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

本研究旨在阐明OH-自由基和空化的产生机制，以寻找新的应用可能性，使用三种方法：观察声化学发光（I），超声场的光学可视化（II）和OH-自由基的光谱峰的观察（III）。直径小于共振尺寸的气泡预计位于驻波声压的波腹中，并且通过I和II的图像之间的比较确认了波腹中的光发射。鲁米诺发光和OH-自由基峰强度之间没有很强的相关性。通过改进方法III，将确认OH-自由基产生的定量分布。

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.