Metal-organic frameworks MOFs carbons

IINS spectroscopy is an important tool for development of understanding of the interactions between the substrate and the adsorbate in hydrogen-storage materials. In addition to carbon nanotubes 17a,b,c), activated carbon 17d), and several other materials are being actively investigated. These include metal organic framework (MOF) compounds 18b,c), zeolites 18d), and metal phosphates 18e). 

Porous materials discussed at the International Conference on Materials for Advanced Technologies 2005 included clay minerals, silicates, aluminosilicates, organosilicas, metals, silicon, metal oxides, carbons and carbon nanotubes, polymers and coordination polymers, or metal-organic frameworks (MOFs), metal and metal oxide nanoparticles, thin films, membranes, and monoliths (Zhao, 2006). 

Figure 5.8 Schematic representations of (a) buckminsterfullerene (b) carbon nanofibres (c) single- and multi-walled carbon nanotubes (d) metal-organic framework, MOF-177.

Apart from zeolites and clays, other materials, such as metal-organic frameworks (MOFs), have also been explored as template to produce porous carbons. Recently, Liu et al. have synthesised porous carbon by heating the carbon precursor furfuryl alcohol within the pores of MOF-5. The resultant carbon exhibits high specific surface area up to 2872 m g and high pore volume of 2 cm g but possesses both micropores and mesopores. This porous carbon material shows good hydrogen uptake of 2.6 wt% at 760 Torr and —196 °C, as well as excellent electrochemical properties as an electrode material for an electrochemical double-layered capacitor. 

Liu, B., Shioyama, H., Jiang, H., Zhang, X., Xu, Q., 2010a. Metal-organic framework (MOF) as a template for syntheses of nanoporous carbons as electrode materials for supercapacitor. Carbon 48,456-463. 

DFT studies have been carried out to demonstrate the bonding of CO2 to Metal Organic Frameworks (MOF). A bridged coordination has been proposed by Hou et al. [22] in the interaction of CO2 with M-MOF-74 (M = Mg and Zn), which shows a high CO2 adsorption capacity. Metal ions are supposed to interact with the O atoms of CO2, whereas the carbon atom of CO2 gives strong interactions with the O atoms of the organic linkers of the MOF. 

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