The local structure of TiO2-based nanotubes intercalated with iron (III)

Transmission electron microscopy, X-ray photoelectron spectroscopy, and 57Fe Mossbauer spectroscopy have been used to study TiO2-based nanotubes (TNTs) intercalated with 57Fe. A structural model of doped TNTs has been proposed that includes TNTs in the form of a “scroll” with nonmagnetic Fe-O-Fe layers spaced at ∼0.7-nm intervals in the interlayer spacing and ∼20-nm iron oxide clusters on the outer surface of the TNTs.