Investigation on Regulating Porous Polymers with Suitable Porosities and/or N-Doping for Enhanced CO₂ Capture

Variouscost-effective polycyclic aromatic hydrocarbons (PAHs)were used to fabricate hyper-cross-linked polymers (HCLPs) via anexternal cross-linker knitting method (ECLKM) followed by N-sourceimpregnation modification. Multiple characterization techniques andthorough tests confirmed that the resultant thermally stable materialsfeatured large specific surface areas (up to 2870 m(2) g(-1)), narrow pore distributions (<0.70 nm), and highpore volumes (up to 1.09 cm(3)/g). Effects of porositiesand N-doping modification ways on HCLPs' CO2 capturecapacities have been fully studied via controlling experiments. Remarkably,HCLP 1 prepared using naphthalene without further modification possessedthe highest CO2 uptake capacity (up to 3.8 mmol g(-1)), indicating that porosities dominated the CO2 uptakeprocess of HCLPs compared with N-doping modification. This study offersa facile strategy to construct HCLPs with great CO2 captureperformances using PAHs via a simple one-pot ECLKM.