A study on the structure and thermal stability of titanate nanotubes as a function of sodium content

TiTanate NanoTubes (TTNT) were synthesized by hydrothermal treatment of TiO2 anatase in 10 M NaOH at 120 °C followed by repeated water washing, with and without ion exchanging by HCl 0.1 M. Samples with different contents of remnant sodium in nanotubes were characterized, as synthesized and after heat-treatment, by X-ray diffraction, transmission electron microscopy, thermal analysis and N2 adsorption. It was demonstrated that TTNT consisted of a trititanate structure with general formula NaxH2−xTi3O7⋅nH2O, where 0

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