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J. Korean Ceram. Soc. > Volume 48(5); 2011 > Article
Journal of the Korean Ceramic Society 2011;48(5): 433.
doi: https://doi.org/10.4191/kcers.2011.48.5.433
Preparation of CdS-AC/TiO2 Composites Designed for a High Photonic Effect and their Photocatalytic Activity Under Visible Light
Chong-Yeon Park, Jong-Geun Choi, Trisha Ghosh, Won-Chun Oh
Department of Advanced Materials & Science Engineering, Hanseo University
In this study, CdS combined activated carbon/$TiO_2$ (CdS-AC/$TiO_2$) composites were prepared by a sol-gel method to improve the photocatalytic performance of $TiO_2$. These composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and UV-vis analysis. The photocatalytic activities were examined by the degradation of methylene blue (MB) under visible light irradiation. The photodegradation rate of MB under visible light irradiation reached 90.1% in 120 min. The kinetics of MB degradation was plotted alongside the values calculated from the Langmuir-Hinshelwood equation. The 0.2 CAT sample showed the best photocatalytic activity, which might be due to an increase in the photo-absorption effect by activated carbon and the cooperative effect of CdS.
Key words: Activated carbon photocatalysis, $TiO_2$, CdS, Methylene blue, Visible light
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