期刊
RSC ADVANCES
卷 9, 期 40, 页码 23241-23253出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ra03659h
关键词
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资金
- National Natural Science Foundation of China [51872110]
- Natural Science Foundation of Henan Province [172102210381]
- Natural Science Foundation of Education Department of Henan Province [18A150011, 19A150032]
Considering the characteristics of abundant narrow micropores of <1 nm, appropriate proportion of mesopores/macropores and suitable surface functionalization for a highly-efficient carbon-based CO2 adsorbent, we proposed a facile and cost-effective strategy to prepare N and S dual-doped carbons with well-interconnected hierarchical pores. Benefiting from the unique structural features, the resultant optimal material showed a prominent CO2 uptake of up to 7.76 and 5.19 mmol g(-1) at 273 and 298 K under 1 bar, and importantly, a superb CO2 uptake of 1.51 mmol g(-1) at 298 K and 0.15 bar was achieved, which was greatly significant for CO2 capture from the post-combustion flue gases in practical application. A systematic study demonstrated that the synergetic effect of ultramicroporosity and surface functionalization determined the CO2 capture properties of porous carbons, and the synergistic influence mechanism of nitrogen/sulfur dual-doping on CO2 capture performance was also investigated in detail. Importantly, such as-prepared carbon-based CO2 adsorbents also showed an outstanding recyclability and CO2/N-2 selectivity. In view of cost-effective fabrication, the excellent adsorption capacity, high selectivity and simple regeneration, our developed strategy was valid and convenient to design a novel and highly-efficient carbonaceous adsorbent for large-scale CO2 capture and separation from post-combustion flue gases.
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