Photoluminescence Enhancement of Titanate Nanotubes by Insertion of Rare Earth Ions in Their Interlayer Spaces

Thalles M.F. Marques, Cleanio Luz-Lima, Marco Sacilloti, Kazunori Fujisawa, Nestor Perea-Lopez, Mauricio Terrones, Eder Nascimento Silva, Odair Pastor Ferreira, Bartolomeu Cruz Viana

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Abstract

The optical properties of titanate nanotubes (TiNts) intercalated with rare earths (RE) ions were intensively investigated in this study. To prepare the nanomaterials, sodium titanate nanotubes (Na-TiNts) were submitted to ion exchange reactions with different rare earth elements (RE: Pr3+, Er3+, Nd3+, and Yb3+). To the best of our knowledge, it is the first time that these RE-TiNts were synthesized. All samples were characterized by Raman spectroscopy, X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and energy dispersive X-ray spectroscopy (EDS). Furthermore, the optical properties were examined using photoluminescence spectroscopy (PL) and UV-Vis-NIR absorption spectroscopy. The PL intensity (visible range) of the RE-TiNt samples showed a strong dependence when the temperature was decreased down to 20 K. This PL enhancement probably was promoted by electronic modifications in titanate layer band gap and/or interface charge transfers due to RE ions intercalation.

Original languageEnglish (US)
Article number3809807
JournalJournal of Nanomaterials
Volume2017
DOIs
StatePublished - Jan 1 2017

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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    Marques, T. M. F., Luz-Lima, C., Sacilloti, M., Fujisawa, K., Perea-Lopez, N., Terrones, M., Silva, E. N., Ferreira, O. P., & Viana, B. C. (2017). Photoluminescence Enhancement of Titanate Nanotubes by Insertion of Rare Earth Ions in Their Interlayer Spaces. Journal of Nanomaterials, 2017, [3809807]. https://doi.org/10.1155/2017/3809807