Abstract
In this research, we measured the chemical and the physical parameters of increasing ultrasonic power amplitude at a small-diameter ultrasonic horn tip in a volume of 50 ml. This work was done using KI dosimeter, a calorimetric method, electrical power measurements, and photographs of the bubble cloud. Then, the effects of increasing ultrasonic amplitude on the synthesis and the characteristics of MnO2 nanoparticles was studied. The different MnO2 nanoparticles were characterized by using UV-Vis spectroscopy, powder X-ray diffraction (XRD), and field-emission scaning electron microscopy (FESEM). The results showed that when the acoustic power was increased, the crystallite size and the adhesion between nanoparticles increased. However, the synthesis rate of the nanoparticles was not significantly increased. The comparability of the measured data is discussed by considering cavitation dynamics, bubble collapse, high-pressure shock waves, and cavitation shielding.
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Hajnorouzi, A., Rahmanifar, M.S. & Yaghoubi, P. Effects of Increasing Acoustic Power at a Small-Diameter Ultrasonic Horn Tip on the Synthesis and Characteristics of MnO2 Nanoparticles. J. Korean Phys. Soc. 77, 153–160 (2020). https://doi.org/10.3938/jkps.77.153
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DOI: https://doi.org/10.3938/jkps.77.153