Jiang Xiaowen, Zhao Junteng, Yu Tong, He Xiwen, Chen Langxing, Zhang Yukui
College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Nankai University, Tianjin 300071, China.
College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Nankai University, Tianjin 300071, China; Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116011, China.
J Hazard Mater. 2025 Aug 15;494:138616. doi: 10.1016/j.jhazmat.2025.138616. Epub 2025 May 13.
Developing multifunctional adsorbents with exceptional capture performance and outstanding stability is significant for pollutant removal. Olefin-linked sp² carbon-conjugated covalent organic frameworks (sp²c-COFs) exhibit high chemical stability and robust framework properties. This work developed a facile in-situ growth strategy to synthesize sp²c-COF films on polyacrylonitrile (PAN) nanofibers via aldol condensation. The abundant nucleation sites on the surface of functionalized PAN nanofibers (APAN) facilitated the synthesis of sp²c-COF nanofibers (APAN@TMT-TFPT) through a surface-mediated condensation reaction between 2,4,6-trimethyl-1,3,5-triazine (TMT) and 1,3,5-tris(4-formylphenyl) triazine (TFPT). APAN@TMT-TFPT exhibited a high specific surface area, porosity, and exceptional chemical stability, rendering it a highly promising adsorbent for aqueous environments. APAN@TMT-TFPT demonstrated exceptional adsorption performance for bisphenol A (BPA), and the adsorption behavior conformed to the Langmuir model, with a maximum adsorption capacity of 284.98 mg g. The abundant benzene rings and triazine units in APAN@TMT-TFPT provide numerous active sites for BPA interaction, while the robust sp²c-COF framework and macroscopic membrane structure ensure excellent reusability and recyclability. Notably, the in-situ growth of COFs on nanofibers proposed in this work can be extended to construct other highly stable sp²c-COF-based nanofiber membranes.
开发具有卓越捕获性能和出色稳定性的多功能吸附剂对于去除污染物具有重要意义。烯烃连接的sp²碳共轭共价有机框架（sp²c-COFs）表现出高化学稳定性和坚固的框架特性。这项工作通过羟醛缩合反应，开发了一种简便的原位生长策略，用于在聚丙烯腈（PAN）纳米纤维上合成sp²c-COF薄膜。功能化PAN纳米纤维（APAN）表面丰富的成核位点通过2,4,6-三甲基-1,3,5-三嗪（TMT）和1,3,5-三（4-甲酰基苯基）三嗪（TFPT）之间的表面介导缩合反应，促进了sp²c-COF纳米纤维（APAN@TMT-TFPT）的合成。APAN@TMT-TFPT具有高比表面积、孔隙率和出色的化学稳定性，使其成为水性环境中极具前景的吸附剂。APAN@TMT-TFPT对双酚A（BPA）表现出卓越的吸附性能，吸附行为符合朗缪尔模型，最大吸附容量为284.98 mg g。APAN@TMT-TFPT中丰富的苯环和三嗪单元为BPA相互作用提供了众多活性位点，而坚固的sp²c-COF框架和宏观膜结构确保了优异的可重复使用性和可回收性。值得注意的是，这项工作中提出的COFs在纳米纤维上的原位生长可以扩展到构建其他高度稳定的基于sp²c-COF的纳米纤维膜。
