Invention relates to a process for preparing Nano-particles from ZnO is provided, the process involves co-precipitation method. 0.02 M aqueous solution of zinc acetate di-hydrate is put into 100 ml of distilled water under vigorous stirring. After 10 min stirring, 3mLof Electroplating waste was added to the above solution. After addition of extract, 2.0 M aqueous sodium hydroxide solution is introduced into the above aqueous solution drop wise, resulting in a white aqueous solution at pH 12, which is then placed on magnetic stirrer for 2 hrs. The precipitate is then taken out and washed repeatedly with distilled water followed by ethanol to remove the impurities for the final products. Then a white powder is obtained after drying at 60 °C in vacuum oven overnight.
Status of Patent: Indian Patent Pending No.2147/MUM/2013