Amine-Functionalized Covalent Organic Framework for Efficient SO2 Capture with High Reversibility

作者：Lee Gang Young; Lee Joohyeon; Huyen Thanh Vo; Kim Sangwon; Lee Hyunjoo; Park Taiho

来源：Scientific Reports, 2017, 7(1): 557.

DOI：10.1038/s41598-017-00738-z

<jats:title>Abstract</jats:title><jats:p>Removing sulfur dioxide (SO<jats:sub>2</jats:sub>) from exhaust flue gases of fossil fuel power plants is an important issue given the toxicity of SO<jats:sub>2</jats:sub> and subsequent environmental problems. To address this issue, we successfully developed a new series of imide-linked covalent organic frameworks (COFs) that have high mesoporosity with large surface areas to support gas flowing through channels; furthermore, we incorporated 4-[(dimethylamino)methyl]aniline (DMMA) as the modulator to the imide-linked COF. We observed that the functionalized COFs serving as SO<jats:sub>2</jats:sub> adsorbents exhibit outstanding molar SO<jats:sub>2</jats:sub> sorption capacity, i.e., <jats:bold>PI</jats:bold>-<jats:bold>COF</jats:bold>-<jats:bold>m10</jats:bold> record 6.30 mmol SO<jats:sub>2</jats:sub> g<jats:sup>−1</jats:sup> (40 wt%). To our knowledge, it is firstly reported COF as SO<jats:sub>2</jats:sub> sorbent to date. We also observed that the adsorbed SO<jats:sub>2</jats:sub> is completely desorbed in a short time period with remarkable reversibility. These results suggest that channel-wall functional engineering could be a facile and powerful strategy for developing mesoporous COFs for high-performance reproducible gas storage and separation.</jats:p>

• 出版日期2017-4-3