State Key Laboratory of Pollution Control and Resource Reuse, International Joint Research Center for Sustainable Urban Water System, College of Environmental Science & Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, PR China.
State Key Laboratory of Pollution Control and Resource Reuse, International Joint Research Center for Sustainable Urban Water System, College of Environmental Science & Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, PR China.
Water Res. 2019 Oct 15;163:114883. doi: 10.1016/j.watres.2019.114883. Epub 2019 Jul 17.
Phosphate, due to its somatotrophic effect on organisms, can cause severe eutrophication with excessive content in water. Conventional methods for phosphate detection, which are based on complicated instruments, are time-consuming. Here we report a luminescent lanthanide functionalized coordination polymer (Eu@BUC-14) by doping Eu cations to BUC-14 nanocrystals. This Eu functionalized hybrid (Eu@BUC-14) presents excellent luminescence features of Eu ion that originated from efficient energy transfer from the ligand. The detection results show that Eu@BUC-14 is a highly efficient luminescent probe for phosphate detection in aqueous solutions, exhibiting high sensitivity with a low detection limit of 0.88 μM and a short response time of within 5 min. More significantly, Eu@BUC-14 has a high specificity for PO over fifteen other pollutant anions and eleven metal cations. The sensing mechanism is proposed via an in-depth analysis of the interaction between PO and Eu. Simultaneously, it displays high adsorption ability toward PO (57.9 mg P/g), making it an outstanding multifunctional material. And the adsorption process plays an important role in preconcentration of PO which can lead to a quick fluorescent response with high quenching efficiency. The practicality of Eu@BUC-14 was also validated by sensing PO in real environment water samples.
磷酸盐由于对生物具有生长刺激效应，其在水中的含量过高会导致严重的富营养化。传统的磷酸盐检测方法基于复杂的仪器，耗时较长。在这里，我们报告了一种通过掺杂 Eu 阳离子到 BUC-14 纳米晶体中制备的发光镧系功能化配位聚合物（Eu@BUC-14）。这种 Eu 功能化的杂化材料（Eu@BUC-14）表现出 Eu 离子的优异发光特性，源于配体的高效能量转移。检测结果表明，Eu@BUC-14 是一种高效的水溶液中磷酸盐检测的荧光探针，具有高灵敏度，检测限低至 0.88 μM，响应时间短至 5 分钟内。更重要的是，Eu@BUC-14 对 PO 具有很高的选择性，超过十五种其他污染物阴离子和十一种金属阳离子。通过深入分析 PO 和 Eu 之间的相互作用，提出了传感机制。同时，它对 PO 具有高吸附能力（57.9 mg P/g），使其成为一种出色的多功能材料。吸附过程在 PO 的预浓缩中起着重要作用，可导致具有高猝灭效率的快速荧光响应。Eu@BUC-14 的实用性也通过在实际环境水样中检测 PO 得到了验证。
