本論文主要探討二氧化鈰與溴化銀複合材料透過紫外光照射及摻雜元素後
的催化活性 。對此複合材料進行三種方式改質 ，第一種為紫外照光 ，包含先對二
氧化鈰照UV 光再合成溴化銀 ，及整個複合材料照UV 光 ；第二種為二氧化鈰摻
雜銅元素與溴化銀之複合材料；第三種為二氧化鈰摻雜銅元素加上紫外照光。
在研究過程中 ，首先利用水熱法製備二氧化鈰 ，接著以沉澱法合成溴化銀 ，
利用X 光繞射分析儀(X-ray Diffraction)及X 光近邊吸收精細結構(X-ray
Absorption Near Edge Structure)證實還原銀的存在；使用掃描式電子顯微鏡
(Scanning Electron Microscope)及穿透式電子顯微鏡(Transmission Electron
Microscope)觀察複合材料之微觀形貌；由能量散射X 射線譜(Energy Dispersive
X-rays Spectroscopy)確認材料中銅 、鈰 、氧 、銀 、溴元素皆是均勻分布 ；利用紫外光至可見光光譜儀(Ultraviolet-visible spectroscopy)獲得能隙值及降解效率 ，探討光催化劑之催化活性。
本論文歸納出，摻雜銅莫爾濃度1%的二氧化鈰經過紫外照光後再合成溴化銀具有較高的光催化活性。並且要避免溴化銀還原過多的銀，以及產生適量的氧空位濃度，才能提高催化活性。

This research primarily investigates the catalytic activity of a cerium oxide(CeO2) and silver bromide (AgBr) composite material under ultraviolet (UV) irradiation and elemental doping. The composite material was modified using three methods: first, UV irradiation, which involved either UV exposure of CeO2 before AgBr synthesis or UV irradiation of the entire composite; second, a composite of copper-doped CeO2 and AgBr; and third, a combination of copper-doped CeO2 with UV irradiation.
In this study, X-ray Diffraction (XRD) and X-ray Absorption Near Edge
Structure (XANES) analyses were used to confirm the presence of reduced silver.The microstructure of the composite material was examined through Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). Energy Dispersive X-ray Spectroscopy (EDS) verified the uniform distribution of copper, cerium, oxygen, silver, and bromine elements within the material. Ultraviolet-visible spectroscopy (UV-Vis) was employed to determine the band gap values and degradation efficiency, exploring the catalytic activity of the
photocatalyst.
This research concludes that copper (1 mol%) doped cerium oxide, followed by UV irradiation prior to silver bromide synthesis, exhibits higher photocatalytic activity. To enhance catalytic activity, it is essential to avoid excessive reduction of silver in silver bromide and to achieve an appropriate concentration of oxygen vacancies.

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