Journal
APPLIED SURFACE SCIENCE
Volume 257, Issue 16, Pages 7179-7183Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2011.03.084
Keywords
Sol-gel; N-doped TiO2 thin film; Spin coating; Hydrophilic; Photocatalytic
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Funding
- Research Council of the University of Tehran
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Pure TiO2 and nitrogen doped titanium dioxide (N-TiO2) thin films were prepared by sol-gel method through spin coating on soda lime glass substrates. TiCl4 and urea were used as Ti and N sources in the sol. XRD results showed nitrogen doping has retarded anatase to rutile phase transformation. The doping also leads to a decrease in roughness of the samples from 4 nm(TiO2) to 1nm (N-TiO2). However, surface analysis by statistical methods reveals that both surfaces have self-affine structure. Optical band gap of thin films was shifted from 3.65 eV (TiO2) to 3.47 eV (N-TiO2). Hydrophilic conversion and photocatalytic degradation properties of thin films were investigated and exhibited that N-TiO2 thin film has more preferable hydrophilicity and photocatalytic properties under UV illumination. (C) 2011 Elsevier B.V. All rights reserved.
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