2003-08-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/687082摘要：本計畫擬研發一種新型迷你光纖反應器進行兩種氣相光催化反應，第一年進行氣相光催化還原CO2生產碳氫化合物，具有再生能源和降低CO2的優點。第二年研究直接光催化分解氧化氮(NOX)成為N2和O2，具有不須加還原劑的優點，解決大氣層中NOX污染。先前之研究結果己顯示使用負載銅的二氧化鈦(Cu/TiO2)為觸媒，分散在水溶液以紫外光照射進行反應，可將CO2轉成甲醇，產量達到了最高值313 μmole/g，在1.98 wt% Cu/TiO2觸媒的光能效率(photo-energy efficiency)最高達到約2.5%，光量子效率(quantum efficiency)約10%。兩年將進行(a)使用溶凝膠法添加過渡金屬於TiO2，製備高效可見光應答觸媒；(b)製備薄膜型光觸媒及披覆在光纖表面技術，組裝於迷你光纖反應器；(c)氣相CO2還原反應，探討二氧化碳還原反應最佳條件，建立高光量子效率之反應條件與光觸媒特性之關連性；(d)直接光催化分解氧化氮(NOX)成為N2和O2，探求NO分解反應最佳條件；(e)從實驗探討氣相光催反應機理，推導反應動力式。從技術角度、經濟層面或環保的觀點，本計畫發展出光<br> Abstract: This research proposes a novel optical-fiber mini-reactor to carry out two vapor-phase photocatalytic reactions. The vapor-phase photoreduction of CO2 to hydrocarbons will be studied in year 1, which has advantages of renewable energy and CO2 abatement. The direct photo-decomposition of NOX to N2 and O2 will be investigated in year 2, which requires no reducing agent to remove NOX pollution in atmosphere. The CO2 photo-reduction was performed in aqueous solution using TiO2 supported copper catalysts previously. The reaction converted CO2 into methanol under UV irradiation. Maximum methanol yield achieved 313 μmole/g. The experimental result indicated that 1.98 wt% Cu/TiO2 gave the highest photo-energy efficiency of ~2.5%, and quantum efficiency of ~10%. This 2-year project plans to (a) prepare visible-light-response TiO2 catalysts incorporated transition-metal via sol-gel route; (b) coat photocatalyst on a thin-film and on optical fibers, then assembly an optical-fiber mini-reactor; (c) investigate the optimal conditions of vapor-phase CO2 photoreduction, and correlate the high quantum efficiency and characteristics of photocatalyst; (d) search the optimal conditions of NOx photo-decomposition into N2 and O2; (e) establish a mechanism of photocatalysis in vapor phase and conduct a reaction kinetic model. From the perspective of technology, economy and environment, an optical-fiber reactor can apply to reduce CO2 for renewable energy, and to remove NOx pollutant in atmosphere. It is feasible and worth to explore.二氧化碳氧化氮再生能源光催化還原光催化分解二氧化鈦觸媒CO2NOXrenewable energyphotoreductionphoto-decompositionTiO2 catalyst. CO2NOXrenewable energyphotoreductionphoto-decompositionTiO2 catalyst. CO2NOxrenewable energyphotoreductionphoto-decompositionTiO2 catalyst