Optimization of conditions for generating OH-radical using the hybrid method with the visualization for acoustic fields and the spectral analysis

本研究旨在通过三种方法阐明oh自由基和空化的产生机理，寻找新的应用可能性；声化学发光观察(I)，超声场光学可视化（II）， oh自由基光谱峰观察（III）。预计直径小于共振尺寸的气泡位于驻波声压的反波峰中，并通过I和II的图像对比确认了反波峰中的光发射。鲁米诺发光与oh自由基峰强度之间没有很强的相关性。通过对方法三的改进，确定oh自由基生成的定量分布。

This study is intended to elucidate the generation mechanism of OH-radical and cavitation to find new possibilities for application using three methods; the observation of sonochemical luminescence (I), the optical visualization of ultrasonic fields (II), and the observation of the spectral peaks from OH-radical (III). Bubbles whose diameter is smaller than the resonant size are expected to be in antinodes of the sound pressure of the standing wave, and light emissions in antinodes were confirmed as compared between the images by I and II. Strong correlation between luminol luminescence and OH-radical peak intensities was not obtained. By improving the method III, the quantitative distribution for the OH-radical production will be confirmed.