Synthesis of rGO/Zr-MOF composite for hydrogen storage application

A composite material consisting of Zr-based metal organic framework (Zr-MOF) and reduced graphene oxide (rGO) was successfully synthesized by an in situ method. The aim of the study was to transfer some of the graphene's attractive properties to the MOF materials. An important observation was t...

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Bibliographic Details
Published in:Journal of alloys and compounds 2017-11, Vol.724, p.450-455
Main Authors: Musyoka, Nicholas M., Ren, Jianwei, Langmi, Henrietta W., North, Brian C., Mathe, Mkhulu, Bessarabov, Dmitri
Format: Article
Language:English
Subjects:
Composite materials
Crystallization
Graphene
Graphite
Hydrogen
Hydrogen storage
Metals
Particulate composites
Reduced graphene oxide (rGO)
rGO/Zr-MOF composite
Storage capacity
Zirconium
Zr-MOF
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Summary:A composite material consisting of Zr-based metal organic framework (Zr-MOF) and reduced graphene oxide (rGO) was successfully synthesized by an in situ method. The aim of the study was to transfer some of the graphene's attractive properties to the MOF materials. An important observation was that the incorporation of rGO did not alter or interfere with the crystallization of the MOF material. The studies showed an increase in surface area for the rGO/Zr-MOF composite (1480 m2/g) when compared to that of pristine Zr-MOF (1116 m2/g). There was also an enhancement of the hydrogen storage capacity from 1.4 wt% to 1.8 wt% for the GO/Zr-MOF composite. This enhancement could be attributed to the synergistic contribution of interactions of rGO sheets with hydrogen as well as from the possible expansion of the pore space in the Zr-MOF induced by the presence of the graphene-like material. [Display omitted] •A rGO/Zr-MOF composite was successfully synthesized by an in situ method.•Incorporation of rGO did not alter nor interfere with the crystallization of Zr-MOF.•Enhanced surface area and hydrogen uptake for rGO/Zr-MOF composite was observed.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2017.07.040