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標題: | 溶凝膠法InTaO4於光纖反應器進行CO2光催化還原 CO2 photoreduction using sol-gel prepared InTaO4 in optical-fiber reactor |
作者: | Zhen-Yi Wang 王振益 |
指導教授: | 吳紀聖(Jeffrey Chi-Sheng Wu) |
關鍵字: | 銦鉭光觸媒,二氧化碳,光催化還原,光纖反應器,溶凝膠法,甲醇, NiO-InTaO4,photocatalyst,CO2,carbon dioxide,photoreduction,photo reduction,optical-fiber reactor,sol-gel method,methanol, |
出版年 : | 2008 |
學位: | 碩士 |
摘要: | 本研究使用InTaO4可見光光觸媒進行二氧化碳還原反應,以解決二氧化碳溫室氣體問題並產生再生燃料。InTaO4可以吸收可見光,有利於利用太陽光能,實驗是在氣相中進行光催化反應,利用溶凝膠法製備一系列銦鉭溶膠並負載NiO共觸媒,以浸漬覆膜法覆膜在光纖上鍛燒而成。由SEM照片可見一層薄膜覆蓋在光纖上。同一批溶膠鍛燒後的觸媒粉末,由UV-VIS圖譜可見InTaO4粉體可吸收至可見光波長,負載鎳的觸媒亦然。X光繞射圖譜顯示觸媒在1100°C鍛燒溫度為InTaO4晶相。在光纖反應器內置入216根覆膜光纖,以100W可見光鹵素燈照射,通入二氧化碳及飽和水汽反應物,進行氣相光催化還原反應,並以GC/FID層析儀分析出主要產物為甲醇和少量碳氫化合物。反應在25°C的產率為11.05μmol/g-hr,表示NiO/InTaO4光觸媒在低溫下對CO2還原反應即有良好的催化效果。而溫度提高到75°C後產率上升到20.47μmol/g-hr,表示觸媒若應用在太陽光照射的反應,也能利用陽光帶來的熱增加反應產率。實際利用太陽光做反應產率也達到11.30μmol/g-hr,與人工光源有相似的產率。 CO2 reduction was investigated in this work using InTaO4 visible light photocatalyst to solve the greenhouse effects of CO2 and to produce renewable energy. InTaO4 is able to absorb visible light and allow the use of solar energy. The gas phase photo reduction was observed over a series of InTaO4 and NiO loaded catalyst prepared by the sol-gel method, thereafter catalysts were dip coated on optical fibers and calcined. SEM micrographs show a thin film coated on the optical fiber. The UV-VIS spectra of powdered InTaO4 as well as NiO loaded catalysts prepared via the same procedure indicate that both catalysts absorb visible light. XRD results of catalysts calcined at 1100°C show the crystallinity of InTaO4. A photoreactor with 216 optical fibers and 100W halogen visible light source was used in the photo-reduction of CO2. The production of methanol and traces other hydrocarbons were detected by GC/FID. The production rate of methanol at 25°C was 11.05μmol/g-hr, indicating that NiO/InTaO4 photocatalyst is able to reduce CO2 at low temperature. Increasing the reaction temperature to 75°C increases the production rate to 20.97 μmol/g-hr. This suggests that if solar energy is used, the heat from sunlight may also increase the production rate. Using solar energy, the production rate was 11.30μmol/g-hr which is comparable to the result using artificial visible light. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/9019 |
全文授權: | 同意授權(全球公開) |
顯示於系所單位: | 化學工程學系 |
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