摘要：The photocatalytic degradation on semiconductors especially on TiO2 and ZnO were carried outin presence of light to observe good semiconducting property. In this paper the preparation,charectrization and applications of semiconducting materials were studied. The purification ofwastewater in the presence of photocatalysts were carried out. The photocatalytic degradation ofdyes Methylene blue, Acid blue-29, and Alizarin red-S were used in this experiment. A Total timerequired for photocatalytic degradation is different for different effluent samples, varied from 60to 180 min. Parameters like band gap; Dose of Catalysts concentrations of effluent, pH, etcwere studied. Studies The TiO2 shows more photocatalytic efficiency than ZnO. The degradationof the dye by using semiconducting materials were characterized by XRD, SEM and EDXanalysis before and after application of photocatalysts.
