Integration of Metal-Organic Frameworks with Bi-Nanoprobes as Dual-Emissive Ratiometric Sensors for Fast and Highly Sensitive Determination of Food Hazards |
| |
| Authors: | Chi-Xuan Yao Lu Dong Lu Yang Jin Wang Shi-Jie Li Huan Lv Xue-Meng Ji Jing-Min Liu Shuo Wang |
| |
| Affiliation: | Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China; (C.-X.Y.); (L.D.); (L.Y.); (J.W.); (S.-J.L.); (H.L.); (X.-M.J.) |
| |
| Abstract: | 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. |
| |
| Keywords: | ZIF-67 heavy metal ions food-safety ratiometric fluorescence |
|
