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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    No. 6    December 2009

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Enhanced photocatalytic degradation properties of nitrogen-doped titania nanotube arrays
DONG Lin(董 林)1, 2, CAO Guo-xi(曹国喜)2, MA Ying(马 莹)1, JIA Xiao-lin(贾晓林)1,
YE Guo-tian (叶国田)1, GUAN Shao-kang(关绍康)1

1. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450052, China;
2. Ancai Hi-Tech Co., Ltd., Anyang 455000, China

Abstract:Nitrogen-doped TiO2 nanotubes array were synthesized to improve the photocatalytic efficiency by annealing the anodized titania nanotubes with ammonia at 500 ℃. Detailed structural analysis revealed that the nitrogen-doped titania nanotubes are of highly ordered structure, and exhibit a decreased phase transformation temperature compared with those that are not doped, as evidenced by the decrease in full width at half maximum (FWHM) of the (110) peak of rutile phase and the occurrence of the typical Raman peaks of rutile phase at 196, 235, 442, 610 cm−1. According to the photocatalytic degradation of methyl orange under visible light irradiation, the nitrogen-doped TiO2 nanotubes exhibit enhanced photocatalytic efficiency compared with their non-doped nanotubes, which might be a result of either the nitrogen doping induced band gap narrowing or the synergistic effect produced by both nitrogen and fluorine dopants.

 

Key words: TiO2; nanotubes; nitrogen-doping; photocatalytic degradation

ISSN 1672-7029
CN 43-1423/U

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