研發高效率光催化分解一直是光觸媒領域裡的重點。本論文研究在二氧化鈦表面上添加吸附劑藉以提高處理水中污染物質之效能。研究中分別以溼式化學沉澱法及溶膠凝膠法製備磷灰石(Apatite)與二氧化鈦二種複合式光觸媒，並探討各種變因對以這類光觸媒降解幾種污染物之影響。實驗中所降解之污染物有甲基藍、甲胺及丁酮，其中以甲基藍做為模式反應物探討其反應動力式。並由BET分析得知光觸媒粉體之孔徑分佈對光催化反應的影響。
在光分解甲基藍及甲胺的實驗中，我們發現固定TiO2(商用觸媒Anatase)之重量並改變Apatite的沉積量所製成Apatite/TiO2光觸媒中，在適當的條件下，有一最佳的重量比可獲得最好的光催化效率。在Degussa P-25 TiO2光觸媒上添加吸附劑反而會降低其對甲基藍之光降解效能。由甲基藍的實驗中，我們可以發現若將初始吸附之因素移除時，甲基藍之降解速率大致上符合擬一階反應動力式之假設。

In the field of photocatalysis it is an important object to search for high efficient catalyst for photodegradation. Therefore in this study, we investigated the effect of adding adsorbent onto titania surface on photo-degradation of pollutants in water. We used the wet chemical precipitate method to deposit apatite onto the commercial TiO2 to form apatite/TiO2, and the sol-gel method to prepare titania, and investigated the effects of various factors on the photocatalytic reaction. We chose methylene blue, methyl amine and methyl-ethyl ketone as the pollutants to be degradated. Methylene blus was used as a model reactant and its reaction kinetics was also investigated.
We found that when we used the Apatite/TiO2 catalysts having the same amount of TiO2(Merck) but different apatite loadings, there has an optimal weight ratio for gaining the best photocatalyzing efficiency under appropriate condition. We also found that the deposition of apatite on Degussa P-25 TiO2 photocatalyst would result in a reduction in its photoactivity. In the degradation experiment of methylene blue , we could find that if adsorption at initial stage is neglected, the degradation rate of methylene blue will roughly follow pseudo first order kinetics.

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