Abdelnaby Mahmoud M, Saleh Tawfik A, Zeama Mostafa, Abdalla Mahmoud Atef, Ahmed Hossam M, Habib Mohamed A
Interdisciplinary Research Center for Hydrogen and Energy Storage (IRC-HES), King Fahd University of Petroleum and Minerals (KFUPM), Dhahran 31261 Saudi Arabia.
Department of Chemistry, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran 31261, Saudi Arabia.
ACS Omega. 2022 Apr 21;7(17):14535-14543. doi: 10.1021/acsomega.1c05905. eCollection 2022 May 3.
The facile and environmentally friendly synthesis of porous organic polymers with designed polar functionalities decorating the interior frameworks as an excellent adsorbent for selective carbon dioxide capture and metal ion removal is a target worth pursuing for environmental applications. In this regard, two azo-linked porous organic polymers denoted man-Azo-P1 and man-Azo-P2 were synthesized in water by the azo-linking of 4,4'-diaminobiphenyl (benzidine) and 4,4'-methylenedianiline, respectively, with 1,3,5-trihydroxybenzene. The resulting polymers showed good BET surface areas of 290 and 78 m g for man-Azo-P1 and man-Azo-P2, respectively. Due to the enriched core functionality of the azo (-N=N-) and hydroxyl groups along with the porous frameworks, man-Azo-P1 exhibited a good CO uptake capacity of 32 cm g at 273 K and 1 bar, in addition to the remarkable removal of lead (Pd), chromium (Cr), arsenic (As), nickel (Ni), copper (Cu), and mercury (Hg) ions. This performance of the synthesized man-Azo-P1 and man-Azo-P2 in the dual application of CO capture and heavy metal ion removal highlights the unique properties of azo-linked POPs as excellent and stable sorbent materials for the current challenging environmental applications.
合成具有设计的极性官能团修饰内部骨架的多孔有机聚合物作为用于选择性捕获二氧化碳和去除金属离子的优异吸附剂,这种简便且环境友好的合成方法是环境应用中值得追求的目标。在这方面,通过将4,4'-二氨基联苯(联苯胺)和4,4'-亚甲基二苯胺分别与1,3,5-三羟基苯进行偶氮连接,在水中合成了两种偶氮连接的多孔有机聚合物,分别记为man-Azo-P1和man-Azo-P2。所得聚合物的BET表面积分别为man-Azo-P1的290 m²/g和man-Azo-P2的78 m²/g。由于偶氮基(-N=N-)和羟基的核心官能团富集以及多孔骨架,man-Azo-P1在273 K和1 bar下表现出32 cm³/g的良好CO₂吸附容量,此外还能显著去除铅(Pb)、铬(Cr)、砷(As)、镍(Ni)、铜(Cu)和汞(Hg)离子。合成的man-Azo-P1和man-Azo-P2在CO₂捕获和重金属离子去除双重应用中的这种性能突出了偶氮连接的多孔有机聚合物作为当前具有挑战性的环境应用中优异且稳定的吸附剂材料的独特性能。