Nowadays there is a continuously increasing worldwide concern for organic micro pollutants such as antibiotics, personal care products, plasticizers, surfactants, herbicides, etc., because they generate significant environmental problems. Unfortunately, conventional waste water treatment techniques can not completely remove all residues of these emerging contaminants. In this context, the development of nanotechnology in the sector of Advance oxidation process (AOP) Photocatalysis creates opportunities for environmental cleanup at relatively lower costs.