Study on Nitrogen-doped Titanium Dioxide's Degradation of Nirogen Pollutants in Water with Visible
Light Photocatalysis

Abstract

Abstract:

Objective: To investigate the degradation activity of nitrogen-doped titanium dioxide to the Nitrogen pollutants with
visible light photocatalysis. Methods: Nitrogen- doped titanium oxides（N- TiO₂）with different amounts of N were prepared via hydrothermal method by using thiourea as nitrogen source. The structure and morphology of N-TiO₂were characterized by X-ray powder diffraction（XRD）and transmission electron microscopy（TEM）respectively. The visible light photocatalysis activities of the N-TiO₂series samples were evaluated by the degradation of rhodamine B in aqueous solution, and the nitrogen pollutant degradation activity of the optimum N-TiO₂ on the nitrogen pollutants were explored by using acephate as the nitrogen model pollutant. Results:The visible light photocatalysis activity of TiO₂ was enhanced when appropriate amount nitrogen was doped into TiO₂, and 1.0% N-TiO2 showed the highest visible light photocatalysis activity. The total nitrogen can be degraded from class Ⅳ water quality to class Ⅱ water quality after 4 hours' visible light irradiation using 1.0% N-TiO₂ as the photocatalyst. Conclusion: Nitrogen-doped titanium oxide can degrade nitrogen pollutants in water effectively under visible light irradiation.

Key words: nitrogen-doped, titanium oxide, nitrogen pollutant, visible light photocatalysis

CLC Number:

O611.3

Zhang Yao, Li Lihui, Yan Ya*. Study on Nitrogen-doped Titanium Dioxide's Degradation of Nirogen Pollutants in Water with Visible
Light Photocatalysis[J]. J4, 2015, 14(12): 51-55.

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