Being inexpensive and widely available, clays represent an attractive substrate for immobilization of variety of photocatalyst. Clays are natural minerals with hydrous aluminium silicates and feature a layered structure composed of silicate (Si2O5) sheets bonded to aluminium oxide/hydroxide (Al2(OH)4) (also called gibbsite sheets). Ion exchange intercalation process of clays is often used to incorporate the catalyst into the basal space of the layered structure of silicates resulting in clay composites. Such composites are more reactive towards the oxidation of organic substrates due to increase in the basal space and cation exchange capacity. Moreover, adsorption capacity of clays also facilitates better catalytic efficiency as compared to bare nanoparticles generating bifunctional nature for these composites. There are three distinct advantages of intercalation: (i) proper dispersion of nanosized photocatalyst in a solid supports thus generating distinct reaction sites (ii) solid support used shall be effective for stronger adsorption thereby increasing the rate of photo catalytic degradation and (iii) less amount of photocatalyst will be required for degradation of organic pollutants. One such attempt is explored in the present work where the nanosized ZnO is incorporated in naturally occurring bentonite clay with the view that this composite may possess better efficiency.