mwcnt@mil53 (cr) nanoporous composite: synthesis, characterization, and methane storage property

In this paper, porous metal−organic frameworks (mil-53 [criii (oh).{o2c-c6h4-co2}.{ho2c-c6h4-co2h}x]) were hydrothermally synthesized and, then, a hybrid composite of these synthesized porous metal−organic frameworks (mof) with acid-treated multi-walled carbon nanotubes (mwcnts) was prepared. the materials were characterized by x-ray diffraction (xrd), scanning electron microscopy (sem), brunauer–emmet–teller (bet), and ft-ir analysis. the x-ray diffraction patterns showed that the structure of mwcnt@mil-53-cr nonoporous composite was not disturbed by incorporation of mwcnt in mil-53-cr. n2 adsorption – desorption analysis showed that the mil-53-cr and mwcnt@mil-53-cr nanoporous composite had bet surface areas of 1500m^2.g^-1 and 1347m^2.g^-1, respectively. these materials were developed as adsorbents for methane storage at room temperature. the analysis showed about 50% increase in methane storage capacity (from 7.1 to 10.8 mmol.g^-1 at 298k and 35bar) for mwcnt@mil-53-cr composite. the increment in the ch4 adsorption capacity of mwcnt@mil-53-cr nanoporous composite is attributed to the increase in micropore volume of mil-53-cr by mwcnt incorporation.