Phenolic compounds are widely used and consequently have become one of the common pollutants in aquatic environment. Chlorophenols are used directly as pesticides or converted into pesticides. They also have been used as antiseptics. In addition to being produced commercially, small amounts of some chlorophenols may be produced when wastewater or drinking water is disinfected with chlorine. Chlorophenols cause serious environmental problems because these are difficult to decomposed biologically, and are mutagenic as well as carcinogenic in nature. Nanoparticles synthesized in the lab were successfully employed for the photocatalytic degradation of phenolic compounds. Upto 98% of phenolic complounds could be mineralized by photocatalytic degradation using silver-doped titania.