Nanoporous spongy graphene: Potential applications for hydrogen adsorption and selective gas separation

Nikolaos Kostoglou; Georgios Constantinides; Georgia Charalambopoulou; Theodore Steriotis; Kyriaki Polychronopoulou; Yuanqing Li; Kin Liao; Vladislav Ryzhkov; Christian Mitterer; Claus Rebholz

doi:10.1016/j.tsf.2015.06.060

Nanoporous spongy graphene: Potential applications for hydrogen adsorption and selective gas separation

Nikolaos Kostoglou, Georgios Constantinides, Georgia Charalambopoulou, Theodore Steriotis, Kyriaki Polychronopoulou, Yuanqing Li, Kin Liao, Vladislav Ryzhkov, Christian Mitterer, Claus Rebholz

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24 Scopus citations

Abstract

In the present work, a nanoporous (pore width ~ 0.7 nm) graphene-based sponge-like material with large surface area (~ 350 m²/g) was synthesized by wet chemical reduction of graphene oxide in combination with freeze-drying. Surface morphology and elemental composition were studied by scanning and transmission electron microscopy combined with energy dispersive X-ray spectroscopy. Surface chemistry was qualitatively examined by Fourier-transform infrared spectroscopy, while the respective structure was investigated by X-ray diffraction analysis. Textural properties, including Brunauer-Emmet-Teller (BET) surface area, micropore volume and surface area as well as pore size distribution, were deduced from nitrogen gas adsorption/desorption data obtained at 77 K and up to 1 bar. Potential use of the spongy graphene for gas storage and separation applications was preliminarily assessed by low-pressure (0-1 bar) H₂, CO₂and CH₄sorption measurements at different temperatures (77, 273 and 298 K). The adsorption capacities for each gas were evaluated up to ~ 1 bar, the isosteric enthalpies of adsorption for CO₂(28-33 kJ/mol) and CH₄(30-38 kJ/mol) were calculated using the Clausius-Clapeyron equation, while the CO₂/CH₄gas selectivity (up to 95:1) was estimated using the Ideal Adsorbed Solution Theory (IAST).

Original language	British English
Pages (from-to)	242-249
Number of pages	8
Journal	Thin Solid Films
Volume	596
DOIs	https://doi.org/10.1016/j.tsf.2015.06.060
State	Published - 1 Dec 2015

Keywords

Freeze drying
Gas selectivity
Gas sorption
Graphene
Nanoporous sponge
Wet reduction

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10.1016/j.tsf.2015.06.060

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@article{de9410fb06cb4b2aa1bbe9ada82455a2,

title = "Nanoporous spongy graphene: Potential applications for hydrogen adsorption and selective gas separation",

abstract = "In the present work, a nanoporous (pore width ~ 0.7 nm) graphene-based sponge-like material with large surface area (~ 350 m2/g) was synthesized by wet chemical reduction of graphene oxide in combination with freeze-drying. Surface morphology and elemental composition were studied by scanning and transmission electron microscopy combined with energy dispersive X-ray spectroscopy. Surface chemistry was qualitatively examined by Fourier-transform infrared spectroscopy, while the respective structure was investigated by X-ray diffraction analysis. Textural properties, including Brunauer-Emmet-Teller (BET) surface area, micropore volume and surface area as well as pore size distribution, were deduced from nitrogen gas adsorption/desorption data obtained at 77 K and up to 1 bar. Potential use of the spongy graphene for gas storage and separation applications was preliminarily assessed by low-pressure (0-1 bar) H2, CO2and CH4sorption measurements at different temperatures (77, 273 and 298 K). The adsorption capacities for each gas were evaluated up to ~ 1 bar, the isosteric enthalpies of adsorption for CO2(28-33 kJ/mol) and CH4(30-38 kJ/mol) were calculated using the Clausius-Clapeyron equation, while the CO2/CH4gas selectivity (up to 95:1) was estimated using the Ideal Adsorbed Solution Theory (IAST).",

keywords = "Freeze drying, Gas selectivity, Gas sorption, Graphene, Nanoporous sponge, Wet reduction",

author = "Nikolaos Kostoglou and Georgios Constantinides and Georgia Charalambopoulou and Theodore Steriotis and Kyriaki Polychronopoulou and Yuanqing Li and Kin Liao and Vladislav Ryzhkov and Christian Mitterer and Claus Rebholz",

note = "Funding Information: This research was partially supported by EC FP7 -INFRASTRUCTURES project H2FC (GA No. 284522 ) and by Khalifa University Internal Research Fund ( KUIRF L1 2013/210014 and KUIRF 2014/210047 ). Publisher Copyright: {\textcopyright} 2015 Elsevier B.V. All rights reserved.",

year = "2015",

month = dec,

day = "1",

doi = "10.1016/j.tsf.2015.06.060",

language = "British English",

volume = "596",

pages = "242--249",

journal = "Thin Solid Films",

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TY - JOUR

T1 - Nanoporous spongy graphene

T2 - Potential applications for hydrogen adsorption and selective gas separation

AU - Kostoglou, Nikolaos

AU - Constantinides, Georgios

AU - Charalambopoulou, Georgia

AU - Steriotis, Theodore

AU - Polychronopoulou, Kyriaki

AU - Li, Yuanqing

AU - Liao, Kin

AU - Ryzhkov, Vladislav

AU - Mitterer, Christian

AU - Rebholz, Claus

N1 - Funding Information: This research was partially supported by EC FP7 -INFRASTRUCTURES project H2FC (GA No. 284522 ) and by Khalifa University Internal Research Fund ( KUIRF L1 2013/210014 and KUIRF 2014/210047 ). Publisher Copyright: © 2015 Elsevier B.V. All rights reserved.

PY - 2015/12/1

Y1 - 2015/12/1

N2 - In the present work, a nanoporous (pore width ~ 0.7 nm) graphene-based sponge-like material with large surface area (~ 350 m2/g) was synthesized by wet chemical reduction of graphene oxide in combination with freeze-drying. Surface morphology and elemental composition were studied by scanning and transmission electron microscopy combined with energy dispersive X-ray spectroscopy. Surface chemistry was qualitatively examined by Fourier-transform infrared spectroscopy, while the respective structure was investigated by X-ray diffraction analysis. Textural properties, including Brunauer-Emmet-Teller (BET) surface area, micropore volume and surface area as well as pore size distribution, were deduced from nitrogen gas adsorption/desorption data obtained at 77 K and up to 1 bar. Potential use of the spongy graphene for gas storage and separation applications was preliminarily assessed by low-pressure (0-1 bar) H2, CO2and CH4sorption measurements at different temperatures (77, 273 and 298 K). The adsorption capacities for each gas were evaluated up to ~ 1 bar, the isosteric enthalpies of adsorption for CO2(28-33 kJ/mol) and CH4(30-38 kJ/mol) were calculated using the Clausius-Clapeyron equation, while the CO2/CH4gas selectivity (up to 95:1) was estimated using the Ideal Adsorbed Solution Theory (IAST).

AB - In the present work, a nanoporous (pore width ~ 0.7 nm) graphene-based sponge-like material with large surface area (~ 350 m2/g) was synthesized by wet chemical reduction of graphene oxide in combination with freeze-drying. Surface morphology and elemental composition were studied by scanning and transmission electron microscopy combined with energy dispersive X-ray spectroscopy. Surface chemistry was qualitatively examined by Fourier-transform infrared spectroscopy, while the respective structure was investigated by X-ray diffraction analysis. Textural properties, including Brunauer-Emmet-Teller (BET) surface area, micropore volume and surface area as well as pore size distribution, were deduced from nitrogen gas adsorption/desorption data obtained at 77 K and up to 1 bar. Potential use of the spongy graphene for gas storage and separation applications was preliminarily assessed by low-pressure (0-1 bar) H2, CO2and CH4sorption measurements at different temperatures (77, 273 and 298 K). The adsorption capacities for each gas were evaluated up to ~ 1 bar, the isosteric enthalpies of adsorption for CO2(28-33 kJ/mol) and CH4(30-38 kJ/mol) were calculated using the Clausius-Clapeyron equation, while the CO2/CH4gas selectivity (up to 95:1) was estimated using the Ideal Adsorbed Solution Theory (IAST).

KW - Freeze drying

KW - Gas selectivity

KW - Gas sorption

KW - Graphene

KW - Nanoporous sponge

KW - Wet reduction

UR - http://www.scopus.com/inward/record.url?scp=84939560652&partnerID=8YFLogxK

U2 - 10.1016/j.tsf.2015.06.060

DO - 10.1016/j.tsf.2015.06.060

M3 - Article

AN - SCOPUS:84939560652

SN - 0040-6090

VL - 596

SP - 242

EP - 249

JO - Thin Solid Films

JF - Thin Solid Films

ER -

Nanoporous spongy graphene: Potential applications for hydrogen adsorption and selective gas separation

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Keywords

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