近年來由於環保意識之興起，使得光觸媒此一材料受到大家的重視。其中又以二氧化鈦以其泛用性高，格外受到研究者之關注。因此選擇二氧化鈦作為研究之材料。
然而作為光觸媒材料，最使人詬病為其能隙過大，使可見光利用率低落。在此研究共摻雜二氧化鈦，對能隙與結構之影響。以溶膠凝膠法製備樣品共摻雜樣品並且在氧氣下以500oC鍛燒。量測數據顯示鈷與鋯皆取代鈦的位置且樣品內沒有其他氧化物，並且共摻雜樣品之能隙隨鋯比例增加有著顯著上升。此結果比起一般常用之摻雜方式有著截然不同的機制存在。

Recently, photocatalytic materials have attracted special research interest due to heightened awareness of the importance of environmental protection. Among such materials, many research works have been focused on titanium dioxide for its wide and versatile catalytic applications. However, the low activity of these catalysts in applications using visible light has limited their further development. In this thesis, we investigated the effect of (Co,Zr) co-dopeing on the structures and band gap width of the doped TiO2 host. Samples were synthesized by a sol-gel method followed by thermal annealing at 500oC. The extended x-ray absorption fine structure (EXAFS) data show that both cobalt and zirconium substitute for Ti in the TiO2 host. The existence of metal oxides in the samples was also excluded by our data. Most importantly, the band gap of TiO2 decreases with increasing Zr concentration. The observed dependence of band gap on Zr concentration indicates a rather unique mechanism governing the band gap variation in these co-doped oxides.

摘要...........................................................I
ABSTRACT......................................................II
誌謝..........................................................III
目錄..........................................................IV
1-1 研究動機...................................................1
1-2 論文簡介...................................................2
第二章 文獻回顧.................................................3
2-1 二氧化鈦與摻雜元素..........................................3
2-2 光觸媒材料與機制簡介........................................4
第三章 實驗量測方式與原理簡介....................................6
3-1 拉曼光譜(RAMAN SPECTROSCOPY)...............................6
3-2 X光繞射 (X-RAY DIFFRACTION)................................7
3-3 延伸X光吸收細微結構 (EXTENDED X-RAY ABSORPTION FINE STRUCTURE : EXAFS).........................................................9
3-4 紫外-可見光光譜(ULTRAVIOLET-VISIBLE SPECTROSCOPY)..........11
3-5感應耦合電漿質譜儀 (INDUCTIVELY COUPLED PLASMA-MASS SPECTROMETER) ..............................................................12
第四章 樣品製備方法與流程.......................................13
4-1 溶膠凝膠法 (SOL-GEL).......................................13
4-2 樣品製作流程...............................................13
4-3 實驗方法比較................................................15
4-4 藥品.......................................................15
4-5 樣品代號...................................................16
第五章 實驗數據分析與結果討論....................................17
5-1 拉曼光譜 (RAMAN SPECTROSCOPY)..............................17
5-2 X光繞射 (X-RAY DIFFRACTION)................................20
5-3 延伸X光吸收細微結構與X光吸收邊緣結構.........................23
5-4 紫外-可見光光譜 (ULTRAVIOLET-VISIBLE SPECTROSCOPY)..........30
5-5 感應耦合電漿質譜儀 (INDUCTIVELY COUPLED PLASMA-MASS SPECTROMETER)..................................................32
第六章 結論.....................................................35
第七章 參考文獻..................................................36

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