Fluorescence Quenching Detection of Clothianidin in Fruit and Vegetable Samples Using MAPbBr3 Perovskite Quantum Dots
文献类型： 外文期刊
作者： Liu, Li 1 ; Peng, Maomin 1 ; Xu, Ke 4 ; Xia, Hong 1 ; Peng, Xitian 1 ; Peng, Lijun 1 ; Zhou, Youxiang 1 ; Zhang, Jin Z. 3 ;
作者机构： 1.Hubei Acad Agr Sci, Res Inst Agr Qual Stand & Testing Technol, Wuhan 430064, Peoples R China
2.Hubei Key Lab Nutr Qual & Safety Agroprod, Wuhan 430064, Peoples R China
3.Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95064 USA
4.Chinese Acad Sci, Shenzhen Inst Adv Technol, Multiscale Crystal Mat Res Ctr, Shenzhen 518055, Peoples R China
关键词： perovskite; quantum dots; clothianidin; fluorescence detection; neonicotinoids
期刊名称：ACS APPLIED NANO MATERIALS （ 2022影响因子：5.9； 五年影响因子：5.9 ）
年卷期： 2024 年 7 卷 8 期
收录情况： SCI
摘要： Highly stable and photoluminescent methylammonium lead halide perovskite quantum dots (MAPbBr(3) PQDs) have been synthesized and applied for the fluorescence quenching detection of clothianidin in fruit and vegetable samples. Characterizations using different techniques, including photoluminescence (PL), X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and time-resolved PL (TRPL), show that static quenching is the dominant fluorescence quenching mechanism of MAPbBr(3) PQDs with clothianidin. Hydrogen bonds or van der Waals forces play major roles in the MAPbBr(3) PQDs-clothianidin interaction. Under optimized conditions, the relative PL intensity of MAPbBr(3) PQDs is linear to the concentration of clothianidin in the 0.0 and 20.0 mg/L range with a detection limit of 0.17 mu g/kg. Excellent recoveries of 79.5-115.4% were acquired for radish and banana samples with a relative standard deviation below 9.4%. These results indicate that PQDs can be used for qualitative and quantitative identification of clothianidin, providing an effective detection method for risk prevention and control of neonicotinoid pesticide residues in agricultural products.
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