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A one-step electrochemical method for the production of TiO2-xNx nanotubes

ZHOU Xi-ying, WAN Bin

 

Abstract: Visible-light-active TiO2-xNx nanotube arrays were synthesized in the electrolyte of ammonium fluoride (NH4F) plus triethylamine (C6H15N) via anodic oxidation at 20V for 1h. After annealed for 1 hour under 400 in the air, the anatase phase of TiO2 appears. SEM showed the N-doping TiO2 nanotube arrays have a length of about 120- 150 nm and diameter of about 60nm. XPS analysis implied that nitrogen was successfully introduced into TiO2 lattice replacing oxygen atoms. The UV-Vis absorption spectra showed the absorption edge shift from 380nm to 420nm.

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