Journal
TALANTA
Volume 222, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2020.121703
Keywords
Parathion-methyl; Quantum dots; Cyclodextrin; Fluorescent sensing; Organophosphorus pesticides; Probe
Categories
Funding
- National Natural Science Foundation of China [21607061]
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, YICCAS [2020KFJJ16]
- Opening Project of State Key Laboratory of Chemo/Biosensing and Chemometrics of Hunan University [2018019]
- Open Project Program of Key Laboratory for Analytical Science of Food Safety and Biology, Ministry of Education [FS2008]
- Priority Academic Program Development of Jiangsu Higher Education Institutions, Collaborative Innovation Center of Technology and Material of Water Treatment
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A novel nanoprobe based on molybdenum disulfide quantum dots (MoS2 QDs) and cyclodextrin was developed for the fluorescent detection of parathion-methyl, with wide detection scope and excellent selectivity.
Through modifying molybdenum disulfide quantum dots (MoS2 QDs) with 3-aminophenyl boronic acid and functionalizing further with hydropropyl-beta-cyclodextrin (beta-CD), a novel nanoprobe based on beta-CD functionalized MoS2 QDs (beta-CD-MoS2 QDs) was developed for the fluorescent detection of parathion-methyl (MP). beta-CD-MoS2 QDs was characterized with various technologies including transmission electron microscopy, X-ray photoelec-tron spectroscopy, fluorescence and UV-Vis absorption spectra. As for MP detection, MP was hydrolyzed to pnitrophenol (p-NP) under the alkaline conditions, and p-NP can enter into the beta-CD cavity due to the host-guest recognition capability of beta-CD, which then results the fluorescence quenching of nanoprobe. Based on this principle, an enzyme-free fluorescence sensing platform were constructed for MP. Under the optimal conditions, beta-CD-MoS2 QDs nanoprobe exhibits wide detection scope (0.01-18.0 ppm) and low detection limits (3.3 ppb) for MP detection. In addition, the nanoprobe has excellent selectivity for MP, and it can be applied to detect MP in real samples.
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