高娟娟博士研究生与团队成员，刘茂祥，钱悦月等研究了一种基于耦合羧基多壁碳纳米管和环糊精边缘功能化石墨烯复合材料的快速灵敏的电化学传感器GN-CD-cMWCNT/GCE，并成功地用于4-氨基苯酚、4-氯苯酚和4-硝基苯酚三种典型酚类的痕量检测。电化学研究表明该传感器具有良好的电催化活性、灵敏度和稳定性。在最优条件下，得到了这三种酚的检测限分别为0.019、0.017和0.027 μmol/L（3倍信噪比）。

Title: Highly-sensitive electrocatalytic determination for toxic phenols based on coupled cMWCNT/cyclodextrin edge-functionalized graphene composite 

Authors: Juanjuan Gao ^a, Maoxiang Liu ^a, Haiou Song ^b,*, Shupeng Zhang ^a,b*, Yueyue Qian ^a_, Aimin Li ^b,*

ABSTRACT:  Highly-sensitive electrocatalytic determination of toxic phenol compounds is of significance in environmental monitoring due to their low degradation and high toxicity to the environment and humans. In this paper, a rapid and sensitive electrochemical sensor based on coupled carboxyl-multi-walled carbon nanotube (cMWCNT) and cyclodextrin (CD) edge-functionalized graphene composite was successfully employed towards trace detection of three typical phenols (4-aminophenol, 4-AP; 4-chlorophenol, 4-CP; 4-nitrophenol, 4-NP). The morphology studies from scanning electron microscope and transmission electron microscope analysis revealed that cMWCNTs as conductive bridges were successfully incorporated into CD edge-functionalized graphene layers. Further, The electrocatalytic detection performance of the 3D simultaneously reduced and self-assembled sensing architecture (GN-CD-cMWCNT) with trace amounts of CDs was evaluated. The electrochemical studies demonstrated that GN-CD-cMWCNT displays excellent electrocatalytic activity, high sensitivity and stability. Under optimal conditions, the current responses of 4-AP, 4-CP and 4-NP are linear to concentrations over two different ranges, with low detection limit of 0.019, 0.017 and 0.027 μM (S/N = 3), respectively. And, GN-CD-cMWCNT shows an excellent anti-interference ability against electroactive species and metal ions. In addition, validation of the applicability of the presented sensor was also performed for the determination of three phenols in tap water sample with satisfactory results. 

原文链接：http://www.sciencedirect.com/science/article/pii/S0304389416306069

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