2026-11-092026-11-09https://scholars.csmu.edu.tw/handle/123456789/38779Photocatalytic reaction is one of the most important mechanisms of natural degradation in environment, especially in indirect photocatalytic reaction. The advantage of indirect photocatalytic reaction can be an efficient method with low equipment cost, no complicated operation processes, low energy consumption, and usage of solar energy. Titanium dioxide (TiO2) is a commonly used photocatalyst, and the defects of TiO2 are small specific BET surface and low catalytic activity. In theory of supported catalyst, effective diffusion coefficients of gaseous molecules are decided by the porous diameter of the catalyst supports, while gaseous catalytic reaction. In the present case, the raising of average pore size diameter results: (1) the diffusion of TiO2 precursors into the pores are improved during the catalyst preparation, and the active sites dispersion on the catalyst would be better; (2) the medium and small gaseous molecules were easily diffused into the pores to react with active sites, as a result the adsorption capacity of the catalyst was increases and the catalytic efficiency was enhanced. In this study, we mainly focuse on the preparation of various types of TiO2 photocatalysts, including titania nanotubes (TNT), TiO2/CNT, and TiO2/SBA-15, to increase the specific BET surface and improve their crystallinity. The activity tests over TiO2 photocatalysts would study in the different operating condition, including space velocity and composition of reaction gas (CO,NO, VOCs ), and the catalyst with the best performance and decay resistance would be picked up. In addition, the reaction mechanisms of photocatalytic reaction over photocatalysts, TNT, TiO2/CNT, and TiO2/SBA-15, would be studied. Characterization of catalyst would be done to find their effect on the catalytic activity by using the techniques BET, XRPD, EA, FESEM, EDS, TEM, ICPMS, and FTIR. Desirable objective of this research would be : (1) to establish the reaction parameters for preparing the titania nanotube TNT; (2) to obtain supported nanocrystalline catalysts (TNT, TiO2/CNT, and TiO2/SBA-15) with well-defined metal particle; (3) to develop the TiO2 catalysts with high catalytic activity for NO, CO and VOCs removal.光催化反應是污染物質於環境中自然降解的重要途徑，特別是藉由光感物質吸收日 照光能所進行的間接性光催化反應，其優點為處理效率高、操作設備小、操作程序簡單、 能源消耗少、可利用自然光等。二氧化鈦(TiO2)最常被使用的光觸媒，但卻有比表面積 小及低反應活性的缺點。就被擔持觸媒而言，氣體分子的有效擴散係數取決於擔體的孔 隙半徑，因此若能增加觸媒擔體的平均孔徑，將可: (1)提升觸媒製備過程中二氧化鈦於 孔洞內的擴散行為，提高活性相於擔體上的分散性; (2)增加反應用過程時對氣體分子的 吸附能力，使得中、大粒徑的氣體分子可以順利擴散至孔洞內與活性相進行催化反應， 進而提升觸媒的反應效率。因此，本研究將製備二氧化鈦奈米管TNT，TiO2/CNT 及 TiO2/SBA-15 等三種不同型態的二氧化鈦光觸媒,提升奈米線之結晶性質與比表面積。比 較TNT，TiO2/CNT，及TiO2/SBA-15 等三種觸媒之催化活性，探討氣體流率與氣體組 成(CO,NO, VOCs)等不同反應條件對氣狀污染物轉化反應之影響。對於TiO2 觸媒進行活 性測試，評估活性最佳並能抗活性衰退的觸媒，並建立不同型態光催化反應機制。並輔 以BET、XRPD、EA、FESEM、EDS、TEM、ICPMS、FTIR 等進行物化特性分析，以 找出影響觸媒活性的原因。 因此，本計畫預期目標有三：（1）建立TNT 光觸媒的製備參數；（2）獲得擁有均 勻尺寸及形狀的TNT，TiO2/CNT 及TiO2/SBA-15 觸媒；（3）二氧化鈦光觸媒淨化空氣 中污染物CO、NO 及有機物的可行性評估。二氧化鈦奈米管奈米碳管SBA-15 沸石二氧化鈦光催化反應失活TNTCNTSBA-15TiO2Photocatalytic reactionDecayProject