Synthesis of a new magnetic porous organic polymer as an efficient hybrid nanocomposite for CO2 capture

One of the main causes of climate change and global warming is the rising of carbon dioxide (CO 2 ) in the atmosphere. In response to this issue, there has been a global effort to develop various technologies for CO 2 adsorption. Porous organic polymers (POPs) are a crucial type of organic porous materials that have shown significant promise as CO 2 sorbents. In this study, a Phloroglucinol-based magnetic porous organic polymer (Ph-MPOP) was successfully created through a catalyst-free Schiff base condensation process involving 4,4′-oxydianiline and a novel trisaldehyde in the presence of magnetic nanoparticles (Fe 3 O 4 @SiO 2 ) in dimethylformamide (DMF) under solvothermal conditions. The structural properties of Ph-MPOP were characterized using different methods including Fourier-transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), field emission scanning electron microscope (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), vibrating sample magnetometry (VSM) and Brunauer-Emmett-Teller (BET) surface area analysis. This porous polymer contains a high heteroatom (N and O) content, providing accessible basic sites for CO 2 adsorption. This magnetic porous organic polymer showed a CO 2 adsorption capacity of 28.55 cm 3 g −1 and 18.50 cm 3 g −1 at 273 and 298 K under 1 bar pressure, respectively. This research aims to introduce magnetic porous organic polymers as an efficient adsorbent for capturing gas pollutants and their potential incorporation in nanocomposites and membranes. This could offer a promising solution to combat atmospheric pollution and global warming. • A new phloroglucinol-based magnetic porous organic polymer (Ph-MPOP) was synthesized through Schiff base condensation. • Ph-MPOP contains a high heteroatom (N and O) content as basic cites for CO 2 capture. • This nanocomposite showed a CO 2 adsorption capacity of 28.55 cm 3 g -1 and 18.05 cm 3 g -1 at 273 and 298 K.