期刊
MOLECULES
卷 27, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/molecules27072356
关键词
ZIF-67; heavy metal ions; food-safety; ratiometric fluorescence
资金
- National Natural Science Foundation of China [32102068]
In this study, a dual-emission metal-organic framework-based ratiometric fluorescence probe was developed for rapid and simple detection of Cu2+ and Pb2+. The novel CQDs/QDs@ZIF-67 composite exhibited significantly aligned ratiometric fluorescence signal with the concentration of metal ions, achieving an extremely low detection limit. It showed potential for rapid and cost-effective detection of these two metal ions.
Functional nanoprobes which detect specific food hazards quickly and simply are still in high demand in the field of food-safety inspection research. In the present work, a dual-emission metal-organic framework-based ratiometric fluorescence probe was integrated to detect Cu2+ and Pb2+ with rapidness and ease. Specifically, quantum dots (QDs) and carbon quantum dots (CQDs) were successfully embedded into zeolitic imidazolate framework-67 (ZIF-67) to function as a novel ratiometric fluorescent sensing composite. The ratiometric fluorescence signal of CQDs/QDs@ZIF-67 was significantly aligned with the concentration of metal ions to give an extremely low detection limit of 0.3324 nM. The highly sensitive and selective CQDs/QDs@ZIF-67 composite showed potential for the rapid and cost-effective detection of two metal ions.
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