Development and systematization of the effective photocatalysis method in liquid phase using UV light and ozone

提出了一种利用臭氧微泡（O3 MB）和非织造布负载的TiO 2光催化剂在水相中降解IPA的流动式反应器。结果表明，O3 MB的加入提高了IPA的分解速率，TiO 2光催化剂促进了IPA的矿化速率。作为进一步的研究，O3 MB，无纺布负载TiO 2，和H2 O2分解IPA的最佳条件进行了研究，使用间歇式反应器，以提高IPA的降解。考察了非织造布的材质、形状、H2 O2/O3摩尔比等因素对IPA降解的影响，并结合O3作为OH自由基的清除剂，确定了最佳条件。在此过程中，OH自由基是主要的活性物种，并有助于提高IPA的分解速率及其分解中间体的矿化速率。

We proposed a flow type reactor for IPA degradation in water phase using ozone microbubbles (O3MB) and TiO2 photocatalyst fixed on nonwoven fabric. It was confirmed that decomposition rate of IPA improved by addition of O3MB and the mineralization rate was promoted by TiO2 photocatalyst. As the further research, the optimal condition of the IPA decomposition by O3MB, nonwoven fabric support TiO2, and H2O2 was investigated using a batch type reactor in order to improve the IPA degradation. The influences on IPA degradation, such as the material or shape of nonwoven fabric and molar ratio of H2O2/O3 with or without UV irradiation, were confirmed and the optimal condition was decided in consideration with O3 concentration because it acts as OH radical scavenger. In this process, it was confirmed that OH radicals were main active species, and contributed to improvement in the decomposition rate of IPA and the mineralization rate of its decomposition intermediates.