Preparation of N Doped TiO2 by Using ACF as Template and Its Photocatalytic Application in Removing Nitrogen from Water

doi:10.7517/j.issn.1674-0475.2005.05.374

Abstract

Abstract: TiO_2-xN_x nanoparticles were prepared by a sol-gel method with using ACF as template, and were characterized using various techniques such as XRD,SEM and TEM, XPS and UV-Vis. The particles were mainly in anatase form, about 10 nm in size, with certain nanotube structures (d 5 nm). The ratio of Ti to N in N doped TiO₂ can reach 1:0.19.The absorbency wavelength in UV-Vis spectra may extend to 700—800 nm. The photocatalytic activities of TiO_2-xN_x were evaluated by the photocatalytic oxidation of ammonia in water using ultraviolet or solar light as light source. The best ammonia removal(2 h) under solar light and UV photocatalysis reached 47% and 68% respectively. It is concluded that nitrogen doping contributes to visible light activity and oxidative removal of ammonia from water.

Key words: titanium dioxide, photocatalytic oxidation, visible light activity, ammonia removal, N doping

CLC Number:

LI Wei, LIU Li-fen, YANG Feng-lin, ZHANG Xing-wen, YU Jimmy Chai-mei. Preparation of N Doped TiO₂ by Using ACF as Template and Its Photocatalytic Application in Removing Nitrogen from Water[J]. Imaging Science and Photochemistry, 2005, 23(5): 374-381.

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Preparation of N Doped TiO₂ by Using ACF as Template and Its Photocatalytic Application in Removing Nitrogen from Water

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