The nanocomposites of one-dimensional titanate nanotubes (TiNT) and rutile nanocrystals were prepared, for the first time, by microwave irradiation (MW) of titanium nitride (TiN) in a 10 M NaOH solution without using any catalysts and/or nitridation of titania in ammonia atmosphere. The primed advanced nanocomposites have been characterized by HRTEM, XPS, XRD and micro-raman spectroscopy. The results confirmed that the oxidation of TiN occurs during MW treatment at 180oC for 90 min. Afterwards, post treatment acid washing TiNT were formed with many small (6~21 nm) rutile crystal titanium nitrides (TiN0.90), which could uniformly disperse with the outer surface of the nanotubes. This is an interesting and novel nanocomposite structure which significantly increases the photocatalytic activity of nanotubes.The prepared nanocomposities activity was evaluated for treatment of methylene blue dye in water under UV irradiation. Post treatment acid wash samples can only illuminate under UV-Vis light and exhibit higher photocatalytic performance.

Microwave assisted hydrothermal synthesis and characterization of novel nanocomposites of titanate nanotube and titanium nitride nanoparticles

244th National Meeting (2012)

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