Photocatalytic Degradation of Cobalamin by Metalized TiO2 | ||
| Journal of University of Babylon | ||
| Article 1, Volume 22, Issue 1, January 2014, Pages 445-453 | ||
| Authors | ||
| Ahmed F. Halbus; Falah H. Hussein | ||
| Abstract | ||
| The purpose of this study was to investigate experimentally the degradation of cobalamin by suspensions of platinum and other metals supported on Hombikat UV100 . The effect of temperature on the efficiency of photodegradation of cobalamin was studied in the range 278-298K using UVA source of irradiation. The activation energy was calculated according to Arrhenius plot, and was found equal to 22 ±1 kJ.mol-1 for TiO2. The results showed that pH of reactants was changed at the end of reaction towards 7 independent on the initial pH . The results of the total organic carbon (TOC) analysis indicate that the rate of degradation of dye was faster than the total mineralization. Decolorization and mineralization of cobalamin in the absence of light and/or catalyst were performed to demonstrate that the presence of light and catalyst is essential for the degradation of this cobalamin. The results show that the activity of different types of metals used in this study was in the following the sequence: Pt/TiO2 > Pd/TiO2 > Au/TiO2 | ||
| Keywords | ||
| photocatalytic degradation; cobalamin; metalized titanium dioxide | ||
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