本研究將奈米光觸媒二氧化鈦塗佈於磁磚表面，形成一層厚度很薄的薄膜，並且將磁磚直立放置在大樓屋頂牆面，監測自然環境對其耐久性影響。主要試驗分為室內及室外兩部份，一、室內部份：研究其初始光觸媒薄膜之各種基本功能性質，以了解不同試品間分解污染物能力（亞甲基藍來模擬有機污染物）及水滴接觸角變化的差異性，並使用快速UV試驗箱加速模擬室外環境造成的影響;以及重複污染試驗，重複噴塗污染物，研究在環境長期不雨狀況下，光觸媒磁磚分解污染物的能力。二、室外部分：研究自然環境對實際試品耐久性分析，屏除以往侷限於實驗室內研究範疇，進一步把光觸媒磁磚置於戶外自然環境中，了解實際上工程應用時類似產品所遇到的問題。以發揮工程施工品質及探討光觸媒實際應用時長期功能的變化。
研究結果顯示，研究發現實驗室塗佈 含量為15%之試品於各項研究評比中，其整體性能良好，雖未經燒結製成，但已可以與已燒結之光觸媒試品達到相近的功能與耐久性。各試品在耐酸鹼鹽性能中，耐酸性普遍不佳。室外耐候性試驗中，在研究期間內之試品色差與接觸角變化沒有明顯的正相關，甚至某些試品在接觸角檢驗中，照光前已具有非常低接觸角之結果，所以推論造成其擁有低接觸角結果不全然為光觸媒之原因，且光觸媒磁磚試品其色差分解功能預測耐久性與接觸角功能預測耐久性可分開探討。

In this research, nano photocatalyst were used on the surface of brick tiles which forms a thin membrane. Furthermore, the brick tiles were placed vertically on the top of the building to test the durability under the influence of the natural factors. The experiment was proceeded in two different settings---indoor and outdoor. In indoor settings, basic properties of initial photocatalyst membrance were explored to differentiate the pollutant ability of decomposition between different products(by using methylene blue to simulate organic pollution), the difference under the change of contacting angle of the water droplet as well. Moreover, UV testing machine was used to imitate the outdoor setting. By doing pollution testing and spraying the methylene blue repeatedly, the decomposed ability of the photocatalyst was under investigation.
The result shows that the brick tiles with 15% photocatalyst on the surface are better than the others in durability. Generally, acid resistance of each product is not good in the tests like H2SO4, Na2CO3, and NaCl. In outdoor setting, the relationship between the color difference and the change of contacting angle is not closely related. Some samples even present lower contacting angle before being lightened. In other words, photocatlyst doesn’t definitely lead to the change of contacing angle. Furthermore, the function of decomposition and contacting angle would be discussed separately.

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