| 研究生: |
陳皇翰 Chen, Huang-Han |
|---|---|
| 論文名稱: |
利用可見光探討銀沉積於奈米氧化鋅的
光催化活性 The photocatalytic activities of silver doped ZnO nanoparticles under visible light irradiation |
| 指導教授: |
黃守仁
Whang, Thou-Jen |
| 學位類別: |
碩士 Master |
| 系所名稱: |
理學院 - 化學系 Department of Chemistry |
| 論文出版年: | 2005 |
| 畢業學年度: | 93 |
| 語文別: | 中文 |
| 論文頁數: | 107 |
| 中文關鍵詞: | 氧化鋅 |
| 外文關鍵詞: | zinc oxide |
| 相關次數: | 點閱:82 下載:4 |
| 分享至: |
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本研究針對光催化之觸媒進行性質上的改良。以石榴石釹雷射製備出比市售氧化鋅(~28.9 nm)更小的光觸媒粉體(~16.7 nm)以及銀沉積於氧化鋅上的光觸媒,並將它們應用於在可見光下對降解甲基藍的研究。這些光觸媒藉由XRD、UV-Vis、TEM、SEM、EDS和SAED被鑑定。在光催化降解甲基藍的結果中,發現在pH=11的系統裡,2%Ag/ZnO光觸媒在可見光燈的照射下是最高效率去完成甲基藍的光降解。但是在更多含量的銀下對光降解效率而言卻是有害的。
The objective of this study is to increase the photocatalytic activity of semiconductor photocatalysts. The ZnO photocatalysts(~16.7 nm) made by Nd:YAG Laser are smaller than commercial zinc oxide(~28.9 nm). The silver doped ZnO photocatalysts were made by Nd:YAG Laser and research in photodegradation under visible light irradiation. The photocatalysts were characterized by XRD, UV-Vis, TEM, SEM, EDS and SAED. In the results of photocatalysis, it was found in pH=11 that the 2% Ag content was optimum to achieve the highest efficiency of the methylene blue photodegradation under visible light irradiation. But more Ag content was detrimental to the photodegradation efficiency.
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