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Photocatalytic Degradation of NO2- by Fe3+-Doped TiO2 Nano Particles Prepared by Sol-Gel Method

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Abstract:

The preparation and the photocatalytic degradation NO2 - activity of Fe3+-doped TiO2 nano-sized particles is reported in this paper. The TiO2 nano particles were prepared by sol-gel method. The various influence factors about the synthesis process of the Fe3+-doped TiO2 nano photocatalyst were controlled and investigated by XRD (X-ray diffraction), SEM (scanning electron microscopy), and TEM (transmission electron microscopy) etc.. The results show that the phase compositions, crystalline grain size, crystal structure , and photocatalytic activity of the Fe3+-doped TiO2 particles prepared by the method depend on the synthesis technology parameters such as calcination temperature, holding time, Fe3+ ions concentration etc.. The influence factors of the preparation process has been discussed. The photocatalytic decomposition of NO2 - ion into N2 and O2 using Fe3+ and Ce4+-doped TiO2 photocatalysts were investigated under UV irradiation. It was fund that Fe3+-doped TiO2 photocatalysts shows much higher photocatalytic activity than that of the Ce4+-doped TiO2 . The photocatalytic decomposition effect of NO2 - ion is related to the crystalline grain size, irradiation time, and the Fe3+ ions concentration. The Fe3+-doped TiO2 nano powders exhibited the photocatalytic degradation NO2 - activity under UV light irradiation.

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Periodical:

Materials Science Forum (Volumes 544-545)

Pages:

111-114

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.544-545.111

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Online since:

May 2007

Authors:

Ke Hui Qiu, Chun Mei Zhang, Jun Feng Li, Qun Li, Jie Zhao

Keywords:

Fe3+-Doped TiO2 Photocatalyst, NO2-, Photocatalytic Degradation, Sol-Gel Method

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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