Comparison between photo catalytic activity of pure ZnO and silver ion
doped ZnO For decomposition of Methyl Green (MG) dye from wastewater

Ahmed A. Abdel-Khalek; Hossam F. Nassar; Fagr Kh. Abdel-Gawad; Afaf Hashem

Abstract

Comparison between photo catalytic activity of pure ZnO and silver ion doped ZnO For decomposition of Methyl Green (MG) dye from wastewater

Author(s): Ahmed A. Abdel-Khalek, Hossam F. Nassar, Fagr Kh. Abdel-Gawad and Afaf Hashem

Developing hygienically advanced water treatment technologies is a must as a result of environmental pollution and industrialization. Currently used water treatment technique requires high costs and well equipped laboratories. Efficient water treatment imposes conversion of hazardous substances to safe ones in addition to evolution of efficient risk management approaches from dangerous effects of pollutants which are toxic, everlasting and laborious to be treated. The present work represents a method for treatment, deterioration and decolorization of methyl green (MG) in wastewater using both pure ZnO and Ag+ doped ZnO under UV- Visible light. The photodegradation processes of dye have been studied using UV–Vis spectrophotometry. The parameters studied were the initial pH values using NaOH and H2SO4, amount of catalyst, initial dye concentration, and the presence of NaCl, and Na2SO4. The effect of pure ZnO as catalyst has been compared with Ag+ doped ZnO catalyst. The optimum conditions had been determined, and found the efficiency of degradation for both catalyst. From results found the dye degradation was more efficient in case of Ag+ doped ZnO than pure ZnO.

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