東華大學博碩士論文全文系統(新版--pdf全文影像)
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Core-shell structure In2O3/Ba2In2O5 were synthesized by chemical impregnation method and solid state method In our research we discuss (1)different Ba/In mole ratio (2)different sinter temperature (3)different sinter time (4)different method (5)adding PVA influence of photocatalytic activity
Key word: chemical impregnation method, solid state method, methylene blue, photocatalyst

Core-shell structure calcium bismuth oxide photocatalysts prepared by chemical impregnation method. The result indicated adding HNO3 can promoted the reaction. From the different reaction temperature experiments, we found that in the 500℃and 550℃have the best photocatalysic activities. Reacted in the 550℃，generated special band structure due to the core-shell structure. It makes the electron-hole pairs separated well.
From the different reaction temperature and time experiments, when the reaction temperature in the 450℃, a lot of Bi5O7NO3 were formed, and it decomposed during the second reaction. Temperature is the main factor of the calcium bismuth oxide phase formation. In the same reaction temperature, its phase are the same, and the phase ratio are slight different.

Abstract
This research work aims at understanding of the growth mechanism for silver nanostructures by photoreduction of silver nitrate solution on multilayer In/CaIn2O4/In2O3 photocatalyst thin films. Different silver nanostructures were formed by various parameters. Under proper experimental condition, silver nanowires with 0.5-1μm in diameter and 100-1000μm in length were formed. The crystal structure and morphological structures were carefully characterized by field emission scanning electronic microscopy(FESEM), X-ray diffraction(XRD), and UV-visible photospectrometer.
Keywords: Photocatalyst、Silver nanowire、 CaIn2O4、In2O3、Photoreduction

Abstract :
Potassium tantalum oxide photocatalyst powders were synthesized by hydrothermal method and characterized by X-ray diffraction(XRD), transmission electron microscope(TEM) and UV-visible spectrometer. The photocatalytic activity was evaluated by photo-degradation methylene blue under UV-C light irradiation. Furthermore, study the properties of KTaO series photocatalyst powders by washed it before annealing or not, different temperature, different KOH concentration and annealing time and so on. The diffraction pattern will influenced by annealing temperatue of powder. The K2Ta4O11 crystal structure will be formed, if the powder is deficient the potassium ion in the surface and annealed to 700℃. The KTaO3 crystal structure will be formed at 900℃ and increased with the annealing temperature obviously. The KTaO3 ?single phase will be produced under sufficient potassium ion surrounding the powders surface.
Keyword: hydrothermal, photocatalytic, potassium tantalum oxide, phase transformation