Abstract

Zinc oxide nanoparticles were synthesized using a commercial ultrasonic homogenizer in a sonochemical reaction between 0.05 M zinc nitrate and hexamethylenetetramine. The solutions in glass vessels of varying shapes i.e. cube, cylinder and sphere were sonicated with a 45 W 20 kHz ultrasonic pulse for 60 min under ambient conditions. The crystalline ZnO phase was confirmed by powder X-ray diffraction and scanning electron microscopy with average particle diameters around 70 nm from the three different vessels. These ZnO particles were smaller than those previously synthesized in ultrasonic baths and sonoreactors. © 2013 Copyright Taylor and Francis Group, LLC.