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      Surface ionic states and structure of titanate nanotubes

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      Author(s)
      Vempati S.
      Kayaci-Senirmak, F.
      Ozgit Akgun, C.
      Bıyıklı, Necmi
      Uyar, Tamer
      Date
      2015
      Source Title
      RSC Advances
      Print ISSN
      2046-2069
      Publisher
      Royal Society of Chemistry
      Volume
      5
      Issue
      101
      Pages
      82977 - 82982
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      Here we present an investigation on Zn-Ti-O ternary (zinc titanate) nanostructures which were prepared by a combination of electrospinning and atomic layer deposition. Depending on the ZnO and TiO2 molar ratio, two titanates and one mix phased compound were synthesized by varying the post-annealing temperatures. Specifically Zn2TiO4, ZnTiO3 and ZnO/TiO2 nanostructures were fabricated via thermal treatments (900, 700, 800 °C, respectively). Structural studies unveiled the titanate phase of the nanostructures. Furthermore, the ionic states of the titanate nanostructures on the surface are revealed to be Ti3+ and Zn2+. Spin-orbit splitting of Zn2p and Ti2p doublets were, however, not identical for all titanates which vary from 23.09-23.10 eV and 5.67-5.69 eV respectively. Oxygen vacancies were found on the surface of all titanates. The valance band region was analyzed for Zn3d, Ti3p, O2s and O2p and their hybridization, while the edge (below Fermi level) was determined to be at 2.14 eV, 2.00 eV and 1.99 eV for Zn2TiO4, ZnTiO3 and ZnO/TiO2 respectively.
      Keywords
      Annealing
      Atomic layer deposition
      Nanostructures
      Oxygen vacancies
      Yarn
      Zinc
      Zinc oxide
      Ionic state
      Molar ratio
      Post-annealing temperature
      Spin-orbit splittings
      Structural studies
      Titanate nanotubes
      Valance bands
      Zinc titanate
      Titanium compounds
      Permalink
      http://hdl.handle.net/11693/20970
      Published Version (Please cite this version)
      http://dx.doi.org/10.1039/c5ra14323c
      Collections
      • Institute of Materials Science and Nanotechnology (UNAM) 1930
      • Nanotechnology Research Center (NANOTAM) 1063
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