硫化鎘改質二氧化鈦奈米管產氫之研究

The Study of Hydrogen Generation from CdS-Modified TiO2 Nanotubes

劉淑芬(Shu-Fen Liu)

指導教授 ： 王宏文

中原大學/理學院/化學研究所/碩士(2014年)

https://doi.org/10.6840/cycu201400888

摘要

利用陽極氧化法(Anodization) 將超純度鈦金屬板製備成二氧化鈦奈米管陣列(Titania Nanotube Arrays，TNA)。因二氧化鈦奈米管陣列具有高的表面積和連續的電子傳遞路徑，是良好的光催化材料，本研究以此基礎，利用硫化鎘(CdS)複合到二氧化鈦奈米管陣列上，探討複合對光催化活性之影響，並將其應用於光催化水解產氫的實驗上。
利用震盪化學浴沈積法(Chemical Bath Deposition, CBD) 將硫化鎘(CdS)均勻複合到二氧化鈦奈米管陣列 (Titania Nanotube Arrays, TNA)上，利用CdS具催化之活性的特性添加於TNA上。
為提升TNA的光電反應，將TNA浸泡在含有Cd2+和S2-的溶液中，循環5、10、15、20次，使CdS添加到TNA表面，可觀察到當浸泡次數越多，則表面顏色由淺黃色到較深的黃色，由CdS奈米粒子慢慢轉變為片狀羣組，其中以浸泡15次之所產生之光電流最佳，在降解亞甲基藍實驗中，比TNA-pure光催化效果更佳。

關鍵字

產氫 ； 硫化鎘 ； 二氧化鈦奈米管

並列摘要

Titanium oxide nanotube arrays (TNA) were fabricated from titanium foil by anodizing process. TNA was a good photocatalytic material because of its high surface area and continuous electron transfer path. This study focus on the materials of TNA, and modifications such as CdS modified TNA. The photochemical catalysis of water splitting experiments using above materials for hydrogen generation were investigated.

CdS sensitized TiO2 nanotube arrays (TNA) was fabricated by inserting CdS nanoparticles into TNA via ultrasonic-assisted chemical bath deposition, and its effect on photocatalytic properties and hydrogen generation rate were discussed in this study.

To enhance the optical response of TNA, TNA will be immersed in Cd2 + and S2-containing solution, 5,10,15,20 cycle times, CdS modified TNA was formed by the immersion method. When soaking in higher number of times, the surface color of TNA changed from light yellow to dark yellow. Immersion of TNA for 15 times in CdS solution generated 1.462 mA/cm2 photocurrent, compared to 0.075 mA/cm2 of TNA-pure increase of 21.9 times was obtained.

並列關鍵字

CdS ； TiO2 Nanotube ； Hydrogen Generation

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