Zinc oxide nanoparticles were synthesized using wet chemical method. To the 500 ml of 0.5% soluble starch solution, 0.1 mole of zinc nitrate hexahydrate was dissolved. To the above mixture 500 ml of (0.2 mol) of NaOH was added slowly under stirring condition till the mixture turned into milky white colloid solution. Thereaction was continued for 2-3 h and it was made to settled down. Next day it was centrifuged at 1500 rpm for 15 min and the mixture was washed thrice using distilled water to remove any impurities present in it. Later it was dried and calcined at 500◦C for 2 h.