A simple strategy to fabricate high sensitive 2,4-dichlorophenol electrochemical sensor based on metal organic framework Cu3(BTC)2

• Published in: Sensors and actuators. B, Chemical Chemical, 2016-01, Vol.222, p.972-979
• Main Authors: Dong, Sheying, Suo, Gaochao, Li, Nan, Chen, Zhen, Peng, Lei, Fu, Yile, Yang, Qin, Huang, Tinglin
• Format: Article
• Language: English
• Subjects: 2,4-Dichlorophenol; Carbon; Cu3(BTC)2 MOF material; Determination; Diffraction; Electrochemical sensor; Electrodes; Metal-organic frameworks; Reservoirs; Sensing devices; Sensors; Specific surface; Voltammetry
• ISSN: 0925-4005; 1873-3077
• DOI: 10.1016/j.snb.2015.09.035

A highly sensitive and simply electrochemical sensor for the determination of 2,4-dichlorophenol (2,4-DCP) based on metal–organic frameworks (MOFs) 1,3,5-benzenetricarboxylic acid copper [Cu3(BTC)2] modified carbon paste electrode has been developed. The composition and morphology of Cu3(BTC)2 were characterized by Fourier transform infrared spectrometry, X-ray diffraction, scanning electron microscopy and N2 adsorption–desorption isotherm. Meanwhile, the electrochemical performances were investigated by cyclic voltammetry and differential pulse voltammetry. Under the optimized conditions, the proposed sensor not only exhibited high selectivity toward 2,4-DCP in comparison with those in references, but also showed a wide linear range over 2,4-DCP concentration from 0.04 to 1.0μM with a low detection limit of 9nM, which attributed to the advantages of Cu3(BTC)2 such as large specific surface area, high adsorption capacity and good electron transfer efficiency. Furthermore, the sensor was successfully applied for the determination of 2,4-DCP in reservoir raw water samples with satisfactory results. With those remarkable performances, MOFs may provide a platform in the area of sensors, which could extend the scope of MOFs constructing electrochemical sensing devices and hold a great promise for routine sensing applications.