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