Sono-photo synergetic effect using photocatalytic fiber (2)

Abstract

Fundamental aspect of sonophotocatalytic reaction with photocatalytic fiber was surveyed. Photocatalytic fiber has advantages that separation from liquid phase is easier than photocatalytic particles. Frequency of ultrasound generator used was 200kHz or 2.4MHz. A KI aqueous solution was employed to evaluate sono/photocatalytic oxidation. In the result, simultaneous irradiation of ultrasound at 2.4MHz and ultraviolet to photocatalytic fiber demonstrated synergetic effect. This specific phenomenon is because microjet effect occurred by 2.4MHz ultrasound irradiation, and then photocatalytic activity increased. Sonochemical field in the presence of fibers were visualized by a luminol method.