離子液體結合石墨烯的複合材料於固相微萃取的研究

黃琨祐(Huang Kun-Yu)

指導教授 ： 魏國佐

國立中正大學/理學院/化學暨生物化學系/碩士(2013年)

摘要

本研究第一部份探討離子液體添加 reduced grapheme oxide (RGO)形成的複合材料作為固相微萃取纖維毛細管對萃取效率的影響，實驗上使用兩種可聚合離子液體單體，將此兩種離子液體溶於分散液中，加入適當的交聯試劑及 RGO，此為 ILs-RGO fiber之塗佈溶液，再將萃取纖維浸泡於塗佈溶液中，取出塗佈後的毛細管進行熱聚合，即完成 ILs-RGO fiber製備。
在最佳化的條件下以非極性的 BTEX和極性苯酚類的萃取來比較未添加與添加 RGO對萃取效能的影響。由於 RGO具有高表面積且提供 π-π作用力，可加強靜相與分析物的作用力，所以在離子液體中添加RGO對於BTEX及苯酚類的萃取率提升約7倍；而與添加多壁奈米碳管的萃取結果比較，添加RGO也比多璧奈米碳管有較佳的萃取率。
第二部份將離子液體塗佈於silica gel並且進行熱聚合，結果顯示塗佈了離子液體之silica gel對於陰離子與中性染料明顯提升約9倍，但對於β-blockers與PAHs萃取效率則無提升效果；而在離子液體中分別添加了奈米碳材塗佈於silica gel對於染料、β-blockers及PAHs也無顯著提升效果。

關鍵字

固相微萃取

並列摘要

In the first part, we investigated the effect of solid-phase microextraction fiber of ionic liquids ( ILs ) and reduced grapheme oxide ( RGO ) composite on the extraction of BTEX and chlorophenols. Two ILs monomers were used to form the fiber composite. The coating solution of ILs-RGO fiber was prepared by mixing RGO and ILs in dispersant. A fused-silica fiber was dipped into coating solution, and then removed from the coating solution for thermal polymerization to form the ILs-RGO fiber.
The extraction efficient of ILs-RGO fiber was compared with ILs fiber in the optimized extraction conditions. The extraction efficiencies of BTEX and chlorophenols with ILs-RGO fiber were enhanced about 7 times, as compared with those of ILs fiber. In addition, the ILs-RGO fiber also has better extraction efficiency than that of ILs-MWCNT fiber. This may be due to the ultrahigh specific surface area and π-π interaction of RGO.
In the second part, silica gel was coated with ionic liquid to form the SiO2-ILs sorbent. The extraction efficiencies of anionic and nonionic dyes were enhanced about 9 times. But poor extraction efficiencies for β-blockers and PAHs were obtained. We also investigated the effect of ILs and Nanocarbon materials composite on the extraction of dyes、β-blockers and PAHs. However we cannot got good extraction efficiencies on these solutes.

並列關鍵字

Solid phase micro-extraction

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