All the diffraction patterns agree with the standard Joint Committee on Powder Diffraction (JCPDS) pattern of zincite [36e1451]. The crystal structure of the ZnO nanopowders was evaluated using DIAMONDecrystal and molecular structure visualization software with the help of PXRD data. This confirms the hexagonal Wurtzite (P63mc) structure of ZnO with lattice parameters a ¼ 3.24982 Å and c ¼ 5.20661 Å. The crystal lattice and structural parameters of ZnO nanopowders are presented in Table 1.