Amino-Functionalized Porphyrin-Based Porous Organic Polymers for CO2 Capture and Hg2+ Removal

• Published in: Energy & fuels Vol. 34; no. 8; pp. 9771 - 9778
• Main Authors: Jiangfei, Guo, Lizhi, Wang, Zhang, Du, Huang, Jianhan
• Format: Journal Article
• Language: English
• Published: American Chemical Society 20.08.2020
• Subjects: acylation; adsorption; carbon dioxide; crosslinking; energy; Environmental and Carbon Dioxide Issues; imines; melamine; porosity; schiff bases; surface area
• ISSN: 0887-0624; 1520-5029; 1520-5029
• DOI: 10.1021/acs.energyfuels.9b04206

Functionalized porous organic polymers (POPs) with high Brunauer–Emmett–Teller (BET) surface area (S BET) and unique porosity are promising for CO2 capture and Hg2+ removal, although their facile synthesis remains a challenge. Herein, a kind of novel amino-functionalized porphyrin-based POPs was developed based on the Friedel–Craft acylation reaction and Schiff-base reaction, and melamine was adopted as both the rigid cross-linking bridges and the amino-functionalized agent for the construction of the polymers. The resultant polymers exhibited high S BET (587 m2/g) and pore volume (0.46 cm3/g) with abundant amino, imine, and triazine functionalities (42.08 wt %). The CO2 uptake reached 172 mg/g at 273 K and 1.0 bar and the maximum Hg2+ capacity reached 328.1 mg/g. In particular, the characteristic hierarchical micro/mesoporosity of the polymers was beneficial for the kinetic adsorption due to the fast diffusion of Hg2+ in the pore channels. This study offers a facile postfunctionalization strategy to fabricate the functionalized POPs with high surface area and unique hierarchical porosity.