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|Title:||Remarkable Improvement in the Mechanical Properties and CO2 Uptake of MOFs Brought About by Covalent Linking to Graphene|
Rao, C. N. R.
Zeolitic Imidazolate Frameworks
|Publisher:||Wiley-V C H Verlag Gmbh|
|Citation:||Kumar, R.; Raut, D.; Ramamurty, U.; Rao, C. N. R., Remarkable Improvement in the Mechanical Properties and CO2 Uptake of MOFs Brought About by Covalent Linking to Graphene. Angewandte Chemie-International Edition 2016, 55 (27), 7857-7861 http://dx.doi.org/10.1002/anie.201603320|
Angewandte Chemie-International Edition
|Abstract:||Metal-organic frameworks (MOFs) are exceptional as gas adsorbents but their mechanical properties are poor. We present a successful strategy to improve the mechanical properties along with gas adsorption characteristics, wherein graphene (Gr) is covalently bonded with M/DOBDC (M=Mg2+, Ni2+, or Co2+, DOBDC=2,5-dioxido-1,4-benzene dicarboxylate) MOFs. The surface area of the graphene-MOF composites increases up to 200-300 m(2) g(-1) whereas the CO2 uptake increases by ca. 3-5 wt% at 0.15 atm and by 610 wt% at 1 atm. What is significant is that the composites exhibit improved mechanical properties. In the case of Mg/DOBDC, a three-fold increase in both the elastic modulus and hardness with 5 wt% graphene reinforcement is observed. Improvement in both the mechanical properties and gas adsorption characteristics of porous MOFs on linking them to graphene is a novel observation and suggests a new avenue for the design and synthesis of porous materials.|
|Appears in Collections:||Research Papers (Prof. C.N.R. Rao)|
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