期刊
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
卷 14, 期 10, 页码 9785-9795出版社
ESG
DOI: 10.20964/2019.10.28
关键词
beta-CD/MWCNTs/CP composite electrode; Synergetic effect; Electrochemical sensor; Methyl parathion
资金
- National Key R&D Program of China [2017YFD0301104]
- High-level Talents Startup Project of Henan Institute of Science and Technology [103010615001]
- Henan Postdoctoral Fund Project [159831]
Based on the beta-cyclodextrin/multi-walled carbon nanotubes/carbon paper (beta-CD/MWCNTs/CP) composite, a simple, low-cost and efficient electrochemical sensor is first designed in the work for the rapid and sensitive detection of methyl parathion (MP). The characteristic peaks of beta-CD and MWCNTs are simultaneously observed in the XRD and FTIR results, and these two materials disperse homogeneously on the surface of CP electrode. The results of electrochemical measurements suggest that the obtained beta-CD/MWCNTs/CP composite electrode exhibits remarkable synergetic effect, significantly enhancing the efficiency and sensitivity of electrochemical sensor for the selective adsorption property of beta-CD, high electrical conductivity and large surface area of MWCNTs, as well as easy operation of CP electrode. Under the optimal conditions, the beta-CD/MWCNTs/CP-based electrochemical sensor exhibits excellent MP determination performance with a low detection limit of 2.4 ng mL(-1)(S/N=3) and a wide linear concentration range from 0.01 to 13 mu g mL(-1). Given that the CP is not expensive and the construction of CP-based electrochemical sensor can avoid several complex working procedures, this work has a great significance on promoting the more practical electrochemical sensor for the rapid and sensitive detection of MP.
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