本文選題：ZnCrFeO_ + 多壁碳納米管�。� 參考：《催化學(xué)報(bào)》2016年03期

【摘要】：采用一種簡(jiǎn)單靈敏的方法開(kāi)發(fā)了在多壁碳納米管修飾的ZnCrFeO_4糊電極(MWCNTs/ZnCrFeO_4/CPE)表面測(cè)定芐丙酮香豆素的新型傳感器.運(yùn)用循環(huán)伏安法、差示脈沖伏安法、計(jì)時(shí)電流法和電化學(xué)阻抗譜考察了該化學(xué)修飾電極上芐丙酮香豆素的電化學(xué)性能.結(jié)果表明,MWCNTs/ZnCrFeO_4/CPE電極對(duì)芐丙酮香豆素氧化表現(xiàn)出較高的電催化活性,在pH=4時(shí),產(chǎn)生峰值氧化電流約0.97 vs Ag/AgCl參比電極.當(dāng)芐丙酮香豆素濃度在0.02 920.0μmol/L范圍內(nèi),該峰電流與其呈線(xiàn)性關(guān)系,檢測(cè)極限(3σ)為0.003μmol/L.另外,運(yùn)用差示脈沖伏安法測(cè)定了MWCNTs/ZnCrFeO_4/CPE電極上芐丙酮香豆素的催化反應(yīng)速率常數(shù)和擴(kuò)散系數(shù).
[Abstract]:A new sensor for the determination of coumarin in benzyl acetone on the surface of multiwalled carbon nanotube modified ZnCrFeO_4 paste electrode (MWCNTs / ZnCrFeO / 4 / CPE) was developed by a simple and sensitive method. The electrochemical properties of coumarin on the chemically modified electrode were investigated by cyclic voltammetry, differential pulse voltammetry, chronoamperometry and electrochemical impedance spectroscopy. The results show that the MWCNTs / ZnCrFeO4 / CPE electrode exhibits high electrocatalytic activity for the oxidation of benzyl acetone coumarin. At pH = 4, the peak oxidation current is about 0.97 vs Ag/AgCl reference electrode. When the concentration of coumarin in benzyl acetone is in the range of 920.0 渭 mol/L, the peak current is linear with the detection limit of 0.003 渭 mol / L. In addition, the catalytic reaction rate constant and diffusion coefficient of coumarin benzyl acetone on MWCNTs/ZnCrFeO_4/CPE electrode were determined by differential pulse voltammetry.
【作者單位】： 帕亞莫·努爾大學(xué)化學(xué)系;
【分類(lèi)號(hào)】：TQ460.72;O657.1
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本文編號(hào)：1824544