Department of Chemistry, College of Sciences, Northeastern University, Shenyang, Liaoning 110819, China.
Department of Chemistry, College of Sciences, Northeastern University, Shenyang, Liaoning 110819, China; Foshan Graduate School of Innovation, Northeastern University, Foshan, Guangdong 528311, China.
Food Chem. 2025 Jan 15;463(Pt 3):141441. doi: 10.1016/j.foodchem.2024.141441. Epub 2024 Sep 25.
Exploring materials with the dual functionality of detecting and removing tetracycline (TC) residues is crucial because of the environmental and health risks posed by antibiotic overuse. This study introduces a dual-emissive luminescent probe, CDs@ZSM-5:Eu, created through a solvent-free method combined with subsequent Euion exchange. The nanocomposite's blue emission, originating from carbon dots (CDs), is quenched by TC via an internal filtering effect, while an antenna effect triggers a strong red fluorescence of a TC-Euchelate. The ratiometric fluorescence changes in CDs@ZSM-5:Eu endow a self-calibrated sensing mechanism for TC, offering a low detection limit of 5.04 nM and a broad detection range of 0.01-50 μM. Demonstrated in real milk samples, the probe exhibits high selectivity and accuracy in detecting TC. The nanocomposite also displayed an impressive TC removal capacity of 238.1 mg g in water, ascribing to the enrichment and electrostatic attraction effects of ZSM-5 toward TC molecules. This research offers a facile strategy for constructing multifunctional zeolite-based hybrids for simultaneous TC detection and removal from aqueous solutions.
探索同时具有检测和去除四环素 (TC) 残留功能的材料至关重要，因为抗生素的过度使用会带来环境和健康风险。本研究引入了一种通过无溶剂法结合随后的 Eu 离子交换制备的双发射荧光探针 CDs@ZSM-5:Eu。该纳米复合材料的蓝色发射源自碳点 (CDs)，通过内滤效应被 TC 猝灭，而天线效应则引发 TC-配合物的强红色荧光。CDs@ZSM-5:Eu 的比率荧光变化赋予了 TC 的自校准传感机制，检测 TC 的检测限低至 5.04 nM，检测范围宽至 0.01-50 μM。在实际牛奶样品中的测试表明，该探针在检测 TC 时具有高选择性和准确性。该纳米复合材料在水中对 TC 的去除能力也令人印象深刻，达到 238.1 mg g，这归因于 ZSM-5 对 TC 分子的富集和静电吸引作用。本研究为构建用于同时从水溶液中检测和去除 TC 的多功能沸石基杂化材料提供了一种简便的策略。
