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標題: 利用常壓電漿和高壓鍛燒法製備含氮摻雜二氧化鈦光觸媒降解異丙醇之研究
Preparation of N-Doped TiO2 Photocatalysts by Atmospheric Pressure Plasma and High Pressure Annealing Method for 2-Propanol Degradation
作者: 林志遠
Lin, Chih-Yuan
關鍵字: N-doped titanium dioxid;含氮二氧化鈦可見光觸媒;visible light;photocatalysts;常壓電漿;鍛燒
出版社: 環境工程學系所
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Davanzo, “Sol-Gel Titanium Dioxide Thin Films on Platinum Substrates: Preparation and Characterization,” Journal of Electroanalytical Chemistry, Vol. 544, pp. 47-57 (2003). 41. 張君正、張木彬,以介電質放電法處理揮發性有機物之研究,第十一屆空氣污染控制技術研討會論文集,第344-351頁 (1994). 42. 吳偉宏,奈米TiO2光觸媒粉體與超親水性薄膜之低溫製備與特性分析,國立臺灣大學化學工程學研究所碩士論文,台北 (2002). 43. 曾郁茗,以含氮氣體於常溫常壓電漿輔助程序製造可見光及紫外光觸媒研究,國立交通大學環境工程研究所碩士論文,新竹 (2005).
本研究主要探討自製的含氮二氧化鈦可見光觸媒之特性及其降解異丙醇的效率,研究方法係利用平板式常壓電漿反應器製備含氮摻雜二氧化鈦奈米微粒,在不同電壓下生成不同粒徑之奈米微粒粉末,再經過1至7 Bar不同高壓氮氣中鍛燒後完成觸媒製作,然後分析觸媒微粒之粒徑、摻雜氮之含量及觸媒晶相特性,最後利用製備的觸媒進行對異丙醇降解效率之研究。
研究結果顯示,常壓電漿反應器在10~20 kV交流電電壓、頻率60 Hz運作產生觸媒,經由TEM、SEM圖量測到觸媒顆粒粒徑20~30 nm,並且在不同壓力之鍛燒情形中觸媒顆粒不會變形。利用ESCA儀器量測到觸媒有氮原子鍵能存在,約為400 eV。在高壓氮氣鍛燒觸媒,可發現到氮氣壓力提升有助於觸媒對異丙醇降解速率增加,以壓力5 Bar溫度500 ℃製備完成觸媒有最佳降解效果,其一階反應速率常數為0.44 hr-1,此研究結果證實氮摻雜二氧化鈦在可見光亦可有效降解異丙醇氣體污染物。

This study mainly investigated the characteristics of N-doped titanium dioxide photocatalysts and their efficiency on reducing 2-propanol. A Atmospheric Pressure-Plasma Reactor was used to produce nano-photocatalysts with various voltages. The produced catalysts were annealed in nitrogen which pressures varied from 1 to 7 bar. The size of nanoparticles、the N atom concentrations and the crystallization of the catalyst were then further analysed. Finally these photocatalysts were used to investigated the destruct efficiency of 2-propanol.
Scanning and transmission electron (SEM and TEM) micrographs revealed nanoparticle sizes ranging from 20 to 30 nm in operating 10 to 20 kV AC. Particle shapes were not deformed by pressure. Electron spectroscopy for chmical analysis (ESCA) revealed the bond energy of nitrogen atom in the photocatalysts to be 400 eV. N-doped titanium dioxide particles annealed under higher pressures of nitrogen were found to improve the efficiency of 2-propanol destruction. The rate constant of 2-pronanol degradation under visible light was approximately 0.44 hr-1 when using the 5 bar/ 500 ℃ photocatalyst. We conclude that N-doped titanium dioxide nanoparticles can act as effective catalysts and significantly improve the efficiency with which the gaseous pollutant 2-propanol can be resolved under visible light.
其他識別: U0005-0108200700154000
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