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Intensified Nanoparticle Synthesis Using Hybrid Microwave and Ultrasound Treatments: Consecutive and Concurrent Modes
Author(s) -
Shibatani Atsuya,
Kan Haruka,
Asakuma Yusuke,
Saptoro Agus
Publication year - 2020
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201900199
Subject(s) - bumping , microwave , ultrasound , nanoparticle , superheating , materials science , particle (ecology) , nanotechnology , bubble , microwave irradiation , acoustics , computer science , mechanical engineering , thermodynamics , telecommunications , engineering , physics , oceanography , geology , parallel computing
Bubble formation around nucleated particle is inevitable when quick heating of microwave is employed in nanoparticle synthesis. Since these bubbles may cause bumping behavior, the bubble growth must be possibly suppressed to ensure stable microwave‐assisted operation. In this study, sequential and simultaneous ultrasound treatment and microwave irradiations on nanoparticle synthesis are proposed and investigated to assess the benefit of ultrasound in preventing superheating behavior and producing finer particles. Experimental results indicate that the inclusions of ultrasound treatment result in finer particle sizes and suppression of bumping behavior. Particularly, consecutive ultrasound treatment and microwave irradiation are recommendable due to its practicality and generating smallest bubbles and final particle sizes. This technique can therefore be expected as an innovative way to enhance industrial applications of quick thermal response induced by microwave.