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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >DES assisted synthesis of hierarchical nitrogen-doped carbon molecular sieves for selective CO2 versus N2 adsorption
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DES assisted synthesis of hierarchical nitrogen-doped carbon molecular sieves for selective CO2 versus N2 adsorption

机译：DES辅助合成了用于选择CO2与N2吸附的分级氮掺杂碳分子筛

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Deep eutectic solvents (DESs) composed of resorcinol, 3-hydroxypyridine and tetraethylammonium bromide were used for the synthesis of hierarchical nitrogen-doped carbon molecular sieves. DESs played multiple roles in the synthetic process, as the liquid medium that ensures reagent homogenization, the structure-directing agent responsible for the achievement of the hierarchical structure, and the source of carbon and nitrogen for the solid sorbent obtained after carbonization. Thus, the synthesis offers an economy of reagents that emphasizes the green nature and low cost of conventional polycondensation. Interestingly, while macropores facilitated mass transport and access to the surface area, the combination of the molecular sieve structure and nitrogen functionalization provided, respectively, excellent CO2 adsorption capacities of up to 3.7 mmol g~(-1), and outstanding CO2-N2 selectivities of up to 14.4 from single component gas data. Nonetheless, the CO2-N2 selectivity in the Henry law regime-representative of post-combustion flue-gas streams-of some of our carbons was particularly remarkable (e.g. 96), comparable to or even higher than those described for most recent carbons, and only surpassed by those of certain zeolites.
机译：由间苯二酚，3-羟基吡啶和溴化四乙铵组成的深共熔溶剂（DES）用于合成分层的氮掺杂碳分子筛。 DES在合成过程中扮演着多种角色，作为确保试剂均质化的液体介质，负责实现分层结构的结构导向剂以及碳化后获得的固体吸附剂的碳和氮源。因此，合成提供了试剂的经济性，其强调了常规缩聚反应的绿色本质和低成本。有趣的是，虽然大孔促进了物质的运输和表面积的获取，但分子筛结构和氮官能化的结合分别提供了高达3.7 mmol g〜（-1）的出色CO2吸附容量和出色的CO2-N2选择性。从单组分气体数据中获取最多14.4。但是，在亨利法则制度中，燃烧后的烟气流代表了我们的一些碳的CO2-N2选择性特别引人注目（例如96），与最近的碳相比甚至更高。仅被某些沸石所超越。

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