Abstract

We report the Synthesis of different CuO (ellipsoid, ribbon and sheet like) nanostructures in a solution phase with high yield at low cost by simple reduction of aqueous solution of copper nitrate with alkaline solution of sodium hydroxide (NaOH). The morphology of the synthesized nanostructures is significantly influenced by the feeding concentration of alkaline NaOH solution. Cu(OH)(2) nanomaterials can be readily obtained by the reduction of Cu(NO(3))(2) solution with NaOH solution and these synthesized materials obtained at different molar concentration of NaOH solution get transformed into different nanostructures of CuO by subsequent heat treatment at 80 degrees C for half an hour. Nanoellipsoid, nanoribbon and nanosheet like structures were obtained after heating the copper nitrate solution reduced with 0.25 M, 0.50 M, 0.75 M and 1 M concentrated NaOH solution respectively. Optical absorption spectra and corresponding band gap calculation showed that these nanomaterials have higher band gap than their bulk materials.