows a significant energy shift with respect to bulk TiO2. These results are compared to cluster model calculations for a TiO6 cluster. 2004 Elsevier B.V. All rights reserved.
منابع مشابه
SäferTEX: Source Code Esthetics for Automated Typesetting
( * ) I n t r o d u c t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i n t r o . s t ( * * ) S e n s e a n d N o n s e n s e o f E x a m p l e s . . . . . . . . . . n o n s e n s e . s t ( * * ) E x p l a n a t i o n s w / o e x a m p l e s . . . . . . . . . . . . . . . e x p l a n a t i o n . s t ( * ) E x a m p l e s i n D a i l y P r a c t i s . . . . . . . . . . . . . . ....
متن کاملSize and support effects for the water-gas shift catalysis over gold nanoparticles supported on model Al2O3 and TiO2.
The water-gas shift (WGS) reaction rate per total mole of Au under 7% CO, 8.5% CO(2), 22% H(2)O, and 37% H(2) at 1 atm for Au/Al(2)O(3) catalysts at 180 °C and Au/TiO(2) catalysts at 120 °C varies with the number average Au particle size (d) as d(-2.2±0.2) and d(-2.7±0.1), respectively. The use of nonporous and crystalline, model Al(2)O(3) and TiO(2) supports allowed the imaging of the active c...
متن کاملUltrathin, ordered oxide films on metal surfaces.
Metal oxides and oxide thin films are extensively used as active catalysts and catalytic supports, as well as in many other important technical applications. Unlike TiO(2), which is a semiconductor and can be investigated using a variety of surface science techniques, most metal oxides are insulators, which seriously restricts their use as model surfaces with modern surface science techniques. ...
متن کاملGrowth of CNTs over Fe–Co/Nanometric TiO2 Catalyst by CVD: The Effects of Catalyst Composition and Growth Temperature
In this research carbon nanotubes were produced by chemical vapor deposition of acetylene over a mixture of iron and cobalt catalysts supported on nanometric TiO2 and the influences of two synthesis parameters: growth temperature and catalyst composition ratio on properties of end-product carbon nanotubes were investigated. The catalytic basis was prepared by wet impregnation ...
متن کاملDetecting compressive strain by evaluation of Raman spectroscopy of the multiwall Carbon nanotubes/TiO2 nanocomposites
Functionalized Multi-walled carbon nanotubes (f-MWCNTs) which are modified using nitric acid and sulfuric acid were evaluated to synthesize a uniform nanocomposite via application of TiO2. The f-MWCNTs-TiO2 nanocomposites have been produced via using the chemical simple two-step method. To characterize the structural analysis, scanning electron microscopy...
متن کامل