The Cu-MOF-199/single-walled carbon nanotubes modified electrode for simultaneous determination of hydroquinone and catechol with extended linear ranges and lower detection limits |
| |
Authors: | Jian Zhou Xi Li Linlin Yang Songlin Yan Mengmeng Wang Dan Cheng Qi Chen Yulin Dong Peng Liu Weiquan Cai Chaocan Zhang |
| |
Affiliation: | 1. School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, PR China;2. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, PR China |
| |
Abstract: | A novel electrochemical sensor based on Cu-MOF-199 [Cu-MOF-199 = Cu3(BTC)2 (BTC = 1,3,5-benzenetricarboxylicacid)] and SWCNTs (single-walled carbon nanotubes) was fabricated for the simultaneous determination of hydroquinone (HQ) and catechol (CT). The modification procedure was carried out through casting SWCNTs on the bare glassy carbon electrode (GCE) and followed by the electrodeposition of Cu-MOF-199 on the SWCNTs modified electrode. Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) were performed to characterize the electrochemical performance and surface characteristics of the as-prepared sensor. The composite electrode exhibited an excellent electrocatalytic activity with increased electrochemical signals towards the oxidation of HQ and CT, owing to the synergistic effect of SWCNTs and Cu-MOF-199. Under the optimized condition, the linear response range were from 0.1 to 1453 μmol L−1 (RHQ = 0.9999) for HQ and 0.1–1150 μmol L−1 (RCT = 0.9990) for CT. The detection limits for HQ and CT were as low as 0.08 and 0.1 μmol L−1, respectively. Moreover, the modified electrode presented the good reproducibility and the excellent anti-interference performance. The analytical performance of the developed sensor for the simultaneous detection of HQ and CT had been evaluated in practical samples with satisfying results. |
| |
Keywords: | Cu-MOF-199 Single-walled carbon nanotubes Hydroquinone Catechol Simultaneous determination Electrocatalysis |
本文献已被 ScienceDirect 等数据库收录! |
|