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Updated: Jul 31, 2026

Activating Molecules, Ions, and Solid Particles with Acoustic Cavitation
Published on: April 12, 2014
Activation of TiO2 photocatalyst by single-bubble sonoluminescence for water treatment
Hirotsugu Ogi1, Masahiko Hirao, Masashi Shimoyama
1Graduate School of Engineering Science, Osaka University, Toyonaka, Japan. ogi@me.es.osaka-u.ac.jp
Abstract:
Single-bubble sonoluminescence (SBSL) continues to attract many researchers because the physics behind it remains uncertain and few applications have appeared. In this study, we propose to apply SBSL to a water-treatment technique. The SBSL flashes contain intense ultraviolet light, which activates a TiO2 photocatalyst to decompose organic compounds in water. This mechanism comes from the similar spectrum patterns between SBSL emission and TiO2 absorption. SBSL in solutions containing small amount of TiO2 powder decomposed phenol and 2,4-dinitrophenol with efficiency several times higher than those by the existing methods.
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