N-rich porous carbon with high CO2 capture capacity derived from polyamine-incorporated metal-organic framework materials

被引:24
作者
Wang, Junwen [1 ,2 ]
Lin, Yichao [2 ]
Yue, Qunfeng [1 ]
Tao, Kai [2 ]
Kong, Chunlong [2 ]
Chen, Liang [2 ]
机构
[1] Harbin Normal Univ, Coll Chem & Chem Engn, Harbin, Peoples R China
[2] Ningbo Inst Mat Technol & Engn, Inst New Energy Technol, Ningbo, Zhejiang, Peoples R China
来源
RSC ADVANCES | 2016年 / 6卷 / 58期
关键词
HYDROGEN STORAGE CAPACITY; NITROGEN; DIOXIDE; SEPARATION; CARBONIZATION; SORBENTS; MONOXIDE; CO2/CH4;
D O I
10.1039/c6ra09472d
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
N-doped porous carbon has a wide range of applications in many fields, such as gas adsorption and super-capacitor, which has stimulated active research for developing efficient strategies to fabricate N-rich porous carbon. In the present study, a series of N-rich porous carbons are derived from polyamine-incorporated metal-organic framework materials (MOFs). Results show that the N content of as-prepared porous carbon is greatly increased by loading polyethyleneimine (PEI) into ZIF-70 frameworks because the loaded PEI can adsorb onto the pore walls of the ZIF-70 and simultaneously supply carbon and N sources during the carbonization process. As a result, the surface area of the as-prepared sample is also increased. In addition, the N content of the porous carbon can be tuned by PEI loadings and carbonization temperature. The as-prepared N-rich porous carbons exhibit greatly enhanced CO2-selective adsorption capacity compared to ZIF-70 and porous carbon derived from ZIF-70. Here the CO2 capture capacity of the as-prepared N-rich porous increases with increasing N content due to considerable interaction affinity between doped N and CO2 molecules. Thus, the as-prepared porous carbon with N content of 11.08 wt% displays high CO2 uptake of 4.86 mmol g(-1) at 0 degrees C and 1 bar, albeit it has a moderate surface area of 652 m(2) g(-1). Moreover, the N-rich porous carbon clearly shows an excellent separation performance for CO2-over-N-2 and CO2-over-CH4. Overall, polyamine-incorporated MOFs are an efficient strategy for controllable fabrication of N-rich porous carbon. The resulting products display a high CO2-selective capture performance. It should be noted that, to achieve the optimal CO2 capture ability, a comprehensive optimization of the polyamine-MOFs-derived porous carbon should be performed.
引用
收藏
页码:53017 / 53024
页数:8
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