Zhang Guo-Hao, Zhu Qiu-Hong, Guo Shi-Jie, Zhang Lei, Yu Chao, Qin Song, He Ling, Tao Guo-Hong
College of Chemistry, Sichuan University, Chengdu, 610064, China.
School of National Defence Science and Technology, Southwest University of Science and Technology, Mianyang, 621010, China.
Adv Mater. 2024 Apr;36(14):e2311990. doi: 10.1002/adma.202311990. Epub 2024 Jan 4.
Along with the development of nuclear power, concerns about radioactive emissions and the potential for nuclear leakage have been widely raised, particularly of harmful iodine isotopes. However, as a significant component of nuclear air waste, the enrichment and detection of air-dispersed gaseous iodine remain a challenge. In this work, it is focused on developing an attraction-immobilization-detection strategy-based fluorescence method for the on-site detection of volatile iodine, by employing a photoluminescent ionic polyimine network-polyvinylpyrrolidone (IPIN-PVP) composite membrane. This strategy synergizes ion-induced dipole interactions from IPIN and complexation effects from PVP, allowing effective iodine enrichment and immobilization. As a result, the optimized IPIN-PVP membrane exhibits rapid response times of 5 s and a low detection limit of 4.087 × 10 m for gaseous iodine. It also introduces a portable handheld detection device that utilizes the composite membrane, offering a practical solution for real-time on-site detection of volatile iodine. This innovation enhances nuclear safety measures and disaster management by providing rapid and reliable iodine detection capabilities.
随着核能的发展，人们对放射性排放以及核泄漏的可能性广泛表示担忧，尤其是对有害碘同位素。然而，作为核空气废物的重要组成部分，空气中分散的气态碘的富集和检测仍然是一项挑战。在这项工作中，重点是开发一种基于吸引 - 固定 - 检测策略的荧光方法，用于现场检测挥发性碘，采用光致发光离子型聚亚胺网络 - 聚乙烯吡咯烷酮（IPIN - PVP）复合膜。该策略将IPIN的离子诱导偶极相互作用与PVP的络合效应协同起来，实现有效的碘富集和固定。结果，优化后的IPIN - PVP膜对气态碘的响应时间快至5秒，检测限低至4.087×10 米。它还推出了一种利用该复合膜的便携式手持检测设备，为挥发性碘的实时现场检测提供了切实可行的解决方案。这项创新通过提供快速可靠的碘检测能力，加强了核安全措施和灾害管理。
