聚合型離子液體修飾奈米碳材及金屬材料電極於電分析上的開發及應用

The development and application of polymerized ionic liquid modified electrode by carbon nanomaterial and metal material for electrochemical analysis

洪培凱(PEI-KAI Hung)

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(2016年)

摘要

離子液體具有導電性，良好的熱穩定性以及化學穩定性，在化學修飾電極上可當作修飾材料的固定劑，研究第一部分為加入石墨烯(Reduced Graphene Oxide, RGO)和離子液體所形成的RGO-PIL-SPCE複合材料電極，實驗上探討其在乙醯胺酚藥物的偵測。和未經修飾的SPCE比較，RGO-PIL-SPCE能提供較大的表面積及導電度，此外其表面結構也會和分析物之間產生π-π interaction，這些特性提高分析物的氧化電流值並降低過電壓，加上聚合型離子液體具有的良好機械強度，此電極可以流動注射分析法（Flow injection analysis, FIA）進行定量分析，此方法的最低偵測極限及線性範圍分別為 5.20 μM及 25-10000 μM。
　　研究第二部分為加入兩種不同的金屬材料修飾物，分別是銀奈米粒子及鈷類普魯士藍而製成的PIL-AgNPs-SPCE及CoPB-PIL-SPCE複合材料修飾電極並將這類電極運用在過氧化氫（Hydrogen peroxide）及巰基乙酸（Thioglycolic acid）分析探討，以 FIA 的分析模式定量 H2O2 的最低偵測極限及線性範圍分別為 25.20 μM 及 50-40000 μM ; 巰基乙酸定量分析的最低偵測極限及線性範圍分別為 9.058 μM 及 25-2000 μM。此結果顯示出以離子液體為平台所形成的複合材料修飾電極具有良好的機械強度及穩定性，使網版碳印刷電極的應用更加廣泛。

關鍵字

離子液體 ； 離子液體修飾電極 ； 電化學分析 ； 流動注射分析法

並列摘要

Ionic liquid has the properties of high conductivity, good thermal and chemical stability. It can be used to immobilize the electroactive materials onto the electrode surface to form a modified electrode.
In the first part of the research, we combined ionic liquids with reduced graphene oxide (RGO) to prepare the RGO-PIL-SPCE composite electrode. The RGO-PIL-SPCE was empoyed to detect acetaminophen. In comparision with the unmodified electrode, the RGO-PIL-SPCE has the characteristic of high conductivity, high surface, and π-π interaction between analyte and RGO that can enhance the currents and decrease the overpotential of electrochemical reaction. In addition the RGO-PIL-SPCE has high mechanical strength that enable the use of flow injection analysis (FIA). The limit of detection (LOD) and linear range from FIA were 5.20 μM and 25-10000 μM, respectively.
In the second part of the research, we combined the ionic liquids with two metal materials, silver nanoparticles and cobalt prussian blue analogue, to prepare the PIL-AgNPs-SPCE and CoPB-PIL-SPCE composite electrode.The electrodes were employed in the detection of H2O2 and thiols. The LOD and linear range for H2O2 were 25.20 μM and 50-40000 μM, for thiol were 9.058 μM and 25-2000μM, respectively.
The result showed that the ionic liquid can be employed as the plateform to prepare the chemical modified electrodes of SPCE with high mechanical strength and chemical stability. These types of modified electrodes should expand the application of SPCE.

並列關鍵字

ionic liquid ； ionic liquid modified electrode ； electrochemical analysis ； Flow injection analysis

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