Effect of capping agent on cu doped zno nanoparticles by solvothermal method
Copper doped Zinc oxide nano particles were synthesised using poly vinyl pyrrolidone (PVP) as a capping agent by solvothermal method. The influence of the capping agent was studied. The prepared samples were characterised by XRD, IR, UV – VIS, TEM, SEM with EDAX and PL. TEM study shows spherical-like particle structure with average size of 25 nm. This is in good agreement with that estimated by Debye’sScherrer’s formula from the XRD pattern.The band edge emission peaks at 415 nm and 629 nm. The higher concentration of PVP, which enhances illuminenscence of Cu doped ZnO nano particles. ZnO hexagonal structure are detected by X-ray diffraction pattern with preferred orientation along (200) direction. The atomic % of Cu and ZnO are almost equal to their nominal stoichiometry within the experimental error. EDAX spectrum shows that the well agreement with experimental concentration elemental composition of Cu doped Zin Oxide nanoparticles. The band gap energy of the bulk ZnO nano material was 3.2 eV (388 nm) at room temperature. The band gap energy decreases with increasing concentration of PVP. SEM image reveals that the ZnO nano particles have spherical-like particle structure and it is homogeneous and uniformly distributed throughout the structure.