β-Cyclodextrin functionalized molybdenum disulfide quantum dots as nanoprobe for sensitive fluorescent detection of parathion-methyl

TALANTA

卷:222

Article

Yi, Yinhui^1,2,4  Zeng, Wei¹  Zhu, Gangbing^1,3 

[1] Jiangsu Univ, Sch Environm & Safety Engn, Zhenjiang 212013, Jiangsu, Peoples R China

[2] Hunan Univ, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Peoples R China

[3] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai, Peoples R China

[4] Minist Educ, Key Lab Analyt Sci Food Safety & Biol, Fuzhou, Peoples R China

关键词: Parathion-methyl;    Quantum dots;    Cyclodextrin;    Fluorescent sensing;    Organophosphorus pesticides;    Probe;   

DOI  :  10.1016/j.talanta.2020.121703

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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