Incorporation of UiO-66 into graphene foam for hydrogen storage applications

Sonwabo E. Bambalaza; Henrietta W. Langmi; Nicholas M. Musyoka; Jianwei Ren; Lindiwe E. Khotseng

doi:10.1016/j.matpr.2017.12.323

Incorporation of UiO-66 into graphene foam for hydrogen storage applications

Sonwabo E. Bambalaza, Henrietta W. Langmi, Nicholas M. Musyoka, Jianwei Ren, Lindiwe E. Khotseng

Research output: Journal Publication › Conference article › peer-review

5 Citations (Scopus)

Abstract

The fabrication of application-specific metal-organic framework (MOF) composites has the potential to shift more towards hydrogen storage system integration. The in-situ growth of nano particles on a graphene surface is a common technique for synthesizing graphene-inorganic nanocomposites and in this study, a graphene foam (GF) / zirconium-based MOF (UiO-66) composite was prepared using a two-step solvothermal method. Brunauer, Emmett and Teller (BET) surface area as well as hydrogen uptake capacity were measured under cryogenic conditions and compared to the values for pristine UiO-66. The GF/UiO-66 composite had a BET surface area of 1073 m²·g^-1 and a hydrogen uptake capacity of 1.1 wt% at 77 K and 1.2 bar pressure, compared to 1367 m²·g^-1 and 1.5 wt%, respectively for pristine UiO-66 under the same conditions. Besides the values being compromised relative to pristine UiO-66, the two-step in-situ synthesis approach yielded a composite with enhanced BET surface area and H₂ uptake relative to a composite obtained from a single step synthesis approach. The composites further exhibited better thermal stability than the pristine UiO-66 and show promise for the development of powdered MOF materials towards hydrogen storage system integration.

Original language	English
Pages (from-to)	10431-10439
Number of pages	9
Journal	Materials Today: Proceedings
Volume	5
Issue number	4
DOIs	https://doi.org/10.1016/j.matpr.2017.12.323
Publication status	Published - 2018
Externally published	Yes
Event	1st Africa Energy Materials Conference, AEMC 2017 - Pretoria, South Africa Duration: 28 Mar 2017 → 31 Mar 2017

Keywords

Graphene foam
Hydrogen uptake
UiO-66
Zr-MOF

ASJC Scopus subject areas

General Materials Science

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10.1016/j.matpr.2017.12.323

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title = "Incorporation of UiO-66 into graphene foam for hydrogen storage applications",

abstract = "The fabrication of application-specific metal-organic framework (MOF) composites has the potential to shift more towards hydrogen storage system integration. The in-situ growth of nano particles on a graphene surface is a common technique for synthesizing graphene-inorganic nanocomposites and in this study, a graphene foam (GF) / zirconium-based MOF (UiO-66) composite was prepared using a two-step solvothermal method. Brunauer, Emmett and Teller (BET) surface area as well as hydrogen uptake capacity were measured under cryogenic conditions and compared to the values for pristine UiO-66. The GF/UiO-66 composite had a BET surface area of 1073 m2·g-1 and a hydrogen uptake capacity of 1.1 wt% at 77 K and 1.2 bar pressure, compared to 1367 m2·g-1 and 1.5 wt%, respectively for pristine UiO-66 under the same conditions. Besides the values being compromised relative to pristine UiO-66, the two-step in-situ synthesis approach yielded a composite with enhanced BET surface area and H2 uptake relative to a composite obtained from a single step synthesis approach. The composites further exhibited better thermal stability than the pristine UiO-66 and show promise for the development of powdered MOF materials towards hydrogen storage system integration.",

keywords = "Graphene foam, Hydrogen uptake, UiO-66, Zr-MOF",

author = "Bambalaza, {Sonwabo E.} and Langmi, {Henrietta W.} and Musyoka, {Nicholas M.} and Jianwei Ren and Khotseng, {Lindiwe E.}",

note = "Publisher Copyright: {\textcopyright} 2017 The Author(s). Published by Elsevier Ltd.; 1st Africa Energy Materials Conference, AEMC 2017 ; Conference date: 28-03-2017 Through 31-03-2017",

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AU - Bambalaza, Sonwabo E.

AU - Langmi, Henrietta W.

AU - Musyoka, Nicholas M.

AU - Ren, Jianwei

AU - Khotseng, Lindiwe E.

PY - 2018

Y1 - 2018

N2 - The fabrication of application-specific metal-organic framework (MOF) composites has the potential to shift more towards hydrogen storage system integration. The in-situ growth of nano particles on a graphene surface is a common technique for synthesizing graphene-inorganic nanocomposites and in this study, a graphene foam (GF) / zirconium-based MOF (UiO-66) composite was prepared using a two-step solvothermal method. Brunauer, Emmett and Teller (BET) surface area as well as hydrogen uptake capacity were measured under cryogenic conditions and compared to the values for pristine UiO-66. The GF/UiO-66 composite had a BET surface area of 1073 m2·g-1 and a hydrogen uptake capacity of 1.1 wt% at 77 K and 1.2 bar pressure, compared to 1367 m2·g-1 and 1.5 wt%, respectively for pristine UiO-66 under the same conditions. Besides the values being compromised relative to pristine UiO-66, the two-step in-situ synthesis approach yielded a composite with enhanced BET surface area and H2 uptake relative to a composite obtained from a single step synthesis approach. The composites further exhibited better thermal stability than the pristine UiO-66 and show promise for the development of powdered MOF materials towards hydrogen storage system integration.

AB - The fabrication of application-specific metal-organic framework (MOF) composites has the potential to shift more towards hydrogen storage system integration. The in-situ growth of nano particles on a graphene surface is a common technique for synthesizing graphene-inorganic nanocomposites and in this study, a graphene foam (GF) / zirconium-based MOF (UiO-66) composite was prepared using a two-step solvothermal method. Brunauer, Emmett and Teller (BET) surface area as well as hydrogen uptake capacity were measured under cryogenic conditions and compared to the values for pristine UiO-66. The GF/UiO-66 composite had a BET surface area of 1073 m2·g-1 and a hydrogen uptake capacity of 1.1 wt% at 77 K and 1.2 bar pressure, compared to 1367 m2·g-1 and 1.5 wt%, respectively for pristine UiO-66 under the same conditions. Besides the values being compromised relative to pristine UiO-66, the two-step in-situ synthesis approach yielded a composite with enhanced BET surface area and H2 uptake relative to a composite obtained from a single step synthesis approach. The composites further exhibited better thermal stability than the pristine UiO-66 and show promise for the development of powdered MOF materials towards hydrogen storage system integration.

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KW - Zr-MOF

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ER -

Incorporation of UiO-66 into graphene foam for hydrogen storage applications

Abstract

Keywords

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