本研究應用二氧化鈦（TiO2） 奈米粒子在廢水和揮發性有機化合物（VOCs） 煙氣處理設備. 利用異丙醇鈦為前驅體，成功合成了二氧化鈦（TiO2）光催化氧化應用納米粒子. 通過浸塗將此納米顆粒塗覆到金屬基材上. 本研究分析及改進了塗層均勻性，金屬基材上的粘附性和其他特性. 測量亞甲基藍(Methylene blue) 以及乙醛(acetaldehyde) 去除以評估二氧化鈦塗層的光催化活性.新塗覆的基材用於亞甲基藍去除，60％染料去除掉. 經過多次重複測量，這表明該催化劑中毒MB去除率減少到45％. 對於長期應用，催化劑需要清潔和再生，為實現穩定的VOC去除性能. 因此，開發並研究了一些催化劑再生技術. 新塗覆的基材除去高達99％的乙醛.通過適當的再生步驟中，去除效率在重複幾次之後維持在97.56％.本研究結果表明催化劑再生方法有助於降低催化劑表面劣化的影響，此可能是長期應用的主要挑戰.

In this study, the titanium dioxide (TiO2) nanoparticles were applied in wastewater and volatile organic compounds (VOCs) flue gas treatment equipment. TiO2 based nanoparticle for photocatalytic oxidation application were successfully synthesized using the titanium isopropoxide as precursor. These nanoparticles were coated to metal substrate through dip coating. The coating uniformity, adhesion on metallic substrate, and other characteristics were analyzed and improved. Methylene blue (MB) removal and acetaldehyde removal were measured to evaluate photocatalytic activity performance of the TiO2 coating. The freshly coated substrate was used for MB removal with 60% dye removal. However, MB removal rate were reduced to 45% after several measurement repetitions, which indicates the catalyst poisoning. For the long term application, the catalyst needs to be cleaned and regenerated in order to achieve stable VOCs removal performance. Thus, some catalyst regeneration techniques were developed and studied thoroughly. The freshly coated substrate removed up to 99% of acetaldehyde. Through a proper regeneration step, the removal efficiency was maintained at 97.56% after several repetitions. This result showed that catalyst regeneration method helps reduce the effects of catalyst surface deterioration which can be a major challenge for long term application.

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