| Summary: | 碩士 === 中原大學 === 化學研究所 === 102 === 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.
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