scholarly journals Interaction of sodium titanate nanotubes with organic acids and base: chemical, structural and morphological stabilities

2010 ◽  
Vol 21 (7) ◽  
pp. 1341-1348 ◽  
Author(s):  
Carolina M. Rodrigues ◽  
Odair P. Ferreira ◽  
Oswaldo L. Alves
Keyword(s):  
Organic Acids ◽  
Sodium Titanate ◽  
Titanate Nanotubes

Electrochemistry of sodium titanate nanotubes as a negative electrode for sodium-ion batteries

2020 ◽  
Vol 331 ◽  
pp. 135422 ◽  
Author(s):  
Marina M. Leite ◽  
Vitor L. Martins ◽  
Flavio M. Vichi ◽  
Roberto M. Torresi
Keyword(s):  
Negative Electrode ◽  
Sodium Titanate ◽  
Sodium Ion ◽  
Titanate Nanotubes ◽  
Sodium Ion Batteries

Synthesis of silane functionalized sodium titanate nanotubes and their influence on thermal and mechanical properties of epoxy nanocomposite

2013 ◽  
Vol 210 (11) ◽  
pp. 2284-2291 ◽  
Author(s):  
Ivan Brnardić ◽  
Miroslav Huskić ◽  
Polona Umek ◽  
Alberto Fina ◽  
Tamara Holjevac Grgurić
Keyword(s):  
Mechanical Properties ◽  
Sodium Titanate ◽  
Titanate Nanotubes ◽  
Thermal And Mechanical Properties ◽  
Epoxy Nanocomposite

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

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Thalles M. F. Marques ◽  
Cleanio Luz-Lima ◽  
Marco Sacilloti ◽  
Kazunori Fujisawa ◽  
Nestor Perea-Lopez ◽  
...  
Keyword(s):  
Optical Properties ◽  
Rare Earth ◽  
Strong Dependence ◽  
Sodium Titanate ◽  
Rare Earth Ions ◽  
Titanate Nanotubes ◽  
Visible Range ◽  
Exchange Reactions ◽  
X Ray ◽  
Transmission Electron

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.

UV-A and Simulated Sunlight Photo-activity of TiO2 Nanoparticles Formed from Titanate Nanotubes

2010 ◽  
Vol 63 (2) ◽  
pp. 293 ◽  
Author(s):  
Jeffrey S. Church ◽  
Keith Fincher ◽  
Xingdong Wang
Keyword(s):  
Methyl Orange ◽  
Sodium Titanate ◽  
Sodium Content ◽  
Titanate Nanotubes ◽  
Sodium Ions ◽  
Hydrogen Ions ◽  
Simulated Sunlight ◽  
Photo Oxidation ◽  
Highly Active ◽  
Low Sodium

Sodium titanate nanotubes were prepared hydrothermally and sodium ions were exchanged for hydrogen ions by washing with water and further treatment with HCl. No anatase or rutile was produced during the exchange. Photo-catalysts were prepared by calcination and their activity was compared in UV-A and simulated sunlight by bleaching methyl orange, which does not adsorb onto the catalyst’s surface. Only photo-catalysts with low sodium content were capable of bleaching the dye. More photo-oxidation occurred in simulated sunlight suggesting that the dye is absorbing visible light and transferring this energy to the TiO2. The preparation of highly active photo-catalysts from sodium titanate nanotubes may well depend on optimizing their preparation to minimize sodium content without the formation of rutile.

Electrochemical lithium storage of sodium titanate nanotubes and nanorods

2008 ◽  
Vol 53 (24) ◽  
pp. 7061-7068 ◽  
Author(s):  
H. Zhang ◽  
X.P. Gao ◽  
G.R. Li ◽  
T.Y. Yan ◽  
H.Y. Zhu
Keyword(s):  
Sodium Titanate ◽  
Titanate Nanotubes ◽  
Lithium Storage

scholarly journals Synthesis and Cathodoluminescence of Undoped and Cr3+-Doped Sodium Titanate Nanotubes and Nanoribbons

2010 ◽  
Vol 114 (18) ◽  
pp. 8192-8198 ◽  
Author(s):  
Carlos Díaz-Guerra ◽  
Polona Umek ◽  
Alexandre Gloter ◽  
Javier Piqueras
Keyword(s):  
Sodium Titanate ◽  
Titanate Nanotubes

scholarly journals Towards atomic resolution in sodium titanate nanotubes using near-edge X-ray-absorption fine-structure spectromicroscopy combined with multichannel multiple-scattering calculations

2012 ◽  
Vol 3 ◽  
pp. 789-797 ◽  
Author(s):  
Carla Bittencourt ◽  
Peter Krüger ◽  
Maureen J Lagos ◽  
Xiaoxing Ke ◽  
Gustaaf Van Tendeloo ◽  
...  
Keyword(s):  
Fine Structure ◽  
Multiple Scattering ◽  
Spatial Resolution ◽  
Sodium Titanate ◽  
Titanate Nanotubes ◽  
Theoretical Modelling ◽  
Hydroxyl Groups ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

Recent advances in near-edge X-ray-absorption fine-structure spectroscopy coupled with transmission X-ray microscopy (NEXAFS–TXM) allow large-area mapping investigations of individual nano-objects with spectral resolution up to E/ΔE = 104 and spatial resolution approaching 10 nm. While the state-of-the-art spatial resolution of X-ray microscopy is limited by nanostructuring process constrains of the objective zone plate, we show here that it is possible to overcome this through close coupling with high-level theoretical modelling. Taking the example of isolated bundles of hydrothermally prepared sodium titanate nanotubes ((Na,H)TiNTs) we are able to unravel the complex nanoscale structure from the NEXAFS–TXM data using multichannel multiple-scattering calculations, to the extent of being able to associate specific spectral features in the O K-edge and Ti L-edge with oxygen atoms in distinct sites within the lattice. These can even be distinguished from the contribution of different hydroxyl groups to the electronic structure of the (Na,H)TiNTs.

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