本研究中以溶膠凝膠法製備一系列之二氧化鈰-二氧化鈦材料與含銀之二氧化鈰-二氧化鈦材料。除了藉由X光粉末繞射儀、穿透式電子顯微鏡、紫外-可見光光譜儀、原子力顯微鏡、掃描式電子顯微鏡與X光電子/歐傑電子能譜儀等儀器分析材料之性質之外，再以紫外光與可見光照射條件下，亞甲基藍降解來測試材料之光觸媒活性。藉由添加二氧化鈰後形成鈰-氧-鈦之鍵結改變二氧化鈦的吸收光譜能階，達到較高的光觸媒活性效能。將銀加在氧化鈦及氧化鈰氧化鈦上面，探討在抗菌應用方面，銀/二氧化鈰-二氧化鈦材料於照光條件下有抗菌功效，藉由大腸桿菌(Escherichia coli (OP50), 革蘭氏陰性細菌)與耐甲氧金黃色葡萄球菌 (methicillin-resistant Staphylococcus aureus (USA300), 革蘭氏陽性細菌)來進行銀/二氧化鈰-二氧化鈦系列材料抗菌活性測試。 ;A series of CeO2–TiO2 mixed oxides and anatase TiO2 co?doped with Ag and CeO2 (Ag/CeO2?TiO2) will be prepared by the peroxo sol-gel method. X-ray diffraction, transmission electron microscopy, UV–vis spectroscopy, atomic force microscopy, scanning electron microscopy and X-ray photoelectron spectroscopy will be used to investigate the characteristics of the as-prepared materials in order to determine the influence of adding CeO2 to TiO2 on the photocatalytic degradation of methylene blue aqueous solution under both UV and visible light irradiation. The high photocatalytic activity is expected to be becaused by the spectral absorption of material, which is attributed to the heterojunction formed by TiO2 and CeO2 networks via Ti–O–Ce bonds after addition of CeO2. Silver will be used to enhance antibacterial activity. The antibacterial activities of the samples will be tested against two different bacteria: Escherichia coli (OP50), a Gram-negative organism and methicillin-resistant Staphylococcus aureus (USA300), a Gram-positive organism.
