Exceptional CO2 capture in a hierarchically porous carbon with simultaneous high surface area and pore volume
Exceptional CO2 capture in a hierarchically porous carbon with simultaneous high surface area and pore volume
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DOI：
10.1039/c3ee42918k
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发表时间：
2014
影响因子：
32.5
通讯作者：
Gadipelli Srinivas;V. Krungleviciute;Zheng-Xiao Guoa;T. Yildirim
中科院分区：
文献类型：
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作者：
Gadipelli Srinivas;V. Krungleviciute;Zheng-Xiao Guoa;T. Yildirim
一种新型的同时具有高表面积和高孔体积的分级多孔碳（HPC）结构已经从内部优化的金属有机框架（MOFs）的仔细控制的碳化合成。合成条件的变化导致高产率的毫米级M0 F-5晶体。随后的MOF碳化产生的HPC同时具有高达2734 m2 g−1的高表面积和高达5.53 cm 3 g−1的异常高的总孔体积。在HPC中，微孔大部分被保留，并且介孔和大孔由单个晶体中的缺陷产生，这通过从MOF前体的结构遗传而成为可能。所得HPC显示出显著量的CO2吸附，在30 bar和27 °C下超过27 mmol g−1（119 wt%），这是文献中报道的多孔碳的最高值之一。研究结果与文献进行了比较分析。研究结果表明，高容量碳基吸附剂的开发具有巨大的潜力，可用于有效的燃烧前CO2捕集和其他气体和能量储存应用。
A new type of hierarchically porous carbon (HPC) structures of simultaneously high surface area and high pore volume has been synthesised from carefully controlled carbonization of in-house optimised metal–organic frameworks (MOFs). Changes in synthesis conditions lead to millimetre-sized MOF-5 crystals in a high yield. Subsequent carbonization of the MOFs yield HPCs with simultaneously high surface area, up to 2734 m2 g−1, and exceptionally high total pore volume, up to 5.53 cm3 g−1. In the HPCs, micropores are mostly retained and meso- and macro- pores are generated from defects in the individual crystals, which is made possible by structural inheritance from the MOF precursor. The resulting HPCs show a significant amount of CO2 adsorption, over 27 mmol g−1 (119 wt%) at 30 bar and 27 °C, which is one of the highest values reported in the literature for porous carbons. The findings are comparatively analysed with the literature. The results show great potential for the development of high capacity carbon-based sorbents for effective pre-combustion CO2 capture and other gas and energy storage applications.