Dyes are used widely in various colour industries like pulp, yarn, plastic etc. These dye materials are excreted in environment which pollutes it. A dye as case study, Brilliant Green has been removed through photo catalytic degradation process using a new semiconductor BaO3TiO center dot SrO3TiO. Optimum conditions are arrived at by varying pH, concentration of dye, amount of semiconductor, intensity of light etc. The process follows pseudo first order kinetics which is confirmed on kinetic parameters. Formation of non-toxic degraded products like NO2, CO2, H2O etc. makes the process of immense importance. Participation of OH free radical is confirmed by scavenger study.