期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 861, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2020.113954
关键词
Electrochemical determination; p-Chloronitrobenzene; Sensing platform; Ni-MOF; Graphene oxide
资金
- Longshan Academic Talent Research Supporting Program of Southwest University of Science and Technology [18LZX322]
- International Science and Technology Cooperation Laboratory of Micro-nanoparticle Application Research of Southwest University of Science and Technology [19MNA001]
- National Natural Science Foundation of China [41572025]
Constructing a sensitive voltammetric platform to analyze highly toxic organic pollutant p-chloronitrobenzene (pCNB) is highly desirable in environmental monitoring. Herein, a composite consisting of nickel-based metal-organic framework (Ni-MOF) and graphene oxide (GO) was successfully prepared by facile and cost-efficient chemical precipitation, and itwas further used as a modified material to develop an electrochemical sensor for p-CNB. Electrochemical properties of as-prepared sensor were investigated by electrochemical impedance spectroscopy, cyclic voltammetry and differential pulse voltammetry. As a result, the composite sensor showed superior electrocatalytic performance towards the oxidation of p-CNB in a concentration range of 0.10-300.0 mu M, and the detection limit was 8.0 nM (S/N= 3). Furthermore, as-prepared Ni-MOF/GO composite based sensor exhibited favorable reproducibility, durable stability and prominent selectivity. The practicability of the sensor was evaluated by detecting p-CNB in real tap water samples and satisfactory recovery rates were obtained, revealing its potential application for detection of p-CNB in water environment. (C) 2020 Elsevier B.V. All rights reserved.
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