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.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films