Du Ziwei, Wang Zhixuan, Wang Ruoting, Liu Chao
Department State Key Laboratory of New Pharmaceutical Preparations and Excipients, College of Chemistry and Materials Science, Hebei University, Baoding, 071002, China.
Chem Asian J. 2025 Feb 17;20(4):e202401471. doi: 10.1002/asia.202401471. Epub 2024 Dec 23.
Clean energy nuclear power generation is always accompanied by the release of harmful radioactive iodine. Therefore, developing efficient adsorbents has become a universal strategy to deal with this problem. Two distinct porous organic polymers (BTM-POP and DAB-POP) containing dipyridine units and benzimidazole structure were synthesized by 5,5'-([2,2'-bipyridine]-5,5'-diyl) diisophthalaldehyde with 1,2,4,5-benzenetetramine (BTM) or 3,3'-diaminobenzidine (DAB), respectively. The structures and morphologies of BTM-POP and DAB-POP were confirmed through Fourier transform infrared (FT-IR) spectroscopy, N sorption isotherm measurement and scanning electron microscopy (SEM). Furthermore, iodine vapor capture of BTM-POP and DAB-POP reach 3.26 g g and 3.58 g g, respectively. Mechanism study reveals that the adsorbed iodine in the material mainly exists in the form of I and I and the adsorption sites are mainly bipyridine and benzimidazole units. The results show that two POPs exhibit good thermal/chemical stability, high pore properties, and offer more adsorption sites. In combination with rich N atom content, large conjugated structure, synergistically influences the iodine vapor capture capacity of POPs.
清洁能源核能发电总是伴随着有害放射性碘的释放。因此，开发高效吸附剂已成为解决这一问题的通用策略。通过5,5'-([2,2'-联吡啶]-5,5'-二基)二间苯二甲醛分别与1,2,4,5-苯四胺（BTM）或3,3'-二氨基联苯胺（DAB）合成了两种含联吡啶单元和苯并咪唑结构的不同多孔有机聚合物（BTM-POP和DAB-POP）。通过傅里叶变换红外（FT-IR）光谱、N吸附等温线测量和扫描电子显微镜（SEM）对BTM-POP和DAB-POP的结构和形貌进行了确认。此外，BTM-POP和DAB-POP对碘蒸气的捕获量分别达到3.26 g g和3.58 g g。机理研究表明，材料中吸附的碘主要以I 和I 的形式存在，吸附位点主要是联吡啶和苯并咪唑单元。结果表明，两种多孔有机聚合物表现出良好的热/化学稳定性、高孔隙率特性，并提供了更多的吸附位点。结合丰富的N原子含量、大共轭结构，协同影响多孔有机聚合物对碘蒸气的捕获能力。
