氧化鈦薄膜之非均相光催化作用應用光致變色之研究

The Novel Photochromic Behavior: Using the Photocatalytic Effect of TiO2 Films to Synthesize Silver Nanoparticles

薛正德(Jeng-De Shiue)

指導教授 ： 黃景良

共同指導教授 ： 李明(Min Li)

崑山科技大學/工程學院/機械工程研究所/碩士(2008年)

摘要

現今先進國家在新穎薄膜變色機制Photochromic進行研發，其中二氧化鈦此物質被人們所注意，因為二氧化鈦不只能運用在光電而且在食品及環境工程皆有很大的貢獻。而本論文在玻璃上使用高溫燒結的方式燒結出二氧化鈦薄膜，後續經過浸泡硝酸銀水溶液，再透過302nm波長之紫外光線及可見光照射。此時在二氧化鈦薄膜上所殘留的奈米銀離子將受到紫外光的激發轉變成較大銀粒子且呈現棕灰色，穿透百分比降低，紫外光激發後接續使用可見光做還原照射，此時TiO2-Ag薄膜棕灰色也會因此消失，變回原本之顏色。由此可以證明TiO2-Ag薄膜可藉由可見光及紫外光的激發效能，讓薄膜具有可逆性的能力。這樣的技術可以更廣泛的使在用眼鏡及變色櫥窗等等的產品研發。

關鍵字

二氧化鈦 ； 硝酸銀 ； 可見光 ； 紫外光

並列摘要

A novel Photochromic TiO2 thin film is developed in this study. Titanium dioxide (TiO2) photo catalysts have attracted great attention as a material for sterilization in the food and environmental industry. We use the Sintering method to fabricate the TiO2 thin films on the glass and then immerge on the AgNO3 solution to dope Ag+. The Ag+-TiO2 thin film is reduced with light the 302nm UV light and oxidized with visible light. The strong photocatalytic effect of the crystal-TiO2 reduced Ag+ to Ag nanoparticles in nanoporous TiO2 films under UV light. When Ag nanoparticles grow massively, its color would transits to brownish-gray from transparent. During the visible light excitation, the brownish-gray color of the Ag-TiO2 film disappeared. The results demonstrated that the Ag-TiO2 film own the revertible ability between visible light and UV light. This technology can be widely used in optic filter, smart window and glasses. The detail would be reported in this study.

並列關鍵字

TiO2 ； AgNO3 ； UV light ； visible light

參考文獻

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