Solar photocatalytic degradation of Acid Black 1 with ZnO
نویسنده
چکیده
The degradation of an azo dye, Acid Black 1 (AB 1) with ZnO as photocatalyst using natural solar light in aqueous solution has been investigated under different conditions. The degradation is more with solar/ZnO process than with solar/TiO2-P25 process at pH 9. The influence of operational parameters such as the amount of photocatalyst, dye concentration and initial pH on photodegradation by ZnO has been analyzed. The degradation of AB 1 follows pseudo-first order kinetics according to the Langmuir-Hinshelwood model. The intermediates formed during the photodegradation have been identified by GC-MS analysis. The mineralization of AB 1 has been confirmed by cyclic voltammetric and COD measurements.
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