Application of Chemometrics Methods to Resolve Intermediates Formed During Photocatalytic Degradation of Methyl Orange
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Date
2016-06
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Addis Ababa Universty
Abstract
The efficiency of two catalysts (TiO2 and TiO2 supported on zeolite) for the photocatalytic
degradation of MO dye has been evaluated by means of chemometrics methods by using UV/Vis
spectroscopic data of the degraded dye. This study provides clear evidence about the catalytic
efficiency of the two catalysts under UV light irradiation for the degradation of MO dye. MCRALS
statistical method was used for the catalytic efficiency evaluation. MO photodegradation at
pH 3 using TiO2 catalyst shows better decolorization efficiency than at pH 8 and using TiO2
supported on zeolite catalyst but the kinetics of MO degradation is quicker at pH 8. For the
degradation using TiO2 at pH = 3, after 150 min of photocatalysis reaction, the species that
shows the concentration profile of MO disappears. The kinetics data reveals that the reaction is
first order with respect methyl orange in any case.
Key words: Chemometrics, Photodegradation, MCR-ALS, MO and TiO2
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Keywords
Chemometrics, Photodegradation, MCR-ALS, MO and TiO2