Photoluminescence of samarium-doped TiO2 nanotubes

Dong Jin Park, Tohru Sekino, Satoshi Tsukuda, Asuka Hayashi, Takafumi Kusunose, Shun Ichiro Tanaka

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

Samarium (Sm)-modified TiO2 nanotubes (TNTs) were synthesized by low-temperature soft chemical processing. X-ray powder diffraction analyses of the synthesized Sm-doped and non-doped TNTs show a broad peak near 2θ=10°, which is typical of TNTs. The binding energy of Sm 3d5/2 for 10 mol% Sm-doped TNT (1088.3 eV) was chemically shifted from that of Sm2O3 (1087.5 eV), showing that Sm existed in the TiO2 lattice. Sm-doped TNTs clearly exhibited red fluorescence, corresponding to the doped Sm3 ion in the TNT lattice. The Sm-doped TNT excitation spectrum exhibited a broad curve, which was similar to the UVvis optical absorption spectrum. Thus, it was considered that the photoluminescence emission of Sm3-doped TNT with UV-light irradiation was caused by the energy transfer from the TNT matrix via the band-to-band excitation of TiO2 to the Sm3 ion.

Original languageEnglish
Pages (from-to)2695-2700
Number of pages6
JournalJournal of Solid State Chemistry
Volume184
Issue number10
DOIs
Publication statusPublished - 2011 Oct

Keywords

  • Doping
  • Energy transfer
  • Photoluminescence
  • Rare earth
  • Soft chemical method
  • Titania nanotube

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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