- 學位論文
奈米碳材複合薄膜修飾電極應用於電化學感測器之研究
Electrochemical Studies of Carbon Based Nanocomposite Materials Modified Electrodes for Electroanalytical Applications
摘要
碳材像是多層奈米碳管及石墨烯在電化學感測器或生物感測器中是一個很好的感測材料，它有良好的機械、電化學及熱力學性質，尺寸與材料的特性使得它在感測器中有許多優勢。然而，電化學感測器需要改善靈敏度、選擇性，以滿足未來各種領域的需求。因此，本研究包含了各種複合材料像是化學還原石墨烯氧化物 (CRGO) 、官能基化多層奈米碳管 (f-MWCNTs、AFCNT) 的電化學製備，以及應用於實驗室樣品與真實樣品的測試。使用上述的奈米碳材料於電極表面能夠有效的增加氧化還原反應、表面覆蓋率與電子轉移速率。另外，我們也加入各種金屬材料像是鈀 (Pd)、二氧化鋯 (ZrO2) 以及鎳赤血鹽 (NiHCF) 奈米粒子。成功製備出的碳材複合薄膜修飾電極對於許多重要的物質有良好的電化學活性，CRGO/Pd用於同時偵測多巴胺與雙氯芬酸；ZrO2/f-MWCNTs用於偵測4-硝基苯酚；NiHCF-AFCNT用於偵測S2O82-、單寧酸。
並列摘要
Carbon materials such as multiwalled carbon nanotubes and graphene shows promising sensing materials in electrochemical sensors and biosensors, which have the characteristics of low weight of extraordinary mechanical, electrical, thermal and multifunctional properties. The size scale, aspect ratio and properties of these materials provide advantages in various aspects of sensor functionalities. However, electrochemical sensor platforms will require significant improvements in sensitivity, specificity and parallelism to meet the future needs in variety of fields. In order to meet these above said requirements, electrodes made of various composite materials containing chemically reduced graphene oxide (CRGO), functionalized multiwalled carbon nanotubes (f-MWCNTs) and amine group functionalized carbon nano tubes (AFCNT) have been successfully studied and studied for real time sensor applications. The studies show that the above used carbon materials enhanced the redox reactions, deposition rate, surface coverage concentration, and electron transfer rate of materials during the composite film formation on the electrode surface. Materials used in these studies for various composite preparations are palladium nanoparticles (Pd), zirconium oxide nanoparticles (ZrO2) and nickel hexacyanoferrate (NiHCF). These successfully prepared carbon materials containing composite film modified electrodes have been explored further for the electro analytical determination of biochemical and chemical compounds such as CRGO/Pd for dopamine and diclofenac, ZrO2/f-MWCNTs for p-nitrophenol, NiHCF-AFCNT for S2O82- and tannic acid. Studies on interferences of few chemical and biochemical compounds present in these mixtures have also been successfully explored.