Nitrogen-doped microporous carbon materials derived from DBU-modified carboxylic acid polymers for CO2 capture
Nitrogen-doped microporous carbon materials derived from DBU-modified carboxylic acid polymers for CO2 capture
复制标题
用于 CO2 捕获的 DBU 改性羧酸聚合物衍生的氮掺杂微孔碳材料
DOI：
10.1016/j.jece.2022.107849
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发表时间：
2022-06
期刊：
影响因子：
--
通讯作者：
Guofeng Guan
中科院分区：
文献类型：
--
作者：
Kai Ge;Yuting He;Wenyi Cai;Linyan Cheng;Cheng Fang;Jing Ding;Hui Wan;Guofeng Guan
以1，8-二氮杂双环[5.4.0]十一碳-7-烯改性的羧酸聚合物（PDA-DBU）为原料，在不添加活化剂的条件下，通过碳化反应制备了氮掺杂的微孔炭材料。DBU的引入不仅增加了炭材料表面氮含量，增强了炭材料本身的碱性吸附位，而且提高了其比表面积和孔容。因此，在25 °C、1bar下，非活性多孔炭（PDA-DBU-800）的CO2捕集容量为2.98mmol·g-1，基于IAST吸附溶液理论的CO2吸附选择性为27.3（CO2/N2 =85：15）。动态穿透实验进一步证实了PDA-DBU吸附剂对CO2具有良好的选择性吸附能力。此外，PDA-DBU还具有良好的稳定性和可重用性。DBU改性羧酸聚合物制备的微孔碳材料是一种潜在的CO2捕集材料。在不添加活化剂的情况下，通过碳化PDA-DBU制备了氮掺杂微孔炭材料。PDA-DBU-800在25 °C、1bar下的CO2捕集容量为2.98mmol·g-1，CO2吸附选择性为27.3（CO2/N2 =85：15），与已报道的碳基吸附剂相当甚至更好。·制备了PDA-DBU衍生的氮掺杂微孔碳材料。·DBU的引入增加了活性炭的表面氮含量，增加了活性炭的骨架，增加了活性炭的生成量。微孔与碱性中心的协同作用提高了CO2的吸附容量和选择性。
Nitrogen-doped microporous carbon materials were fabricated by carbonization of 1,8-diazabicyclo[5.4.0undec-7-ene modified carboxylic acid polymers (PDA-DBU) without extra additional activators. The introduction of DBU could not only increase surface nitrogen content that enhanced the alkaline adsorption sites of carbon material itself, but also improved its specific surface area and pore volume. Therefore, CO 2 capture capacity of the nonactivated porous carbon (PDA-DBU-800) was 2.98 mmol·g −1 under 1 bar at 25 °C and the CO 2 adsorption selectivity based on the IAST adsorbed solution theory was 27.3 (CO 2 /N 2 =85:15). Meanwhile, the dynamic breakthrough experiment further confirmed that PDA-DBU adsorbent exhibited good selective adsorption capacity for CO 2 . Furthermore, PDA-DBU owned a great stability and reusability. The microporous carbon materials derived from DBU-modified carboxylic acid polymers will be a potential candidate for CO 2 capture. Nitrogen-doped microporous carbon materials were fabricated by carbonization of PDA-DBU without extra additional activators. The CO 2 capture capacity of PDA-DBU-800 was 2.98 mmol·g −1 under 1 bar at 25 °C and the CO 2 adsorption selectivity was 27.3 (CO 2 /N 2 =85:15), which was comparable or even better than those of the reported carbon-based adsorbents. • PDA-DBU derived nitrogen-doped microporous carbon materials were fabricated. • The introduction of DBU increased surface nitrogen content, activated carbon skeleton and generated micropore. • The synergy between micropores and basic sites enhanced CO 2 adsorption capacity and selectivity.
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影响因子：
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作者：
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通讯作者：
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DOI：
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发表时间：
2021-01-31
期刊：
Molecules (Basel, Switzerland)
影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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