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Preparation of Fe-AC/$TiO_2$ composites and pH dependence of their Photocatalytic activity for methylene blue  

Meng, Ze-Da (Department of Advanced Materials & Science Engineering, Hanseo University)
Zhang, Kan (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 Crystal Growth and Crystal Technology / v.19, no.5, 2009 , pp. 268-276 More about this Journal
Abstract
In this study, activated carbon (AC) was treated with ferric ion by a sol-gel method. The compound (Fe-AC) was employed for the preparation of Fe-activated carbon/$TiO_2$, (Fe-AC/$TiO_2$) composites. The prepared Fe-AC/$TiO_2$ composites were characterized with surface properties, structural crystallinity, elemental identification and photocatalytic activity. The SEM results showed that ferric compounds and titanium dioxide were fixed onto the AC surfaces. The XRD results showed that Fe-AC/$TiO_2$ composites mostly contained anatase phase. EDX showed the presence of C, O, and Ti with Fe peaks in all samples. Its photocatalytic degradation effect was evaluated with the degradation behavior of the methylene blue (MB) solution. MB degradation could be attributed to the synergetic effects of adsorption, photo-degradation of $TiO_2$ and photo-Fenton of Fe component. The degradation rate for this photocatalysis was evaluated as a function of the concentration of the dye, the amount of $TiO_2$ and the pH. Photocataytic activity is good at activity pH.
Keywords
Activated carbon; $TiO_2$; Composite; Methylene blue; pH;
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Times Cited By KSCI : 2  (Citation Analysis)
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