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Formation, Structure and Stability of Titanate Nanotubes and Their Proton Conductivity

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Author(s)

A Thorne, Angela Kruth, David Prestwich Tunstall, John Thomas Sirr Irvine, Wuzong Zhou

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Abstract

High-yield H-form trititanate nanotubes have been synthesized, and their structures have been characterized by using X-ray diffraction and high-resolution transmission electron microscopy. According to combined TGA/XRD studies, the nanotubes are not stable at high temperature. Thermal analysis suggests that the stoichiometry of the material is H(2)Ti(3)O(7)center dot 0.8H(2)O(abs). Conductivity measurements indicate that mainly protonic transport occurs at temperatures below 150 degrees C and that with increasing temperature and progressive breakdown of nanotubes and formation of crystalline TiO2 phases protonic conductivity is lost, leaving only residual defect electronic conduction. The proton conductivity is ca. 5.5 x 10(-6) S cm(-1) at 300 K. The structural protons and trapped water were confirmed by solid-state NMR.

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Original languageEnglish
Pages (from-to)5439-5444
Number of pages6
JournalJournal of Physical Chemistry B
Volume109
Issue number12
DOIs
Publication statusPublished - 31 Mar 2005

    Research areas

  • LAYERED TITANATES, OXIDE NANOTUBES, NA2TI3O7

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