Solvothermal synthesis of hierarchically nanoporous organic polymers with tunable nitrogen functionality for highly selective capture of CO2

Kuan Huang, Fujian Liu, Sheng Dai

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84 Scopus citations

Abstract

A series of porous organic polymers (POPs) with tunable nitrogen functionality and hierarchical porosity were successfully synthesized from the one-step copolymerization of divinylbenzene with 4-vinylpyridine or 1-vinylimidazolate under solvothermal conditions. The FTIR results, XPS spectra, and elemental analysis validated the incorporation of different kinds and contents of nitrogen species into the framework-synthesized POPs. The N2 adsorption isotherms at -196 °C and SEM and TEM images revealed that the synthesized POPs have large surface areas and abundant meso-macropores. The CO2 and N2 adsorption experiments demonstrated that the synthesized POPs have competitive capacity for CO2 at a relatively low pressure of 0.15 bar (0.64-1.47 mmol g-1 at 0 °C and 0.49-0.87 mmol g-1 at 25 °C) and exceptionally high IAST selectivity for CO2/N2 (0.15/0.85) at 1 bar (74.9-154.8 at 0 °C and 91.8-224.5 at 25 °C). The CO2/N2 selectivity is superior to that of most other reported physical adsorbents. This work provides a facile approach to the targeted synthesis of nitrogen-functionalized POPs with potential applications in the selective capture of CO2 from flue gas.

Original languageEnglish
Pages (from-to)13063-13070
Number of pages8
JournalJournal of Materials Chemistry A
Volume4
Issue number34
DOIs
StatePublished - 2016

Funding

This work was supported as part of the Center for Understanding and Control of Acid Gas-Induced Evolution of Materials for Energy (UNCAGE-ME), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Award No. DESC0012577. F. L. acknowledges the ?nancial support of the National Natural Science Foundation of China (21573150, 21203122) and the Natural Science Foundation of Zhejiang Province (LY15B030002).

FundersFunder number
U.S. Department of Energy
Office of Science
Basic Energy SciencesDESC0012577
National Natural Science Foundation of China21203122, 21573150
Natural Science Foundation of Zhejiang ProvinceLY15B030002

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