Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/3106
標題: 氧化鉍修飾二氧化鈦光觸媒及其在可見光下之光催化應用
TiO2 photocatalyst modified by Bi2O3 and its photocatalytic application under visible light
作者: 林峙妙
Lin, Chih-Miao
關鍵字: Bi2O3修飾TiO2光觸媒;Bi2O3 modified TiO2 photocatalytic;水熱法;甲基橙;光催化;可見光;hydrothermal method;methyl orange;photocatalysis;visible light
出版社: 化學工程學系所
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摘要: 
本研究以直接水解法結合水熱處理成功製備出Bi2O3/TiO2複合奈米光觸媒,探討Bi/Ti莫耳比例、水熱溫度、水熱時間、鍛燒溫度和鍛燒時間的製備條件對觸媒的影響,以及利用光催化反應效能找出製備Bi2O3/TiO2光觸媒最適化條件。所使用的分析儀器包括XRD、SEM、TEM、BET及UV-visble光譜儀,對奈米光觸媒之晶型結構、表面形貌進行特性分析。
由研究結果顯示Bi2O3/TiO2粒徑大小介於8 ~ 31 nm之間,比表面積介於81 ~ 180 m2/g之間,將所製備的Bi2O3/TiO2光觸媒於可見光照射下進行甲基橙的光分解實驗,並探討H2O2添加量對甲基橙光分解之影響。由降解甲基橙的結果得知,製備Bi2O3/TiO2最佳條件為1.0 mole % Bi/Ti、水熱處理溫度及時間分別為200°C及12小時,再鍛燒溫度為200°C處理0.5小時具有最佳可見光之光催化活性及其降解率可達61%,而H2O2最佳添加量為0.2 ml,可將光催化效率從61%提升至82%,因此可證明Bi2O3修飾TiO2能增加TiO2光觸媒之光催化活性 。

The modified photocatalyst Bi2O3/TiO2 has been synthesized by the combination of direct hydrolysis method and hydrothermal treatment. The investigated parameters include molar ratio of Bi/Ti content, hydrothermal temperature, hydrothermal time, calcination temperature and time. The characteristic analysis of the nanoparticles Bi2O3/TiO2 were performed by XRD、SEM、TEM、BET and UV-visble technigues.
The results show that the particle size of the prepared Bi2O3/TiO2 is from 8 nm to 31 nm, and the surface area of catalysts is between 81 m2/g to 180 m2/g. The photocatalytic activity was measured by the decomposition of methyl orange under the irradiation of common visible light. In addition, the effect of the addition of H2O2 on photocatalytic was also discussed. The best photocatalytic activity was reached to 61% with the Bi/Ti molar ratio of 1.0%, the hydrothermal temperature of 200°C, the hydrothermal time for 12h, the calcination temperature and time at 200°C and 0.5 h, respectively. The optimum volume of the added H2O2 was 0.2 ml. The photocatalytic efficiency has been increased from 61% to 82%. Thus, this study has demonstrated that the TiO2 modified by Bi2O3 can enhance the photocatalytic activity under visible light.
URI: http://hdl.handle.net/11455/3106
其他識別: U0005-0307201317554500
Appears in Collections:化學工程學系所

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