| Summary: | 碩士 === 國立中興大學 === 化學工程學系所 === 100 === Hydrogen is a source of clean energy. The photocatalyst has been applied to water splitting generate hydrogen when it is activated by the light. Many studies have investigated the photocatalysis, and the most extensive photocatalyst is titanium oxide(TiO2). Due to its photo-electrochemical stability, non-toxicity, and low cost for fabrication. High surface area TiO2 and highly ordered TiO2 nanotubes can enhance the photocatalysis activity, and lead to a potential application for hydrogen generation application from photo electrochemical cell.
This study will synthesize Bamboo-type TiO2 nanotube array by alternating voltage system under the anodization method. To achieve the highly order Bamboo-type TiO2 nanotube array, the high voltage system in alternating voltage condition, anodization time, calcinations temperature and switch of voltage have been effectively controlled. Studying the structural properties of the highly order Bamboo-type TiO2 nanotube array has used the instructments of Field Emission Scanning Electron Microscope(FE-SEM), X-ray Diffraction Spectrometer(XRD), Electrochemical Chromatography, and Gas Chromatography(GC). The Bamboo-type TiO2 nanotube arrays have the higher surface area than the tranditional TiO2 nanotube arrays, it could enhance the photocatalytic activity. The photoconversion efficiency of Bamboo-type TiO2 nanotube array achieves 15.04%.
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