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(O3MB)和固定在无纺布上的TiO2光催化剂在水相中降解异丙醇胺的流动式反应器。结果表明，O3MB的加入提高了IPA的分解速度，TiO2光催化剂促进了IPA的矿化。在此基础上，利用间歇式反应器研究了O3MB、无纺布载体、二氧化钛和过氧化氢降解异丙醇的最佳条件，以提高异丙醇的降解效果。确定了非织造布材料或形状、H_2O_2/O_3摩尔比等因素对间苯二甲酸异丙酯降解的影响，并结合O_3浓度确定了最佳条件，因为它具有清除羟基自由基的作用。在这个过程中，证实了OH自由基是IPA的主要活性物种，有助于提高IPA的分解速率及其分解中间产物的矿化率。

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.