Decomposition of 2-Propanol in the Liquid Phase Using a Photocatalyst Immobilized on Nonwoven Fabric and Ozone Microbubbles
Decomposition of 2-Propanol in the Liquid Phase Using a Photocatalyst Immobilized on Nonwoven Fabric and Ozone Microbubbles
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DOI：
10.1007/s11270-019-4292-9
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发表时间：
2019-10
期刊：
影响因子：
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通讯作者：
Fumio Yasui;K. Sekiguchi;H. Tamura
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文献类型：
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作者：
Fumio Yasui;K. Sekiguchi;H. Tamura
2-丙醇（IPA）是一种高度水溶性的挥发性有机化合物，用于半导体制造过程中的清洁和干燥工艺。IPA也被用作制药领域的消毒剂。水洗涤器处理是用于IPA收集的方法之一。然而，水洗涤需要废水处理。在这项研究中，我们提出了一个在液相中的IPA分解系统的基础上，固定在非织造布（TiO 2非织造布）和臭氧微泡（MBs）的TiO 2光催化剂。与固定的TiO2厚无纺布表现出更高的IPA去除率比所表现出的褶皱织物。IPA分解产生丙酮，丙酮可以进一步分解并可能进行矿化。通过引入形成MB的臭氧，可以向整个水箱供应臭氧，这显著影响IPA的分解。IPA的有效分解是通过结合臭氧MBs，TiO 2无纺布，和紫外线照射，大概是因为光催化剂促进分解产物的矿化。因此，OH自由基从O3MBs竞争捕获的分解产物强烈促进IPA的分解，提高IPA的分解速率。
2-Propanol (IPA) is a highly water-soluble volatile organic compound that is used in the cleaning and drying processes during semiconductor fabrication. IPA is also used as a disinfectant in the pharmacy field. Water scrubber processing is one of the methods used for IPA collection. However, water scrubbing requires wastewater treatment. In this study, we propose a decomposition system for IPA in the liquid phase based on a TiO2photocatalyst immobilized on nonwoven fabric (TiO2nonwoven fabric) and ozone microbubbles (MBs). The thick nonwoven fabric with immobilized TiO2exhibits a higher IPA removal rate than that exhibited by the pleated fabric. IPA decomposes to produce acetone, which can be further decomposed and possibly undergo mineralization. The entire water tank can be supplied with ozone by introducing the MB-forming ozone, which considerably affects the decomposition of IPA. The efficient decomposition of IPA was achieved by combining ozone MBs, TiO2nonwoven fabric, and ultraviolet irradiation, presumably because the photocatalyst promotes the mineralization of the decomposition product. Thus, the OH radicals from the O3MBs competitively captured in the decomposition product strongly promote the decomposition of IPA, enhancing the IPA decomposition rate.