Carbonate-based hyper-cross-linked polymers with pendant versatile electron-withdrawing functional groups for CO adsorption and separation
The simple and highly efficient preparation of porous hyper-cross-linked polymers (HCPs) with high surface area and manifold functionalities for high-performance CO 2 uptake and selective separation has drawn significant attention in the past decade. Herein, three low-cost carbonates rich in electro...
Saved in:
Published in | Journal of materials chemistry. A, Materials for energy and sustainability Vol. 1; no. 28; pp. 1562 - 1573 |
---|---|
Main Authors | , , , , |
Format | Journal Article |
Published |
19.07.2022
|
Online Access | Get full text |
Cover
Loading…
Summary: | The simple and highly efficient preparation of porous hyper-cross-linked polymers (HCPs) with high surface area and manifold functionalities for high-performance CO
2
uptake and selective separation has drawn significant attention in the past decade. Herein, three low-cost carbonates rich in electron-withdrawing carbonyl and ester groups, fluorine atoms and electron-donating heteroatoms such as N, were used as building blocks to fabricate a series of novel and functional HCPs
via
the typical one-step Friedel-Crafts alkylation reaction under mild conditions, which has been scarcely reported to date. The resulting functional polymers were permanently microporous and the polymer enriched with nitrogen atoms and carbonyl and ester groups possessed the highest BET surface area of 1367 m
2
g
−1
, Langmuir surface area of up to 2058 m
2
g
−1
, CO
2
uptake of 14.61 wt% at 273.15 K/1.00 bar, H
2
adsorption of 1.28 wt% at 77.3 K/1.00 bar, and CH
4
storage of 1.79 wt% at 273.15 K/1.00 bar. Besides, the structurally accessible functional groups and heteroatoms were able to endow the resultant polymers with improved gas adsorption selectivity for CO
2
/N
2
(20.16) and CO
2
/CH
4
(41.84) at 273.15 K and a low-pressure coverage of less than 0.3 bar according to Henry's law (initial slope ratio). In addition, it was found that by fine tuning the molecular structure of the employed building blocks, the texture property and gas capturing capacity of the obtained polymers can also be rationally tuned, and detailed insight from the viewpoint of structure-property relationships has been provided.
The simple and highly efficient preparation of porous hyper-cross-linked polymers (HCPs) with high surface area and manifold functionalities for high-performance CO
2
uptake and selective separation has drawn significant attention in the past decade. |
---|---|
Bibliography: | 2 https://doi.org/10.1039/d2ta02774g 4 CH and CO Electronic supplementary information (ESI) available: FT-IR of carbonate building blocks, SEM and TEM of carbonate-based polymers, TGA analysis of obtained polymers, pore distribution and pore size distribution calculated using NLDFT methods of the prepared porous organic polymers, adsorption selectivity of CO for the polymers calculated by employing the Henry's law initial slope method according to their adsorption isotherms of CO and CH at 273.15 K and 298.15 K, content of different elements for porous hyper-cross-linked polymers based on the elemental analysis and parent building blocks by theoretical calculation, the equation used for calculating the yield of the synthesized polymers, and the formula employed to determine the elemental content of the building-block molecules. See N |
ISSN: | 2050-7488 2050-7496 |
DOI: | 10.1039/d2ta02774g |