Structural characterization and effect of dehydration on the Ni-doped titanate nanotubes

Dong Hyun Kim, Jum Suk Jang, Nam Hoon Goo, Min Serk Kwon, Jin Woo Lee, Sun Hee Choi, Dong Wook Shin, Sun Jae Kim, Kyung Sub Lee

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Abstract

Titanate nanotubes and Ni-doped titanate nanotubes were synthesized by hydrothermal method and simple firing using rutile powders as starting materials. The hydrogen absorption of the nanotubes was investigated by the conventional volumetric pressure-composition (P-C) isothermal method using an automated Sivert's type apparatus. The microstructure and morphology of the synthesized nanotubes were characterized by X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM). Titanate nanotubes compose of H2Ti2O5·H2O in accordance with DFT (Density Functional Theory) calculation and has outer and inner diameter of ∼10 and 6 nm, and the interlayer spacing about 0.65-0.74 nm. The storage capacity of hydrogen in the Ni-doped nanotubes increased linearly with pressure and revealed reliable evidence of hydrogen sorption at room temperatures.

Original languageEnglish
Pages (from-to)230-233
Number of pages4
JournalCatalysis Today
Volume146
Issue number1-2
DOIs
Publication statusPublished - 2009 Aug 15

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Keywords

  • Hydrogen storage
  • Hydrothermal method
  • Ni dopant
  • Titanate nanotubes
  • XFAS

Cite this

Kim, D. H., Jang, J. S., Goo, N. H., Kwon, M. S., Lee, J. W., Choi, S. H., ... Lee, K. S. (2009). Structural characterization and effect of dehydration on the Ni-doped titanate nanotubes. Catalysis Today, 146(1-2), 230-233. https://doi.org/10.1016/j.cattod.2009.04.007