金屬有機框架（metal-organic frameworks， MOFs）與半導體材料所組成的複合型光觸媒，由於能透過協同效應提升光催化效能而受到廣泛關注。過去研究已成功證明如UiO-66/TiO₂（U/T）與UiO-66-NH₂/TiO₂（UN/T）等光觸媒具有優異的性能。本研究聚焦於反蛋白石結構TiO₂（inverse opal TiO₂， IOT）與UiO-66及UiO-66-NH₂的複合材料。IOT的高度有序結構可產生慢光效應（slow light effect），預期能增強光的捕捉與利用效率，進而提升光催化表現。 本研究以原位點生長法（in situ method）合成UiO-66/IOT（U/IOT）與UiO-66-NH₂/IOT（UN/IOT）複合材料。利用傅立葉轉換紅外光譜（FTIR）與X光繞射（XRD）分別析其化學鍵結與結晶性，並以氮氣吸附－脫附等溫線測定比表面積與孔徑分佈。光催化性能則透過可見光下亞甲基藍（methylene blue， MB）之光降解實驗進行評估。結果顯示，U/IOT具有極佳的光催化活性，明顯優於U/T；相對地，UN/IOT在初期即快速去除MB，顯示吸附作用在該系統中扮演較主導的角色。 為進一步釐清反應機制，本研究利用UPS與UV-vis DRS建立能帶結構，並以EPR偵測超氧自由基（•O₂⁻）與氫氧自由基（•OH）。綜合分析結果後，提出U/T與U/IOT屬於TypeⅠ異質接面機制，而UN/T與UN/IOT則屬於TypeⅡ異質接面機制。研究結果指出，相較於傳統TiO₂，IOT結構在光捕捉方面具有優勢；然而，這兩類異質接面雖能促進光生電荷載子的分離，卻同時降低了氧化還原能力。上述結果凸顯了在設計光觸媒時，平衡電荷分離效率與氧化還原電位的重要性，並為未來UiO-66/IOT系列光觸媒的設計提供新的見解。;Composite photocatalysts combining metal-organic frameworks (MOFs) with semiconductor materials have attracted considerable attention for their potential to enhance photocatalytic performance via synergistic effects. Prior research has successfully demonstrated the excellent performance of photocatalysts such as UiO-66/TiO₂ (U/T) and UiO-66-NH₂/TiO₂ (UN/T). This study focuses on the composite of inverse opal TiO₂ (IOT) with UiO-66 and UiO-66-NH₂. The well-ordered structure of IOT generates slow light effect， which is expected to enhance light harvesting and utilization， leading to improved photocatalytic performance. UiO-66/IOT (U/IOT) and UiO-66-NH₂/IOT (UN/IOT) composites were synthesized via an in situ method. Characterization was conducted using FTIR and XRD to investigate chemical bonding and crystallinity， respectively， while N₂ adsorption-desorption isotherms were utilized to determine the surface area and pore size distribution. Photocatalytic performance was evaluated through methylene blue (MB) photodegradation under visible light. Results showed that U/IOT exhibited outstanding photocatalytic activity， significantly outperforming U/T. In contrast， UN/IOT showed a rapid initial removal of MB， indicating that adsorption played a more dominant role in the process. To clarify mechanisms， band structures were constructed via UPS and UV-vis DRS， while EPR detected •O₂⁻ and •OH radicals. Based on these comprehensive results， TypeⅠheterojunctions mechanisms are proposed for U/T and U/IOT， whereas TypeⅡ mechanisms are proposed for UN/T and UN/IOT. The findings suggest the IOT structure provides a light harvesting advantage over traditional TiO₂. However， both heterojunctions decrease redox ability while separating photogenerated charge carriers. These results highlight the importance of balancing charge separation with redox potential， offering new insights for the future design of UiO-66/IOT-based photocatalysts.
