Influence of pH value on particle size and morphology of zinc oxide powders obtained by solvothermal synthesis

Abstract

Zinc oxide powders have been synthesized from ethanolic zinc acetate solutions in the presence of lithium hydroxide by the solvothermal method. In this work we have considered the influence of pH value on morphology and size of ZnO particles for temperature 200oC and reaction time 2 h. The ZnO powder microstructure was controlled using X-ray diffraction and field emission scanning electron microscopy. Grain size of ZnO particles ranges in the interval (40–200) nm depending on pH value. Increasing of pH value result in decreasing of particle size, changing from hexagonal to round particle form and uniforming of particle shape and size.