Microporous and Mesoporous Materials
Microporous and Mesoporous Materials
5 years ago

Nanocomposites formed by in situ growth of NiDOBDC nanoparticles on graphene oxide sheets for enhanced CO2 and H2 storage

Nanocomposites formed by in situ growth of NiDOBDC nanoparticles on graphene oxide sheets for enhanced CO2 and H2 storage
A hybrid composite containing NiDOBDC [Ni-MOF-74 or Ni2(dobdc)] and graphene oxide (GO) was successfully synthesized using a facile method for enhanced CO2 and H2 storage. Additional porous spaces were created when the nanocomposite material with a three-dimensional (3-D) architecture was constructed with two-dimensional (2-D) graphene oxide sheets and microporous NiDOBDC nanoparticles. The analysis of gas storage performance reveals that the generation of new porosity resulted in enhanced CO2 and H2 adsorption. In particular, the NiDOBDC/GO composite with 10 wt% GO loading exhibited the highest CO2 and H2 storage values, up to 10.5 mmol/g (298 K, 20 bar) and 1.39 mmol/g (298 K, 20 bar), respectively, values that are significantly higher than those of the Ni-DOBDC metal–organic framework. Besides, enhanced CO2/N2 selectivity was also observed for NiDOBDC/GO composite due to the additional storage sites for CO2. The strategy demonstrated in this work can also be applied to other microporous materials to enhance their gas adsorption properties.

Publisher URL: www.sciencedirect.com/science

DOI: S138718111830057X

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