The development of uranyl ion detection technology has exhibited its significance in public security and environmental fields for the radioactivity and chemical toxicity of uranyl ion. The WHO standard of uranyl ion makes it necessary to develop highly sensitive uranyl rapid warning system in drinking water monitoring. Herein, a visualized rapid warning system for trace uranyl ion is carried out based on electrochemiluminescence (ECL) imaging technology to give an ultra-low limit of detection (LOD) and high selectivity. Amidoxime, a bi-functional group with both uranyl ion capturing and co-reactive functions, is modified on a conjugated polymer backbone with strong ECL signal to be prepared into three-in-one polymer nanoparticles (PNPs) with self-enhanced ECL property. The captured uranyl ion can enhance the ECL signal of PNPs via resonance energy transfer process to give the LOD as 0.5 ng/L, which is much lower than the known luminescent uranyl sensors. Furthermore, ECL imaging technology is introduced into realizing visualized uranyl rapid warning, and can be successfully applied on natural water samples. This study provides a novel strategy for uranyl rapid warning, and shows its potential meaning in public security and environmental fields.

铀酰离子检测技术的发展对铀酰离子的放射性和化学毒性在公共安全和环境领域具有重要意义。WHO的铀酰离子标准使得开发高灵敏度的铀酰快速预警系统成为饮用水监测的必要条件。本文基于电化学发光（ECL）成像技术进行微量铀酰离子可视化快速预警系统，具有超低检测限（LOD）和高选择性。胺肟是一种兼具铀酰离子捕获和共反应功能的双官能团，在具有强 ECL 信号的共轭聚合物骨架上进行改性，可制备成具有自增强 ECL 性能的三合一聚合物纳米粒子 (PNPs)。捕获的铀酰离子可以增强 PNPs 的 ECL 信号通过共振能量转移过程得到的 LOD 为 0.5 ng/L，远低于已知的发光铀酰传感器。此外，将ECL成像技术引入实现可视化铀酰快速预警，可成功应用于天然水样。该研究为铀酰快速预警提供了一种新的策略，并显示了其在公共安全和环境领域的潜在意义。