A fully oxidized V2O5/TiO2(0Â 0Â 1)-anatase system studied with in situ synchrotron photoelectron spectroscopy

A V2O5/TiO2(0 0 1)-anatase system was prepared with reactive DC magnetron sputtering upon a mineral TiO2(0 0 1)-anatase single crystal substrate. The vanadium oxide layer was grown in steps of 2 Å up to 30 Å and studied with in situ synchrotron ultraviolet photoemission spectroscopy (hν = 150 eV). From the V3p and valence band spectra it is shown that fully oxidized vanadium oxide layers are deposited for all layer thicknesses. The sputtered V2O5 layers are sensitive to photoreduction under irradiation with the monochromatic synchrotron beam.