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Title in Portuguese: Photoluminescence enhancement of titanate nanotubes by insertion of rare earth ions in their interlayer spaces
Author: Marques, Thalles Moura Fé
Lima, Cleânio da Luz
Sacilloti, Marco Antonio
Fujisawa, Kazunori
Perea Lopez, Nestor
Terrones, Mauricio
Silva, Eder Nascimento
Ferreira, Odair Pastor
Viana Neto, Bartolomeu Cruz
Keywords: Nanotubos de titanato
Difração de raios-X
Metais de terra rara
Issue Date: 2017
Publisher: Journal of Nanomaterials
Citation: MARQUES, T. M. F.; LIMA, C. L.; SACILLOTI, M. A.; FUJISAWA, K.; PEREA LOPES, N.; TERRONES, M.; SILVA, E. N.; FERREIRA, O. P.; VIANA NETO, B. C. Photoluminescence enhancement of titanate nanotubes by insertion of rare earth ions in their interlayer spaces. Journal of Nanomaterials, London, v. 2017, p. 1-10, 2017.
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.
metadata.dc.type: Artigo de Periódico
ISSN: 1687-4110 (impresso)
1687-4129 (online)
Appears in Collections:DFI - Artigos publicados em revista científica

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