電漿子材料對染料溶液的光催化降解之研究

Study of photocatalytic degradation of dye solutions using plasmonic materials

趙育新(Yu-Xin Zhao)

指導教授 ： 李世琛

中原大學/理學院/化學研究所/碩士(2014年)

https://doi.org/10.6840/cycu201400528

摘要

本論文為使用金屬氧化物 (二氧化錫、二氧化鈰、和二氧化鈦)作為光催化劑，來研究染料光分解反應。在實驗中我們藉著改變不同催化條件，例如: 不同光催化劑使用量、染料濃度、溶液酸鹼值和照射光波長，量測紫外可見光吸收光譜圖變化，來探討光催化機制與分解速率。我們發現光，催化劑的量與反應速率並非成線性關係。在鹼性環境中反應速率優於酸性環境中。染料起始濃度與催化劑必需要有一定的比例，才可達到最好的催化效率。另外，我們也將光催化劑作氫、氧電漿處理和高溫處理。而從實驗結果我們觀察出，高溫處理與氫、氧電漿處理，對於光催化劑的催化效果都有提升。最後我們使用田口式實驗計畫法找出在光催化反應中最佳反應條件，使得反應速率與催化效率達到最佳化。

關鍵字

光催化、染料溶液、電漿子材料

並列摘要

This study explored the photodegradation reaction of azo dyes using metal oxide (tin dioxide, cerium dioxide and titanium dioxide) as photocatalysts. In the experiment, we used different conditions such as the amount of photocatalysts, concentration of dye, solution pH values and different wavelengths to understand the catalytic mechanism and decomposition rate via UV/vis absorption spectroscopy. From these results, we found out that the relation between the amount of photocatalyst and the photocatalytic reaction rates are non-linear and the catalytic efficiencies in the alkaline solution are better than the acidic ones. To achieve a good catalytic efficiency, there is a range of ratio between the initial dye concentration and the amount of catalysts. Prior to the photocatalytic reaction, we used hydrogen and oxygen plasma treatment and calcination to the photocatalysts in order to improve the photocatalytic efficiency. Finally, Taguchi method was used to find the optimized condition for the photocatalytic reaction efficiency.

並列關鍵字

photocatalytic、dye solutions、plasmonic materials

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