Synthesis of bundle-like structure of titania nanotubes

摘要

Bundle-like structure of titania nanotubes has been synthesized via the reaction of anatase titania nanoparticles and NaOH aqueous solution at higher treatment temperatures (higher than 190 deg C) after calcination at 500 deg C for 1 h. The bundle-like structure of titania nanotubes is characterized by transmission electron microscope (TEM) and field-emission scanning electron microscope (FE-SEM). The tubular structures of titania with diameters of 5-15 nm are confirmed by TEM. The effects of treatment temperatures on the morphologies of titania nanostructures are investigated. As SEM images show, when the treatment temperature is 170 deg C, randomly oriented structure of titania nanotubes coexisting with titania nanobelts are obtained. However, bundle-like structure of titania nanotubes with lengths of several micrometers are fabricated at high treatment temperatures (higher than 190 deg C). X-ray diffraction (XRD) pattern shows that anatase phase titania nanotubes are synthesized after calcination at 500 deg C for 1 h.