本研究使用金屬改質二氧化鈦濾網，進行光催化降解臭氧以及丙二醇甲醚醋酸酯之反應，分別探討不同金屬改質、觸媒量等條件對於光催化速率的影響。本研究中應用含浸法製備二氧化鈦濾網。使用螢光光譜儀(PL)、X-ray光電子能譜儀(XPS)分析觸媒表面，以及傅立葉紅外線光譜儀(FTIR) 與氣相層析質譜儀(GC-MS)分析氣相中間產物。實驗結果顯示鈀的添加比例為1 mol %時，其對於整體臭氧有最好的去除活性，因鈀金屬本身即具優異催化效果，並可有效降低電子電洞再結合速率。
在反應動力學部份中，以Langmuir-Hinshelwood model為依據，改變不同反應參數可推導出合理的反應動力學模式。進一步探討在不同紫外線光源(UVA、UVC以及VUV)激發下的光催化反應，比較不同光源所產生的能量對於臭氧以及丙二醇甲醚醋酸酯轉化率之影響。
實驗結果顯示應用鈀改質觸媒在滯留時間0.43 min、UVA紫外光強度為2.75 mW/cm2時可以達到87 %以上的臭氧去除率；丙二醇甲醚醋酸酯應用錳改質觸媒在滯留時間1.1 min、VUV紫外光強度為5 mW/cm2時可達成66 %的去除效果，顯示本研究製備濾網具有降解污染氣體之應用潛力。

In this work, the photocatalytic degradation of gaseous ozone and propylene glycol monomethyl ether acetate (PGMEA) over metal-modified TiO2 filter under UV illumination in a continuous flow reaction was investigated in detail. The effects of kind of metal, amount of metal, and amount of titanium on photocatalytic reaction rate were studied to obtain the most reactive catalyst. The metal-modified ceramic filter was prepared in a dip coating process using the metal-containing titania sol. The surface physical properties of photocatalytic filter were analyzed by photoluminescence and X-ray photoelectron spectra, respectively. The reaction intermediates were determined by Fourier transform infrared spectrometer and gas chromatography–mass spectrometry. The results indicated that the photocatalytic filter with 1 mol% Pd exhibits best activity, result from the metal of Pd has a catalytic property for ozone degradation and it can also reduce the electron-hole recombination rate.
In the kinetic part, a rational reaction mechanism was satisfactorily developed by using Langmuir-Hinshelwood model and CSTR design equation. Several reactions factors were studied to obtain the kinetic parameters. The photocatalytic reactions were further carried out under different UV illuminations (UVA, UVC, and VUV) to clarify the effect of wavelength on degradation of ozone and PGMEA.
87% of conversion for ozone over Pd-modified photocatalyst in this system was achieved with a retention time of 0.43 min and UVA intensity at 2.75mW/cm2. On the other hand, the 66% of PGMEA was degraded over Mn-modified filter with a retention time of 1.1 min and VUV intensity at 5mW/cm2. The result showed the prepared material can be applied as effective filter for air purification system.

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