Photocatalytic and superhydrophilicity properties of N-doped TiO2 nanothin films |
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| Authors: | M ChekiniMR Mohammadizadeh SM Vaez Allaei |
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| Institution: | a Superconductivity Research Laboratory (SRL), Department of Physics, University of Tehran, North Karegar Ave., P.O. Box 14395-547, Tehran, Iran
b Departement of Physics, Brock University, St. Catharines, ON, L2S 3A1, Canada |
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| Abstract: | 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 1 nm (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. |
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| Keywords: | 61 72 U- 81 16 Be 82 65 +r 82 30 Rs |
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