Direct Hydrothermal Processing of Long Titanate Nanofibers from Natural Rutile
Via the direct hydrothermal processing using natural rutile as a starting material, long titanate nanofibers (typically 10-500 μm in length and 20-50 nm in diameter) have been successfully synthesized in high yield Transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), electron diffraction, and UV-Vis spectroscopy demonstrated that the as-synthesized nanofibers presumably consisted of sodium hydrogen trititanate ((Na,H)2Ti3O7, e.g., Na0.4H1.6Ti3O7) including some hexatitanate-type defects ((Na,H)2Ti6O13). The direct hydrothermal treatment for natural rutile will be a promising low-cost processing for 1-D nanomaterials, which can act not only as the reaction step but also as the purification.
T. Ohji, T. Sekino and K. Niihara
Y. Suzuki et al., "Direct Hydrothermal Processing of Long Titanate Nanofibers from Natural Rutile", Key Engineering Materials, Vols. 317-318, pp. 243-246, 2006