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題名 | 以黏粒修飾電極法探討對硝基苯酚的電化學反應=Electrochemical Behavior of p-Nitrophenol at Clay-modified Electrodes |
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作者 | 朱家瑩; 陳鴻基; 曾志明; Chu, Chia-ying; Chen, Horng-ji; Zen, Jyh-myng; |
期刊 | 台灣農學會報 |
出版日期 | 20131200 |
卷期 | 14:6 2013.12[民102.12] |
頁次 | 頁607-630 |
分類號 | 434.223 |
語文 | chi |
關鍵詞 | 黏土礦物; 層面電荷; 電化學分析; Clay minerals; Layer charge; Electroanalysis; |
中文摘要 | 硝基苯酚常被使用於製藥、染料與塑化劑等的生產,對人體與生物體具有較大的毒害,會造成蛋白質分解、中樞神經系統麻痺、肝臟、腎臟及胰臟等的傷害。本研究之目的在以不同黏土礦物修飾網版印刷碳電極(SPCE)配合電化學分析法探討對硝基苯酚的電化學行為。試驗結果指出六種黏粒修飾SPCE對對硝基苯酚由HOC6H4NO2還原到HOC6H4NHOH所測到的R1波峰電流量以SWy-1最大(204μA),而以KGa-1最小(146μA);六種黏粒修飾預氧化網版印刷碳電極(SPCE*)可測到更大的R1還原波峰及氧化波峰電流量。由於SPCE*表面氧化層膜的羰基和羥基會與黏土礦物四面體層及八面體層表面產生氫鍵,其影響黏土礦物的電場效應與對硝基苯酚的極化,導致所測得之R1波峰形狀較為尖銳且波峰電流量較大,其中以SHCa-1最大(329μA),其次是SWy-1(317μA)。有巴拉刈存在時,六種黏粒修飾SPCE可測得R1還原波峰,但無法偵測到氧化波峰電流量,顯示巴拉刈的氧化力在對硝基苯酚氧化還原反應上的影響明顯與SPCE*表面氧化層膜對對硝基苯酚之作用機制不同。 |
英文摘要 | Nitrophenols commonly used in the production of pharmaceuticals, dyes, and plasticizers can cause protein degeneration and paralysis of the central nervous system and can also damage the liver, kidney, and pancreas. This study investigates the electrochemical behavior of p-nitrophenol at different clay-modified screen-printed carbon electrodes. The results indicate the reductive peak current of p-nitrophenol from HOC6H4NO2 to HOC6H4NHOH (R1) is 204.2μA for SWy-1 (the highest) and 145.7μA for KGa-1 (smallest) among the six clay-modified electrodes studied. Even larger reductive and oxidative peak currents can be detected at the clays modified on ”preanodized” screen-printed carbon electrodes (SPCE*) due to the hydrogen bonding between oxide film and the basal surfaces of the tetrahedral sheet and octahedral sheet. The highest reductive peak current (328.9μA) is detected at the SHCa-1 SPCE* and the next highest is 316.8μA at the SWy-1 SPCE*. Paraquat might affect the redox behavior of p-nitrophenol, causing a change in the peak shape and current for reductive peak current without oxidative peak currents. The effect of SPCE* is apparently different from that of paraquat since the oxidative power of paraquat on the redox of p-nitrophenol is different from that of oxide film at SPCE*. |
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