中孔洞材料SBA-15及其官能基化衍生材料對溶液中污染物之吸附應用; Adsorption of the Toxic Compounds into the Mesoporous Silica Nanoparticles

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题名:	中孔洞材料SBA-15及其官能基化衍生材料對溶液中污染物之吸附應用;Adsorption of the Toxic Compounds into the Mesoporous Silica Nanoparticles
作者:	包雅玲;Ya-Ling Bau
贡献者:	化學研究所
关键词:	中孔洞材料;巴拉刈;三氯沙;mesoporous;SBA-15;paraquat;triclosan
日期:	2011-08-24
上传时间:	2012-01-05 14:29:27 (UTC+8)
摘要:	由於中孔洞材料具有極大的比表面積及高選擇性的吸附，發展至今應用已經非常廣泛，在很多科學領域的範疇有其不可抹滅的地位，在不同的科學領域都有大量的相關研究，諸如反應的催化、藥物的運輸及物質的吸附。　　本篇論文主要為將中孔洞材料SBA-15及其官能基化衍生物作為吸附材料，先對數種不同的持久性有機汙染物進行篩選，初步結果中發現SBA-15及具有羧酸官能基之CES系列材料對巴拉刈有不錯的吸附效果，對三氯沙雖然有效果但並不顯著。　　根據初步的結果此論文先針對巴拉刈及其類似結構物以不同吸附條件 (不同中孔洞材料重量、不同吸附時間、不同溫度) 進行實驗，並探討各個變因對吸附的影響，以找出最佳吸附的條件；另一個部分則是使用以氨基苯基丙酸修飾過後之SBA-15及CES10% （Phe系列中孔洞材料）進行三氯沙的吸附實驗，並比較修飾前後之吸附結果。根據實驗的結果發現羧酸官能基修飾之中孔洞材料可以吸附巴拉刈及其類似結構物，其吸附現象符合Langmuir方程式之計算，推測其物理吸附。針對三氯沙的吸附，其吸附效果為: Phe系列 > CES 系列，推測其原因可能是因為Phe-CES 10%修飾上之苯環與三氯沙上的苯環具有pi-pi作用力，故吸附效果提高約百分之十，而Phe-SBA-15修飾後所形成的環狀結構，使孔洞內部極性下降，吸附能力也提高的百分之二十。比較市售的碳素中孔洞材料與本篇所使用之SBA-15中孔洞矽奈米粒子的吸附能力，SBA-15對於巴拉刈及其類似結構物與三氯沙的吸附效果較碳素中孔洞材料吸附效果多了百分之三十到五十。 Because of owing high surface area with ability of selectivity adsorption and low toxicity, mesoporous silica nanoparticles (MSNs) family was wildly used in the field of toxic molecules adsorption research and development of drug delivery system. In industrial aspect, MSNs have played an important role in some applications, such as chemical catalysis, drug synthesis and, atmospheric science. Herein, our study - is about using the MSNs SBA-15 and its functionalized derivative compounds as materials for adsorbing contaminants in water, for example: paraquat, paraquat analogues, triclosan and etc. 　　In order to investigate the capability of adsorption for mesoporous materials, various materials adsorption conditions were prepared in this study. We changed the interaction time period, adjusted different temperature, and tested different dose of MSNs for finding saturated amount in solution. Interestingly, paraquat and paraquat analogues can be adsorbed by CES series MSNs, and this adsorption obeying Langmuir equation is a kind of physusorption. Meanwhile both CES and Phe series MSNs are also able to adsorb environment hormone, -triclosan. Amazingly, our result has showed the adsorption capacity of Phe-CES 10% for Triclosan is approximately 10% better than CES 10%. This consequence may be due to having good pi-pi interactions between benzene group on functionalized mesoporous with triclosan. Also, the adsorption capacity of Phe-SBA-15 for Triclosan is approximately 20% better than SBA-15. The decreased polar character of the functionalized mesoporous may be addressed for this result. In addition, our study also compared with the commercially available material carbon mesoporous, the adsorption capacity of SBA-15 for paraquat, paraquat analogues and Triclosan is approximately 30~50% much better than carbon mesoporous.
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