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http://dx.doi.org/10.4191/KCERS.2010.47.2.169

Photodecomposition of Different Organic Dyes Using Fe-CNT/TiO2 Composites under UV and Visible Light  

Zhang, Kan (Department of Advanced Materials & Science Engineering, Hanseo University)
Meng, Ze-Da (Department of Advanced Materials & Science Engineering, Hanseo University)
Oh, Won-Chun (Department of Advanced Materials & Science Engineering, Hanseo University)
Publication Information
Journal of the Korean Ceramic Society / v.47, no.2, 2010 , pp. 169-176 More about this Journal
Abstract
The Fe-treated CNT/$TiO_2$ photocatalysts mixed with anatase and rutile phase have been developed for the decomposition of non-biodegradable different organic dyes like methylene blue (MB), rhodamine B (Rh.B), and methyl orange (MO) in two conditions as ultraviolet and visible light respectively. The results indicate that all the Fe-CNT/$TiO_2$ composites proved to be more efficient photocatalysts since degradation of MB at higher reaction rates, tthe decomposition rate of different dyes increases with an increase of $Fe^{3+}$ concentration in composites the highest rate of decomposition of different dyes was noted under UV irradiation. These results can indicate that the large CNT network is facilitate the electron transfer and strongly adsorb dye molecules on the texted photocatalysts, iron is reactive in the photo-Fenton process resulting in high production of OH radicals and also high activity of the photocatalyst. And Fe particles can generate more photoinduced electrons to conduction band of $TiO_2$ under visible light irradiation. The composites of Fe-CNT/$TiO_2$ photocatalysts synthesized by a sol-gel method were characterized by BET, TEM, SEM, XRD and EDX.
Keywords
Photocatalytic activity; Fe-CNT/$TiO_2$ composites; Ultraviolet; Visible light;
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