期刊
MICROCHEMICAL JOURNAL
卷 179, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.microc.2022.107465
关键词
Anionic pillar[6]arene; Electrochemically reduced graphene oxide; Supramolecular recognition; Electrochemical sensing; Clothianidin
资金
- Program for Innovative Research Team (in Science and Technology) in University of Henan Province [20IRTSTHN008]
- Scientific and Technological Project of Henan Province [202102210050, 212102310258]
- Doctoral Fund of Henan University of Engineering [Dkj2018007]
This study presents a promising electrochemical sensing platform for rapid and sensitive analysis of clothianidin (CLO) by constructing an electrochemically reduced graphene oxide-anionic pillar[6]arene (ErGO-AP6) composite film on the surface of a glassy carbon electrode. The ErGO-AP6 composite film exhibits higher supramolecular recognition capability between AP6 and CLO compared to beta-cyclodextrin (beta-CD), resulting in outstanding sensitivity and selectivity towards CLO.
On the surface of glassy carbon electrode, electrochemically reduced graphene oxide-anionic pillar[6]arene (ErGO-AP6) composite film is directly constructed using a potentiostatic method. This composite film is used as an electrochemical sensing platform for detecting clothianidin (CLO). Studies on the interaction mechanism reveal a higher supramolecular recognition capability between AP6 and CLO, compared to that between beta-cyclodextrin (beta-CD) and CLO. Owing to the synergistic effect of ErGO and AP6, the ErGO-AP6 composite film shows an outstanding sensitivity and excellent selectivity towards CLO, superior to that of ErGO-beta-CD film. The linear range from 1.0 x 10- 7 to 5.0 x 10(-5) mol L-1 and detection limit of 4.0 x 10(-8) mol L-1 for CLO are achieved. In addition, the presented method is used for fruit and water samples in a recovery test, showing recovery rates between 90.0% and 99.4%. This study provides a promising electrochemical sensing platform for rapid and sensitive analysis of CLO.
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