The paste of nanoclay bentonite was prepared by mixing 2 g of nanoclay bentonite with 0.1 g of polyethylene glycol (Mw 6000) and 0.5 ml of transparent clear commercially available epoxy resin this mixture paste was prepared in 4 ml ethanol and water mixture. Homogeneous paste was prepared in automatic pigment Muller. Paste was applied onto MS plate using bar coater and then it was dried at 110 ◦C. The thickness of the coating film on MS plate was maintained between 50 and 90 _m using bar coater. Thickness was determined using the mass and area of the coating. Weight was taken before and after coating of paste. The determined thickness was confirmed using dry film thickness meter gauge. The MS plate is 15 cm ื 5 cm was used as support on which catalyst was coated.