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http://dx.doi.org/10.14478/ace.2017.1129

Visible Light Induced Photocatalytic Activity of N-doped TiO2  

Lee, Seo Hee (Department of Environmental Engineering, Kongju National University)
Lee, Chang-Yong (Department of Environmental Engineering, Kongju National University)
Publication Information
Applied Chemistry for Engineering / v.29, no.3, 2018 , pp. 298-302 More about this Journal
Abstract
Photocatalytic properties of nitrogen doped titanium dioxide were investigated. Photocatalytic degradation of methylene blue under UV and visible light was carried out to characterize N-doped $TiO_2$. The result of XPS indicated that nitrogen atoms substitute for oxygen sites within the crystal structure of $TiO_2$. In the UV-Vis DRS spectra, N-doped amorphous $TiO_2$ absorbed UV light with little absorption of visible light, while the absorption of visible light of amorphous/anatase $TiO_2$ remarkably increased. Methylene blue photocatalytic degradation appeared by the irradiation of UV or visible light onto the N-doped anatase phase of $TiO_2$. However, the degradation rate of visible light was lower than that of UV light. The photocatalytic degradation rate of the amorphous/anatase $TiO_2$ sample was higher than that of the anatase $TiO_2$. These results indicate that the high surface area of amorphous/anatase $TiO_2$ sample, which was about three times larger than those of the anatase $TiO_2$ sample, may be related to small particles of N-doped anatase $TiO_2$.
Keywords
N-doped $TiO_2$; amorphous; anatase; photocatalyst; visible light;
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Times Cited By KSCI : 2  (Citation Analysis)
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