Results and discussion
The structural characterization The powder XRD patterns of Co 2+ doped ZnO nanopowder is
shown in Fig. 1. No peaks related to Co species are observed in the diffraction patterns which revealed that the doped Co 2+ ion does not change the crystal structure and is doped into the crystal lattice without changing the wurtzite structure of ZnO. All the peaks observed in the prepared sample could be fitted with standard hexagonal/w urtzite ZnO structure (JCPDS No. 36–1451) and the correspondi ng patterns are indexed with their diffraction planes.