High surface area hypercrosslinked microporous organic polymer networks based on tetraphenylethylene for CO₂ capture

Abstract

A series of hypercrosslinked microporous organic copolymer networks was synthesized via Friedel–Crafts alkylation of tetraphenylethylene (TPE) and/or 1,1,2,2-tetraphenylethane-1,2-diol (TPD) promoted by anhydrous FeCl3.

Synthesis of nanoporous hypercrosslinked polyaniline (HCPANI) for gas sorption and electrochemical supercapacitor applications

“…The HCPANI could reversibly capture 3.52 mmol.g -1 (15.5 wt%) of CO 2 at 273 K and 1 bar (Fig. 30,31 This indicates that the Lewis acidic and Lewis basic interaction between CO 2 and amine groups of HCPANI, and surface dipole interaction play important role. At 298 K, the CO 2 capture capacity becomes 2.15 mmol.g -1 (9.5 wt%).…”

“…Thus, the hypercrosslinking has enhanced the specific surface area of EBPANI to more than 24 times. 8,30,31 Moreover, the facile synthesis, high thermal stability and low cost of the monomer units have major advantages over many other nanoporous materials with higher CO 2 capture capacity. The moderately high surface area, ultra small pore size and presence of the nitrogen atoms with lone pair of electrons in the HCPANI frameworks prompted us to study the CO 2 capture properties.…”

Facile Carbonization of Microporous Organic Polymers into Hierarchically Porous Carbons Targeted for Effective CO2 Uptake at Low Pressures

“…This may be attributed to the combination of the improved micropore volume (up to 0.68 cm 3 g -1 ) and the hierarchically porous structure, which 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 makes that ultramicropores more efficient for the kinetic CO 2 molecules in the adsorption process. Notably, at 273 K and 1 bar, MOP-8C presents a high CO 2 uptake up to 214 mg g -1 , which surpasses most of the known porous organic polymers and the porous carbon materials, such as CPOPs (182 mg g -1 ), [45][46] HCPs (181 mg g -1 ), [47][48] CTFs (143 mg g -1 ), 49 CMPs (122 mg g -1 ), 50 nitrogen-doped graphene (114 mg g -1 ), 51 HPNCs (207 mg g -1 ). 52 Moreover, this value could also be comparable with those of the porous carbon materials with high pore volume and nitrogen content, for example microporous carbon TPC-1 (216 mg g -1 ) 53 with a pore volume of 1.23 cm 3 g -1 and a nitrogen content of 20.87 wt%, and mesoporous carbon OMC (132 mg g -1 at 278K) 54 with a pore volume of 2.17 cm 3 g -1 .…”

Direct Carbonization of Cyanopyridinium Crystalline Dicationic Salts into Nitrogen-Enriched Ultra-Microporous Carbons toward Excellent CO2 Adsorption

“…The comparison indicates that the CO 2 /N 2 selectivity over PCN-14 is superior to the values of all the reported porous carbons, including templated carbons, 9,10,35,37 chemical activated carbons, 38,40,62 and IL-, MOP-or MOF-derived carbons, 15,16,18,31,47,59 even higher than those of the recently reported highest values over porous organic polymers, e.g., electron-rich oganoniridic framework PECONF-1 (109), 32 azo-covalent organic polymer azo-COP-2 (109.6), 33 benzimidazole-linked porous polymer BILP-2 (113), 63 pyrrole-HCP (117), 64 and Network-7 (119). 65 We note that those MOP materials with high CO 2 /N 2 selectivities often exhibited moderate CO 2 uptakes (2−3 mmol g −1 , 273 K, 1.0 bar, Table S4). In clear contrast, the current sample PCN-14 simultaneously possesses a high CO 2 uptake of 5.33 mmol g −1 , an ultrahigh CO 2 /N 2 adsorption ratio (148), and a selectivity (156) at 273 K, which is very impressive in the studies of CO 2 adsorption.…”