Effect of Temperature, Precursor Type and Dripping Time on the Crystallite Size of Nano ZnO Obtained by One-Pot Synthesis: 2 k Full Factorial Design Analysis.

The aim of this work was to determine the effect of temperature, precursor and dripping time on the crystallite size of ZnO nanoparticles synthesized by controlled precipitation according a 2(k) full factorial design. ZnCl2, Zn(NO3)(2) and NaOH were used as precursors. After synthesis, the nano crystalline powder was characterized by XRD (Cu K-alpha), UV-Vis, and HR-TEM. The nano ZnO particles presented a crystallite size between 210 and 260 angstrom (HR-TEM and XRD). The results show that the crystallite size depends on the type of precursor and temperature of synthesis, but not on the dripping time.