Molecules | |
Integration of Metal-Organic Frameworks with Bi-Nanoprobes as Dual-Emissive Ratiometric Sensors for Fast and Highly Sensitive Determination of Food Hazards | |
Xue-Meng Ji1  Shi-Jie Li1  Jin Wang1  Jing-Min Liu1  Lu Yang1  Shuo Wang1  Chi-Xuan Yao1  Lu Dong1  Huan Lv1  | |
[1] Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China; | |
关键词: ZIF-67; heavy metal ions; food-safety; ratiometric fluorescence; | |
DOI : 10.3390/molecules27072356 | |
来源: DOAJ |
【 摘 要 】
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.
【 授权许可】
Unknown