Preparation and Characterization of TiO2-Coated Optical-Fiber in a Photo Reactor

本研究設計並組裝一個光纖式光反應器，可將光能均勻地分散到反應器的內部，以達成比傳統固定床式反應器更高的效率。TiO2以浸鍍法覆膜於石英光纖上，TiO2溶液是從鈦四丁基醇以熱水解法製得，另外也使用兩種商用Hombikat XXS100溶液和Degussa P25懸浮液作爲比較。TiO2覆膜在空氧中煆燒500℃後，以SEM觀察其厚度在60-600 nm之間，顆粒大小在15-25 nm之間。XRD圖譜顯示全部TiO2膜爲anatase晶相。平板玻璃的TiO2覆膜以膜厚儀和ASTM D3359測試法檢測覆膜附著力，結果使用熱水解法和Hombikat XXS100溶液的TiO2膜，相當均勻並具良好的附著力，但Degussa P25懸浮液的TiO2膜則呈現不佳的附著力。TiO2膜以UV光照射30分鍾後，其水接觸角降至接近0度，而後在暗室中又逐漸復原至初始的水接觸角，顯示TiO2膜的超親水性和表面完整性。以氨的光分解反應用於測試光纖光反應器，結果顯示TiO2覆膜光纖具有良好的光催化活性。

關鍵字

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並列摘要

An optical-fiber photo reactor (OFPR) was designed and assembled to provide uniform light distribution inside the reactor, which spread light energy more efficiently than a traditional fixed-bed reactor. TiO2 films were coated on optical fibers using the dip-coating method. Titania solutions were prepared through the thermal hydrolysis of titanium butoxide, commercial Hombikat XXS100 solution, and Degussa P25 suspension for comparison. The thicknesses of the films ranged from 60 to 600 nm after calcination at 500℃, and the sizes of the nanocrystals in the TiO2 films were 15-25 nm, as estimated from SEM micrographs. Anatase phase was found from the XRD patterns in all the TiO2 films. The profilemeter and ASTM D3359 adhesion test results showed that uniform TiO2 films were formed with strong adhesion using the thermal hydrolysis and Hombikat XXS100 solutions, while those coated with P25-suspension exhibited poor adhesion on a glass surface. The contact angle of the water decreased to almost zero within 30 minutes under UV-light irradiation and then recovered to the initial contact angle in darkness, implying super hydrophilicity and perfection of the TiO2 films. Ammonia was photocatalytically decomposed in the OFPR under artificial light irradiation, indicating good photocatalytic reactivity of the TiO2-coated fibers.

並列關鍵字

Photocatalysis ； Titania ； Film coating ； Optical-fiber photo reactor

被引用紀錄

陳柏任（2015）。銅負載二氧化鈦在雙胞反應器進行光催化還原二氧化碳〔碩士論文，國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342/NTU.2015.02825

陳鈞振（2012）。奈米金之侷域性表面電漿共振效應對光催化反應之研究〔博士論文，國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342/NTU.2012.03030

Chang, C. Y. (2012). 反應器與電子電漿共振於光觸媒之分析與應用 [doctoral dissertation, National Taiwan University]. Airiti Library. https://doi.org/10.6342/NTU.2012.00373

CHang, C. Y. (2007). 旋轉反應器在光觸媒的應用之製程特性與規模放大 [master's thesis, National Taiwan University]. Airiti Library. https://doi.org/10.6342/NTU.2007.00824

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Preparation and Characterization of TiO2-Coated Optical-Fiber in a Photo Reactor

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