Photoluminescence properties of TiO2 nanofibers

Loubna Chetibi, Tetiana Busko, Nikolay Polikarpovich Kulish, Djamel Hamana, Sahrawi Chaib, Slimane Achour*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Multi-walled carbon nanotube (MWCNT)-TiO2 nanofiber (NF) composites forming a layered nanostructure (MWCNTs/TiO2 NFs/Ti) were prepared by impregnation at low temperature. Room temperature photoluminescence (PL) of these nanostructures shows a broad intense band in the visible light range (∼450–600 nm). The origin of the PL emission which, mainly, resulted from surface oxygen vacancies and other defects was investigated. We studied the effect of MWCNT deposition on the PL of TiO2 NFs where the MWCNTs can act as an electron reservoir of electrons emitted from TiO2 nanofibers when irradiated with UV light. The combination of MWCNTs and TiO2 results in quenching of TiO2 luminescence in the visible range. In addition, the prepared surface of MWCNTs-TiO2 was irradiated with Ti+ ions using irradiation energy of 140 keV and doses of 1013 ions/cm2. Also, this treatment induced the PL intensity quenching due to the generation of non-radiative additional levels inside the band gap. [Figure not available: see fulltext.]

Original languageEnglish (US)
Article number129
JournalJournal of Nanoparticle Research
Volume19
Issue number4
DOIs
StatePublished - Apr 1 2017

Keywords

  • Irradiation
  • MWCNTs
  • Photoluminescence
  • Recombination
  • TiO nanofibers

ASJC Scopus subject areas

  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • Chemistry(all)
  • Modeling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics

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