2.2. Synthesis of CdO NPs
Cadmium nitrate (100 ml, 0.5 M) was heated under stirring at a temperature 80oC. Thereafter 100 ml of freshly prepared extract was added drop by drop and left on a hot plate for an hour at a temperature of 160oC under continuous stirring and finally off-white precipitate was formed which was then collected by centrifuge, washed thoroughly with hot deionized water and calcined at 500oC for 2 hour.