銀奈米粒子催化剛果紅降解之表面增強拉曼散射及紫外線可見光光譜研究

Surface-enhanced Raman Scattering and UV/Vis Spectroscopic Studies of the Degradation of Congo Red Catalyzed by Silver Colloidal Nanoparticles

劉康辰(Kang-Chen Liu)

指導教授 ： 黃俊嬴

高雄醫學大學/生命科學院/醫藥暨應用化學系碩士班/碩士(2020年)

摘要

表面增強拉曼光譜(SERS)是一項發展完善、擁有高敏感度的分析技術，並且因為其具有高靈敏度以及有豐富分子化學資訊，在近幾年受到高度的關注。
在本篇研究中，以銀奈米粒子作為金屬催化劑，用來催化以NaBH4對有機染料剛果紅的降解反應，並以紫外光-可見光光譜隨時監控樣品隨時間變化下溶液的光譜變化結果，同時利用SERS檢測銀奈米子對溶液訊號的表面增強拉曼效果，因為銀奈米粒子本身有很好的催化活性之外也具有高表面電漿共振效應，可同時作為表面增強拉曼散射檢測使用。我們期望在還原過程中，可以藉由觀察拉曼光譜並同時檢測UV-vis光譜來得知溶液裡的反應物與產物隨時間下改變的行為，並能利用拉曼光譜之特點找出反應在進行時之中間物，從而對各催化反應進行時所發生的真正反應機構能有更深入的了解，最終可以在SERS之輔助下更正確的預測催化反應之反應機構。從結果發現，樣品溶液的紫外光-可見光吸收值隨著時間逐漸下降，另外從SERS光譜也可以發現訊號隨著時間不斷的改變，藉由觀察紫外光-可見光以及SERS光譜可進一步了解銀奈米粒子的特性。

關鍵字

表面增強拉曼散射

並列摘要

Surface-enhanced Raman spectroscopy (SERS) is a well-established and high sensitive analytical technique, and because of its high sensitivity and rich molecular chemistry information, it has received high attention in recent years.
In this study, silver nanoparticles were used as metal catalysts to catalyze the degradation reaction of the organic dye Congo Red with NaBH4, and UV-Vis spectroscopy was used to monitor the changes in the sample's spectral changes over time at any time. Using SERS to detect the surface-enhanced Raman effect of silver nanoparticles on the solution signal. Because of the silver nanoparticles have good catalytic activity and high surface Plasmon Resonance effect, they can also be used as surface-enhanced Raman scattering detection.
We can know how the reactants and products in the solution changeRover time by observing the Raman spectrum and simultaneously detecting the UV-vis spectrum during the reduction process. And can use the characteristics of Raman spectroscopy to find the intermediate in the ongoing reaction. In order to have a deeper understanding of the real reaction mechanism that occurs when each catalytic reaction proceeds.
Finally, with the assistance of SERS, the reaction mechanism of the catalytic reaction can be predicted more accurately. In addition, the SERS spectrum can also be found to change the signal over time. By observing the UV-Vis and SERS spectrum, we can further understand the silver nanometer Particle characteristics.

並列關鍵字

SERS

參考文獻

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