P13 超音波光触媒反応における光触媒種の影響

抄録

Advanced oxidation processes (AOPs) were widely investigated to solve environmental pollution caused by organic pollutants. In this study, we focused on photocatalytic degradation under ultrasonic irradiation without the light source. Because by the US irradiation, photocatalyst can work under dark condition. Zinc oxide (ZnO) which is cheaper than TiO₂ was chosen as the photocatalyst in this study. On the other hand, two types of aldehydes with different physical properties, benzaldehyde and formaldehyde, were chosen as model organic poluutants in water to investigate those reactivity under US irradiation. In case of US/ZnO condition, removal ratio of benzaldehyde was remarkably improved like US/TiO₂ condition. However, it only confirmed in the early stages of the degradation. From this result, it was thought that the reaction by US/ZnO can be dependent on pH of the solution and the degradation products.