Liquid acid-catalysed fabrication of nanoporous 1,3,5-triazine frameworks with efficient and selective CO2 uptake

Abstract

New classes of nanoporous organic polymers based on 1,3,5-triazine units (NOP-1-6) were synthesized via a straightforward, methane-sulfonic acid-catalysed, cost-effective Friedel-Crafts reaction of 2,4,6trichloro-1,3,5-triazine and tetrahedral building blocks. Among them, NOP-3 with a Brunauer-Emmet-Teller (BET) specific surface area up to 894 m 2 g À1 and the total volume exceeding 0.41 m 3 g À1 exhibits good hydrogen adsorption capacity (up to 1.14 wt% at 77 K/1.0 bar) and high carbon dioxide uptake (up to 11.03 wt% at 273 K/1.0 bar). Furthermore, it presents an effective selectivity for CO 2 adsorption (NOP-6, CO 2 /N 2 selectivity 38.7 at 273 K/1.0 bar), demonstrating potential applications in gas adsorption and separation.

Covalent triazine polymers using a cyanuric chloride precursor via Friedel–Crafts reaction for CO2 adsorption/separation

“…9a). This adsorption capacity of PCTP-1 was higher than that for the previously reported MOFs and POPs [38][39][40][41][42][43][44][45][46][47][48][49][50][51]. Notable examples include, Zn TEPO-1-3 (69.7-91.9 mg g -1 ) [46], carbon coating mesoporous carbon nitride (134.2 mg g -1 ) [47], and others [48][49][50][51].…”

Combined CO2-philicity and Ordered Mesoporosity for Highly Selective CO2 Capture at High Temperatures

“…2, 3, 7, 18 om-ph-MR exhibited high selectivity as well as an unusual trend of selectivity increase upon the temperature rise (insets of Figures 5A-C): the Henry selectivity increased from 65 to 100 to 117 ( Figure S10), as the temperature went from 273 K to 298 K to 323 K. The ideal adsorption solution theory (IAST) 53 selectivities ( Figures S11-13 and Tables S3-S4) were consistent with the Henry's selectivities. Remarkably, the selectivities at 323 K, 95 (IAST) and 117 (Henry), are higher than those of most of other porous polymers 48,49,[54][55][56][57][58][59][60][61][62][63][64][65][66][67] reported to date as summarized in Table S5. The anomalous selectivity increase with the temperature can be explained by both CO 2 -philicity and meso-porosity, and can be clarified further by a systematic comparison with the other two samples.…”

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

“…[1][2][3] Recently, sorbents with large surface areas, high CO 2 capture capabilities and excellent regeneration abilities are abstracting more and more attention for the separation of CO 2 from N 2 in flue or natural gas. For this purpose, various porous solids including zeolites, 4 metal organic frameworks (MOFs), 5 porous 3 carbon 6 and microporous organic polymers (MOPs) [7][8][9] have been synthesized. They have also found to be of great potential for utilities in water treatment, 10 energy storage, 11 gas adsorption 12 and drug delivery.…”