《Nitrogen-doped TiO2 from TiN and its visible light photoelectrochemical properties》.pdf

Available online at Electrochemistry Communications 10 (2008) 367–371 /locate/elecom Nitrogen-doped TiO2 from TiN and its visible light photoelectrochemical properties Xiaoli Cui *, Ming Ma, Wei Zhang, Yanchao Yang, Zhuangjian Zhang Department of Materials Sciences, Fudan University, Shanghai 200433, China Received 5 December 2007; received in revised form 19 December 2007; accepted 21 December 2007 Available online 2 January 2008 Abstract Homogeneous titanium nitride (TiN) thin film was produced by simple electrophoreic deposition process on Ti substrate in an aque- ous suspension of nanosized TiN powder. Nitrogen-doped titanium dioxide (TiO N ) was synthesized by oxidative annealing the 2x x resulted TiN thin film in air. Photoelectrochemical measurements demonstrated visible light photoresponse for the electrode of annealed electrophoreic deposited TiN samples. It is found that the synthesized TiO2xNx electrode showed higher photo potential under white and visible light illumination than the pure TiO2 electrode. The photocurrent under visible light illumination was also observed, which increased with the increase of deposition time of TiN thin films. 2008 Elsevier B.V. All rights reserved. Keywords: Nitrogen-doped titanium dioxide; Titanium nitride; Electrophoreic deposition; Visible light; Water splitting 1. Introduction photocatalytic activity [5