纳米孔
煅烧
碳化
氢气储存
材料科学
化学工程
比表面积
碳纤维
金属有机骨架
多孔性
铬
氢
催化作用
氧化物
无机化学
纳米技术
吸附
化学
有机化学
复合数
复合材料
冶金
扫描电子显微镜
工程类
作者
Tshiamo Segakweng,Nicholas M. Musyoka,Jianwei Ren,Philip Crouse,Henrietta W. Langmi
标识
DOI:10.1007/s11164-015-2338-1
摘要
Nanoporous carbons which possess high surface areas and narrow pore size distributions have become one of the most important classes of porous materials with potential to be utilized for hydrogen storage. In recent times, several metal–organic frameworks (MOFs) have been shown to be promising precursors for creating nanoporous carbons due to their high surface areas and tunable pore sizes. The pore structure and surface area of the resultant carbon materials can be tuned simply by changing the calcination temperature. In this work, a zinc-based MOF (MOF-5) and a chromium-based MOF (Cr-MOF) were both used as precursors for syntheses of nanoporous carbons by the direct carbonization technique at different temperatures. The resultant carbon nanostructure from MOF-5 possessed higher surface area, higher pore volume and enhanced hydrogen storage capacity as compared to pristine MOF. Meanwhile, the derived carbons from Cr-MOF displayed lower surface areas, pore volumes and hydrogen uptake than the parent MOF due to the formation of chromium oxide and carbide species in the pores of the Cr-MOF-derived carbons.
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