| Summary: | 碩士 === 國立清華大學 === 化學系 === 99 === In various applications of titania, we fabricate it to be a nanofibers thin film by electrospinning. In order to increase its absorption in the visible light, we use nanofibers loaded with noble metal nanoparticles and transform the characteristic of the precursor solution which used in the electrospinning process. Besides,we also electrospun silica nanofibers to be a template for coating titania shell on the surface. By controlling CVD process parameters, we can make this titania shell not only fine or bad crystalline but different thickness. To measure the photo-current response, we design a simple device made by ITO glass then we choose the laser and Xe lamp to be light source for a fixed or full wavelength photo-current measurement. By modifying the surface or transform the nature structure, we can get the titania with stronger absorption in the visible light range. In the visible light-photo current response, it was also easily to find the difference of titania fiber between with or without modifying.
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