Photoluminescence Enhancement of Titanate Nanotubes by Insertion of Rare Earth Ions in Their Interlayer Spaces. (25th January 2017)

• Record Type: Journal Article
• Authors: Marques, Thalles M. F.; Luz-Lima, Cleanio; Sacilloti, Marco; Fujisawa, Kazunori; Perea-Lopez, Nestor; Terrones, Mauricio; Silva, Eder Nascimento; Ferreira, Odair Pastor; Viana, Bartolomeu Cruz
• Other Names: Bongiovanni Giovanni Academic Editor.
• Is Part Of: Journal of nanomaterials. Volume 2017(2017)
• Publication Date: 2017-01-25
• Subjects: Nanostructured materials -- Periodicals; Nanotechnology -- Periodicals; Nanomatériaux; Nanostructured materials; Nanotechnology; Nanostructures; Nanotechnology; Periodicals; Fulltext; Internet Resources; Periodicals; 620.115
• DOI: 10.1155/2017/3809807
• Languages: English
• ISSNs: 1687-4110

Abstract

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: Pr 3+, Er 3+, Nd 3+, and Yb 3+ ). 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.