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A protophilic solvent‐assisted solvothermal approach to Cu‐BTC for enhanced CO 2 capture
Author(s) -
Song Fujiao,
Zhong Qin,
Zhao Yunxia
Publication year - 2015
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.3339
Subject(s) - physisorption , chemistry , adsorption , solvent , solvothermal synthesis , crystallinity , boiling point , metal organic framework , specific surface area , dimethylformamide , raman spectroscopy , ethylenediamine , chemical engineering , nuclear chemistry , scanning electron microscope , inorganic chemistry , organic chemistry , crystallography , catalysis , materials science , physics , optics , composite material , engineering
Cu‐BTC–ethylenediamine (EDA)/polyethyleneimine (PEI) adsorbents were synthesized using a protophilic solvent‐assisted solvothermal method. EDA was introduced to enhance the degree of activation due to its lower boiling point allowing it to be removed easily compared with dimethylformamide. A contrast experiment was done by introducing PEI to the solvothermal solution considering its higher boiling point. Powder X‐ray diffraction, scanning electron microscopy and Raman spectroscopic characterizations were performed to investigate the effect of EDA/PEI on crystallinity and morphology of the adsorbents. 1 H NMR characterization and elemental analysis were performed to study the removal rate of organic guest molecules and the degree of activation. Nitrogen physical adsorption and CO 2 adsorption isotherms were used to measure the surface area and CO 2 adsorption capacities. The CO 2 adsorption mechanism of the synthesized adsorbents is mainly dependent on physisorption determined by surface area. Furthermore, open metal sites generated by the enhancement of degree of activation also promote the CO 2 adsorption performance. Therefore, adsorbents synthesized using the protophilic solvent‐assisted solvothermal method exhibit excellent CO 2 adsorption performance. Copyright © 2015 John Wiley & Sons, Ltd.