Bridged β-cyclodextrin-functionalized MWCNT with higher supramolecular recognition capability: The simultaneous electrochemical determination of three phenols
Bridged β-cyclodextrin-functionalized MWCNT with higher supramolecular recognition capability: The simultaneous electrochemical determination of three phenols
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DOI：
10.1016/j.bios.2015.01.059
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发表时间：
2015-06-15
影响因子：
12.6
通讯作者：
Li, Can-Peng
中科院分区：
文献类型：
--
作者：
Yang, Long;Fan, Shuangmei;Li, Can-Peng
首次成功构建了一种基于二硫键桥联β-环糊精二聚体功能化多壁碳纳米管（DB beta-CD-MWCNT）纳米杂化物的快速、灵敏的电化学传感器。利用该传感器对自来水和废水中的3种酚类物质（4-氨基酚，4-AP; 4-氯酚，4-CP; 4-硝基酚，4-NP）进行了同时痕量分析。利用循环伏安法、微分脉冲伏安法和电化学阻抗谱对修饰电极进行了表征。所提出的DB beta-CD-MWCNT修饰电极显示出对4-AP、4-CP和4-NP的电化学信号上级优于beta-CD-MWCNT和MWCNT。在最佳条件下，微分脉冲伏安法用于同时定量4-AP，4-CP，和4-NP的浓度范围为0.01-20，0.1-200，和0.1-200 μ M，分别。DB β-CD-MWCNT纳米杂化电极对4-AP、4-CP和4-NP的检测限（S/N=3）分别为0.0042、0.028和0.048 μ M。结果表明，该电化学传感器可用于水和废水样品中4-AP、4-CP和4-NP的同时痕量分析。本工作为桥连环糊精在电化学传感或生物传感中的应用开辟了新的途径。(C)2015 Elsevier B. V.版权所有。
A rapid and sensitive electrochemical sensor based on disulfides bridged beta-cyclodextrin dimer-functionalized multi-walled carbon nanotube (DB beta-CD-MWCNT) nanohybrids with higher supramolecular recognition capability was successfully constructed for the first time. Simultaneous trace analysis of three phenols (4-aminophenol, 4-AP; 4-chlorophenol, 4-CP; 4-nitrophenol, 4-NP) in tap-water and wastewater samples was performed based on the constructed sensor. Cyclic voltammetry, differential pulse voltammetry, and electrochemical impedance spectroscopy were utilized to characterize the properties of the modified electrode. The proposed DB beta-CD-MWCNT-modified electrode displayed electrochemical signal superior to those of beta-CD-MWCNT and MWCNT towards 4-AP, 4-CP, and 4-NP. Under optimal conditions, differential pulse voltammetry was used to simultaneously quantify 4-AP, 4-CP, and 4-NP within the concentration range of 0.01-20, 0.1-200, and 0.1-200 mu M, respectively. The detection limits (S/N=3) of the DB beta-CD-MWCNT nanohybrid electrode for 4-AP, 4-CP, and 4-NP were 0.0042, 0.028, and 0.048 mu M, respectively. Satisfactory results revealed that this proposed electrochemical sensor can provide a promising candidate for the simultaneous trace analysis of 4-AP, 4-CP, and 4-NP in environmental monitoring of water and wastewater samples. The present work might broaden the channel toward the application of bridged CD in the electrochemical sensing or biosensing. (C) 2015 Elsevier B.V. All rights reserved.