The use of covalent organic frameworks (COFs) to cope with environmental issues was promising but making them commercial and practical remains a challenge. In this work, we explored the crystallization of a stable nitrogen-containing covalent organic framework (TAPA-PDA COF) and used it as a porous platform for efficient and reversible volatile iodine capture. The TAPA-PDA COF, prepared by simple, rapid, low temperature reactions, possesses a high BET surface area of over 685 m²/g, good crystallinity, high thermal stability and ultrahigh capture of iodine vapor up to 5.09 g/g, which was significantly higher than most reported iodine adsorbents. Although the Raman spectroscopy confirmed the formation of polyiodide compounds through charge transfer between sorbents and iodine molecules, the TAPA-PDA COF still has the ability to be recycled five times while maintaining a high uptake capacity. This study provides promising strategy to solve the difficult problems of commercializing COFs and utilizing them for practical application.

使用共价有机框架（COF）来解决环境问题是有希望的，但使其商业化和实用化仍然是一个挑战。在这项工作中，我们探索了稳定的含氮共价有机骨架（TAPA-PDA COF）的结晶，并将其用作有效和可逆地捕获挥发性碘的多孔平台。通过简单，快速，低温反应制备的TAPA-PDA COF具有超过685 m ²的高BET表面积/ g，良好的结晶度，高的热稳定性和高达5.09 g / g的碘蒸气超高捕获率，这大大高于大多数报道的碘吸附剂。尽管拉曼光谱法证实了通过吸附剂和碘分子之间的电荷转移形成了聚碘化合物，但TAPA-PDA COF仍具有五次再循环的能力，同时保持了高吸收能力。这项研究提供了有希望的策略来解决商业化COFs并将其用于实际应用的难题。