本實驗藉由二氧化鈦(TiO2)光觸媒之改質，一般不規則形狀TiO2奈米粒子，藉由本實驗特殊之製程方式改變其表面形貌，使之成長為介孔洞TiO2球珠形貌，其特色為大球珠本身為400~500 nm左右之奈米粒子，但是他卻是由20~30 nm的小的TiO2奈米粒子所聚集而成，此結構可以改善TiO2粉末之比表面積及電子電洞傳遞速度。除了表面形貌上之改質，更在TiO2晶格中摻雜N原子，以增進TiO2其在可見光下的吸收能力。再將改質完成後之氮摻雜介孔洞TiO2球珠應用於光降解實驗上。
本實驗是探討藉由快速的微波輔助水熱法去製備氮摻雜的介孔洞TiO2球珠粉末，藉由溶膠凝膠法先行製備出非晶相TiO2球珠，再藉由兩次微波水熱法去製備介孔洞TiO2球珠，第一次微波水熱時先控制TiO2表面形貌，第二次微波水熱時添加氮來源使不純物摻雜進入TiO2晶格中。
藉由X射線繞射儀和掃描式電子顯微鏡去分析其結晶結構和表面形貌，使用表面吸附儀測量改質後TiO2的比表面積，在使用可見光/紫外光光譜儀量測改質後TiO2在可見光下的吸收能力，及其改質後TiO2能帶之寬度，在表面化學鍵結分析可以確定是否具有氮摻雜入TiO2晶格，與氮摻雜於TiO2晶格之位置，最後在藉由將改質後TiO2溶於20 ppm亞甲基藍溶液中，測試其分解有機汙染物之能力。

This work reports the synthesis and characterization of N-doped TiO2 mesoporous beads prepared by a two-cycled rapid microwave-assisted hydrothermal method using three different types of nitrogen dopants: diaminohezane, triethylamine, urea. In the first cycle, TiO2 mesoporous beads with controlled structures were synthesized at 200 ℃. The obtained beads were then subjected to a second cycle of microwave-assistaed hydrothermal process for doping with one of the aforementioned dopants. The sue of the second cycle is to maintain the integrity of the beads, which otherwise would be easily destroyed if the synthesis and doping processes are carried out at the same time. The crystalline structure of the N-doped TiO2 was examinedusing X-ray diffraction. The surface state and structure were investigated using X-ray photoelectron spectroscopy and scanning electron microscopy, respectively. The absorption of N-doped TiO2 in the range of visible light was confirmed using UV-Vis spectroscopy. The self-assembled N-doped TiO2 red-shift in adsorption edge up to 420 nm. The obatined TiO2 was also dissloved in methyl blue solution to function photocatalyst and the catalytic activity was determined. The photocatalytic activity of all N-doped TiO2 can be found the N-doped TiO2 used dianimohexane as the nitrogen dopant decompose the organic pollution more complete and rapid than others .

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