Wastewater contains a variety of toxic dyes and heavy metals. Dyes are released by the different types of industries as environmental pollutants which has become a serious issue for the health of thousands of people. Azo dyes are released from the industries as environmental pollutants and are mixed to the drinking water of human due to their direct discharge into human inhibited areas. Many techniques are available for the degradation of dyes from wastewater such as reverse osmosis, coagulation, ion exchange, photo catalysis, and photo-Fenton etc. However, the traditional photo catalysis and photo-Fenton-like catalytic processes are active only under the irradiation of ultraviolet (UV) light. The photo catalysis involves the generation of electron (e−)-hole (h+) pairs under suitable light irradiation. There are many catalysts that have been used in photo catalysis such as ZnO, CdS, TiO2. TiO2 is used in the photo Fenton reaction that catalyzes the reaction between iron and hydrogen peroxide. There are many advantages of photofenton reaction such as reaction can be carried out with high performance and can be operated at the room temperature.