黏粒修飾鍍銅網版印刷電極電化學特性之探討

近二十年來黏粒修飾電極不斷地被應用於重金屬、有機化合物及生化感測器上的使用，其在未來的研究上應有很大發展潛勢。以不同黏土礦物修飾在鍍銅網版印刷電極上進行電化學分析結果指出黏土礦物可促進銅的氧化還原電流量，此增大的部分與銅離子在黏土礦物表面吸附有關，三種黏土礦物中以多鐵蒙特石修飾的對銅的還原電流量增加最大。然而，有巴拉刈存在時，高嶺石能使鍍銅電極上之銅的氧化還原電流量增加最大，此與高嶺石邊緣的可變性電荷及巴拉刈的電子傳導有密切關係。黏粒修飾鍍銅電極對巴拉刈的偵測結果顯示三種黏土礦物仍以具有較高電荷密度及八面體層中鐵的電子傳導之多鐵蒙特石所測到的還原電流量最大，黏粒修飾鍍銅電極未來在生化物質的偵測上應具有研究發展的潛力。

關鍵字

黏土礦物；鍍銅網版印刷電極；巴拉刈

並列摘要

In the last twenty years, clay modified electrodes were continuously used to determine heavy metals organic compounds and to fabricate biosensors. We report here on the characterization of copper-plated screen-printed electrodes modified by different clay minerals for the same purpose. The results indicated that clay minerals could improve oxidative and reductive currents of copper through the adsorption of copper ion on the surface of clay minerals. Nontronite showed the largest improvement in reductive currents of copper among the three clay minerals studied. On the other hand, kaolinite showed the largest increase in reductive currents of copper in the presence of paraquat. This could possibly be related to the variable charge of kaolinite and electronic transferability of paraquat. Nontronite modified copper-plated electrodes possess the largest reductive currents of paraquat due to their larger charge density and electronic transferability of octahedral iron. Overall, based on this study, clay modified copper-plated electrodes show high potential in future research for determining biochemical compounds.

並列關鍵字

Clay minerals ； Copper-plated screen-printed electrode ； Paraquat

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黏粒修飾鍍銅網版印刷電極電化學特性之探討

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