Preparation of Nano-ZnO with Different Sizes by Ultrasonic Precipitation

Using zinc sulfate and oxalic acid as raw materials,nano-ZnO with different particle sizes was prepared by ultrasonic precipitation method,the effects of process conditions on the particle size were discussed.The results showed that nano-ZnO with average particle sizes from 21 nm to 47 nm could be prepared by ultrasonic precipitation.The preparation conditions had an notable influence on the particle size,and with the oxalic acid and ratio of zinc sulfate increased,particle size increased,while the particle size decreased with reaction temperature increasing.And that the ways to add the precipitator to zinc salt solution also had a greater effect on the particle size,the particle size by once addition was smaller than that by gradual addition.