Rietveld refinement and optical parameters of ZnO nanopowder synthesized by co-precipitation method.

Zinc oxide (ZnO) nanopowder samples were prepared by using co-precipitation method, with varying parametric conditions. Rietveld refinement technique is used to study the structural properties of synthesized samples. XRD and UV spectroscopy techniques have been used to characterize the samples which resemble ZnO nanostructures. Observed lattice parameters are a = b = 3. 2 4 8 2 Å and c = 5. 2 0 1 1 Å for sample A, a = b = 3. 2 5 0 0 Å and c = 5. 2 0 6 2 Å for sample B, a = b = 3. 2 4 9 7 Å and c = 5. 2 0 1 7 Å for sample C, a = b = 3. 2 5 5 0 Å and c = 5. 2 1 2 2 Å for sample D. The varying unit cell volume and axial ratio for all samples are calculated as 47.52–47.82 Å and 1.6006–1.6019. VESTA software is used to calculate the bond angles and lengths of Rietveld refinement data. UV-Vis spectroscopy analyzed the absorption, transmission, refractive index and band gap of samples for their possible use in different industrial applications. [ABSTRACT FROM AUTHOR]