Nano-sized ZnO Powders Prepared by Co-precipitation Method with Various pH

In this work, nano-sized ZnO powders have been synthesized by the co-precipitation method with Zn(CH3COOH)2 center dot 2H2O, HCl, and NH3 center dot H2O as raw materials in various pH ranging from 8 to 10. The purity, microstructure, chemical group analysis, morphology of the prepared ZnO powders were studied by X-ray diffraction (XRD), Fourier transform infrared spectrometer (FTIR), energy dispersive X-ray spectrometry (EDX), and scanning electron microscope (SEM), respectively. Rietveld refinement of XRD data showed that ZnO crystallizes in the wurtzite structure with high purity. The obtained powders were nano-sized particles with the average crystallite size about 17.9 +/- 2.1 run synthesized with pH of 9.5, at 85 degrees C, and stirring time of 6 h. The SEM results have visualied the morphology of ZnO nanoparticles with spherical-like shape. The effect of processing conditions on morphology of ZnO was also discussed.