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Hydrothermal synthesis of nitrogen-doped ordered mesoporous carbon via lysine-assisted self-assembly for efficient CO2 capture
RSC Advances ( IF 3.9 ) Pub Date : 2020-1-15 , DOI: 10.1039/c9ra09983b Xia Wan 1, 2 , Yuchen Li 1, 2 , Huining Xiao 3 , Yuanfeng Pan 4 , Jie Liu 1, 2
RSC Advances ( IF 3.9 ) Pub Date : 2020-1-15 , DOI: 10.1039/c9ra09983b Xia Wan 1, 2 , Yuchen Li 1, 2 , Huining Xiao 3 , Yuanfeng Pan 4 , Jie Liu 1, 2
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Nitrogen-doped ordered mesoporous carbons (NOMCs) were synthesized by single-step hydrothermal self-assembly using F127 as a soft template, hexamine as a formaldehyde source, L-lysine as a polymerization catalyst, and 3-aminophenol as both carbon and nitrogen sources. The microstructure of the NOMCs was characterized by XRD, N2 adsorption/desorption, TEM, FTIR, and XPS. The results indicated that the obtained NOMCs exhibited a large specific surface area, uniform pore size distribution and highly ordered 2-D hexagonal mesostructure (P6mm). Besides, the nitrogen was uniformly doped into the carbon framework in the form of various nitrogen species. The adsorption isotherms of CO2 and N2 were also determined and could be well fitted by a DSL model. The capture capacity of CO2 was affected by both the nitrogen content and mesostructure of the adsorbents. Overall, NOMC-L-0.5 displayed excellent CO2 capture capacity (0 °C, 3.32 mmol g−1; 25 °C, 2.50 mmol g−1), and still demonstrated great regenerability with only 2% loss after several CO2 adsorption/desorption cycles. Moreover, the CO2/N2 selectivity calculated by IAST was as high as 43.2 at 25 °C in a typical composition of flue gas (binary mixtures with 15% CO2). The superior adsorption performance enables NOMCs to be a promising CO2 adsorbent in practical applications.
中文翻译：
通过赖氨酸辅助自组装水热合成氮掺杂有序介孔碳以有效捕获二氧化碳
以F127为软模板、乌洛托品为甲醛源、 L-赖氨酸为聚合催化剂、3-氨基苯酚为碳源和氮源，通过一步水热自组装法合成了氮掺杂有序介孔碳（NOMCs） 。通过X射线衍射、N 2吸附/解吸、TEM、FTIR和XPS对NOMCs的微观结构进行了表征。结果表明，所获得的NOMCs具有较大的比表面积、均匀的孔径分布和高度有序的二维六方介观结构（ P 6 mm ）。此外，氮以各种氮物种的形式均匀地掺杂到碳骨架中。还确定了CO 2和N 2的吸附等温线，并且可以通过DSL模型很好地拟合。 CO 2的捕获能力受到氮含量和吸附剂介观结构的影响。总体而言，NOMC-L-0.5表现出优异的CO 2捕获能力（0 °C，3.32 mmol g -1 ；25 °C，2.50 mmol g -1 ），并且仍然表现出良好的再生能力，在多次CO 2吸附后仅损失2% /解吸循环。此外，在典型的烟气成分（含15%CO 2的二元混合物）中，通过IAST计算的CO 2 /N 2选择性在25℃下高达43.2。 优异的吸附性能使NOMCs成为实际应用中很有前景的CO 2吸附剂。
更新日期：2020-01-15
中文翻译：
通过赖氨酸辅助自组装水热合成氮掺杂有序介孔碳以有效捕获二氧化碳
以F127为软模板、乌洛托品为甲醛源、 L-赖氨酸为聚合催化剂、3-氨基苯酚为碳源和氮源，通过一步水热自组装法合成了氮掺杂有序介孔碳（NOMCs） 。通过X射线衍射、N 2吸附/解吸、TEM、FTIR和XPS对NOMCs的微观结构进行了表征。结果表明，所获得的NOMCs具有较大的比表面积、均匀的孔径分布和高度有序的二维六方介观结构（ P 6 mm ）。此外，氮以各种氮物种的形式均匀地掺杂到碳骨架中。还确定了CO 2和N 2的吸附等温线，并且可以通过DSL模型很好地拟合。 CO 2的捕获能力受到氮含量和吸附剂介观结构的影响。总体而言，NOMC-L-0.5表现出优异的CO 2捕获能力（0 °C，3.32 mmol g -1 ；25 °C，2.50 mmol g -1 ），并且仍然表现出良好的再生能力，在多次CO 2吸附后仅损失2% /解吸循环。此外，在典型的烟气成分（含15%CO 2的二元混合物）中，通过IAST计算的CO 2 /N 2选择性在25℃下高达43.2。 优异的吸附性能使NOMCs成为实际应用中很有前景的CO 2吸附剂。
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