1. Water-soluble, SDS-functionalized CdSe/CdS/ZnS quantum dots for uranium detection in aqueous environments.
- Author
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Yang, Shiyu, Li, Wen, Li, Zhenwei, Zeng, Xiankan, Wang, Qungui, Yan, Cheng, Pan, Lunyao, Chen, Yongjian, Mu, Maolin, Li, Chenglong, and Yang, Weiqing
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QUANTUM dots , *SODIUM dodecyl sulfate , *FLUORESCENCE quenching , *URANIUM , *LIGANDS (Chemistry) , *FLUORESCENT probes - Abstract
Water-soluble fluorescent probes for conveniently and rapidly monitoring the hazardous uranyl ions (UO 2 2+) in nuclear wastewater are crucial for public nuclear security. Herein, we demonstrated a water-soluble CdSe/CdS/ZnS QDs probe by substituting hydrophilic dodecyl sodium sulfate (SDS) ligands for the original hydrophobic oleic acid ligands toward the rapid and accurate detection of trace UO 2 2+ in aqueous environments. From this simple ligand exchange mothed, the as-prepared QDs probe exhibited a narrow full width at half maximum (FWHM) of 53 nm with an emission peak at 666 nm. Benefiting from dynamic and static fluorescence quenching interaction, this probe represented a high sensitivity (a detect limit of 15.4 nM), a high selectivity with comparison of presettable eight metal ions), a high environmental stability (a recovery rate of 81–94 %) and a rapid inspection ability (on the order of a few minutes). Therefore, this work provided a new approach for the determination of UO 2 2+ in aqueous environments and then for the assurance of public nuclear security. [Display omitted] [ABSTRACT FROM AUTHOR]
- Published
- 2024
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