Band gap evaluations of metal-inserted titania nanomaterials Academic Article uri icon

abstract

  • The electronic and crystalline properties of iron-inserted titania (Fe x Ti 1-x O 2 ) nanoparticles were measured using synchrotron-based soft X-ray spectroscopy and high-temperature X-ray powder diffraction (HT-XRD). The data from X-ray absorption and emission spectroscopy were used to examine occupied and unoccupied densities of states for O 2p and Ti/Fe 3d hybrid orbital characteristics. It was found that Fe 3+ insertion resulted in an up-shift of the band gap from 3.20 to 3.46 eV. This observation reflected site occupancy in the TiO 2 lattice by Fe dopant ions. From HT-XRD Rietveld analysis, Ti occupancy was found to be 0.92 and oxygen 1.00. In addition, the crystal structure remained anatase within a temperature range of 25-800 C, while the lattice distortion increased due to thermal expansion. 2013 Springer Science+Business Media Dordrecht.

published proceedings

  • JOURNAL OF NANOPARTICLE RESEARCH

author list (cited authors)

  • Bashir, S., Liu, J., Zhang, H., Sun, X., & Guo, J.

citation count

  • 6

complete list of authors

  • Bashir, Sajid||Liu, Jingbo||Zhang, Hui||Sun, Xuhui||Guo, Jinghua

publication date

  • April 2013