The powder XRD of the ZnO nanoparticles, ZnO nanoparticles(hydrothermal) and ZnO flowers was recorded in Rigaku Ultima IVX-ray diffractometer (Fig. 1). The diffraction peaks of the samplesare indexed which corresponds to the hexagonal wurtzite structureof ZnO (JCPDS No. 36-1451) with lattice constants of a = 0.325 nmand c = 0.521 nm. No traces of other impurities like Zn(OH)2wasobserved.