Fe-doped trititanate nanotubes: Formation, optical and magnetic properties, and catalytic applications

Wei Qiang Han, Wen Wen, Ding Yi, Zhenxian Liu, Mathew M. Maye, Laura Lewis, Jonathan Hanson, Oleg Gang

Research output: Contribution to journalArticle

31 Scopus citations

Abstract

We have synthesized crystalline Fe-doped trititanate nanotubes via a wet-chemistry method. The products were characterized by high-resolution transmission electron microscopy (TEM), energy-dispersive X-ray spectrometry (EDS), in-situ X-ray diffraction (XRD), ultraviolet-visible spectrophotometry (UV-vis), synchrotron infrared (IR) spectroscopy, and temperature-dependent magnetometry. The Fe-doped trititanate nanotubes are about 8 nm in diameter and up to 1 μm long. EDS revealed that the Fe-doping ratio is about 0.5%, while IR and UV-vis spectra reveal the effects of doping. In-situ XRD experiments demonstrate the transformation of the trititanate to titania phase under a reductive atmosphere. The Fe-doped trititanate nanotubes exhibited noticeable catalytic activity in the water-gas-shift reaction. Magnetic measurements indicate that the Fe-doped trititanate nanotubes comprise a mixture of ferromagnetic and paramagnetic phases.

Original languageEnglish (US)
Pages (from-to)14339-14342
Number of pages4
JournalJournal of Physical Chemistry C
Volume111
Issue number39
DOIs
StatePublished - Oct 4 2007
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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