A protophilic solvent‐assisted solvothermal approach to Cu‐BTC for enhanced CO2 capture |
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Authors: | Fujiao Song Qin Zhong Yunxia Zhao |
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Institution: | 1. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, People's Republic of China;2. Nanjing AIREP Environmental Protection Technology Co. Ltd, Nanjing, Jiangsu, People's Republic of China |
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Abstract: | 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. 1H 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 CO2 adsorption isotherms were used to measure the surface area and CO2 adsorption capacities. The CO2 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 CO2 adsorption performance. Therefore, adsorbents synthesized using the protophilic solvent‐assisted solvothermal method exhibit excellent CO2 adsorption performance. Copyright © 2015 John Wiley & Sons, Ltd. |
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Keywords: | protophilic solvent Cu‐BTC surface area activation degree CO2 adsorption |
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