研究生: |
梁翌珊 |
---|---|
論文名稱: |
以水溶液沈澱法製備不同形貌之氧化鋅 Preparation of Various Morphology Zinc Oxide by Solution Precipitation Methods |
指導教授: | 江慧真 |
口試委員: | |
學位類別: |
碩士 Master |
系所名稱: |
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論文出版年: | 2009 |
畢業學年度: | 97 |
語文別: | 中文 |
論文頁數: | 80 |
中文關鍵詞: | 醋酸鋅 、尿素 、均勻沈澱法 、氧化鋅 、配位基 |
外文關鍵詞: | zinc acetate, urea, homogeneous precipitation, zinc oxide, ligand |
相關次數: | 點閱:3 下載:0 |
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本實驗以水溶液沈澱法在80℃下反應30分鐘製備出氧化鋅粒子,以醋酸鋅作為Zn2+的來源,以尿素作為鹼源與醋酸鋅反應生成氧化鋅並加入六亞甲基四胺、六亞甲基亞胺、乙二胺、氨水及乙二胺四醋酸四鈉鹽五種配位基,改變濃度、反應時間及反應溫度,製備出不同形貌的氧化鋅粒子-柱狀、紡錘狀、中空球狀、花瓣狀、層狀等粒子形狀。由XRD檢測確定製備出的氧化鋅為Hexagonal結構,晶粒大小在25nm~80nm之間。由PL檢測以325nm的波長激發,在400nm及550nm可見到紫光及綠光的放射峰,發光效率以乙二胺四醋酸四鈉鹽與尿素、醋酸鋅生成的氧化鋅效果最好,發光強度隨著醋酸鋅濃度加大而增加。
ZnO particles were prepared via an aqueous solution precipitation routes at temperature below 80℃ for 30min. Zinc acetate is the source of zinc which react with urea, the alkaline source,and five ligands: (CH2)6N4,(CH2)6NH ,C2H8N2,NH4OH and EDTA, were added to produce ZnO. By controlling the concentrations of zinc acetate, reaction time and temperature, various morphologies of ZnO particles were achieved: rod-shaped, spindle-shaped, hollow spherical, flower-like and laminar. The Hexagonal structure of ZnO powders with crystal size between 25 and 80 nm were determined by X-ray diffraction. The photoluminescence (PL) spectrum of ZnO was measured at an excitation wavelength of 325 nm that exhibited emission peak at 400nm and 550nm.The photoluminescence efficiency of ZnO from EDTA, urea and zinc acetate are better and the intensity increases with the increasing zinc acetate concentration.
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