Electronic structure of N doped TiO$_{2}$: Hard x-ray photoemission study

ORAL

Abstract

We have determined the electronic structure of N doped TiO$_{2}$ using a combination of synchrotron based hard x-ray photoemission spectroscopy (HAXPES) and first principle density functional theory calculations. Comparison with calculations and experiment reveals strong evidence of hybridization between different orbital components. Our results reveal that N doping of TiO$_2$ leads to the formation of oxygen vacancies and the combination of both N impurity and oxygen vacancies accounts for the observed visible light catalytic behavior of Ndoped TiO$_2$.

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Authors

  • Abdul Rumaiz

    National Synchrotron Light Source, Brookhaven National Laboratory

  • Joseph Woicik

    National Institute of Standards and Technology

  • Eric Cockayne

    National Institute of Standards and Technology

  • Hong Lin

    Dept of Materials Science and Egineering, University of Delaware

  • Ghulam Jaffari

    Department of Physics and Astronomy, University of Delaware, Newark DE 19716, Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA, Dept. of Physics and Astronomy, University of Delaware

  • Syed Shah

    Department of Material Science and Engineering; Department of Physics and Astronomy, Univeristy of Delaware, Newark, DE 19716, USA,, Dept of Materials Science and Egineering, University of Delaware, Materails Science and Engineering, University of Delaware