Gas separation performance of ultra-permeable graphene oxide membranes supported by single-wall carbon nanotubes: Unveiling the effect of fabrication method, gas flow transport type, and material aging

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43931845" target="_blank" >RIV/60461373:22310/25:43931845 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22340/25:43931845 RIV/00216208:11320/25:10506425 RIV/00216275:25530/25:39924131

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0376738825004697?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0376738825004697?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.memsci.2025.124156" target="_blank" >10.1016/j.memsci.2025.124156</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Gas separation performance of ultra-permeable graphene oxide membranes supported by single-wall carbon nanotubes: Unveiling the effect of fabrication method, gas flow transport type, and material aging

Popis výsledku v původním jazyce

This study comprehensively investigated the impact of the preparation method on the resulting material properties of self-standing graphene oxide (GO) membranes and GO membranes deposited on a single-walled carbon nanotube (SWCNT) support layer, which was carried out using SEM, XRD, XPS, Raman and FTIR spectroscopy, 3D profilometry, thermal analysis and physisorption characterisation. The analysis of the gas permeability and separation properties of the membranes (including the effect of ageing) performed by repeated time-lag measurements of individual gases revealed a gradually increasing permeability and ideal selectivity, probably due to the release of residual water from the mother liquor. Samples prepared by the evaporation or vacuum filtration method exhibited a relatively short lifetime (up to 100 h), high H2 permeability (up to 12,000 Barrers), and ideal H2/CO2 selectivity from 2 to 3. In contrast, membranes prepared by the pressure filtration method showed durable character for almost 800 days while showing huge and increasing permeability exceeding 100,000 Barrers and, at the same time, remarkable selectivity for H2/CO2 (more than 4) and H2/CH4 (around 2) gas vapors, over the 2008 Robeson upper bound limit. The transport analysis performed via the Binary Friction Model revealed the predominant type of gas transport as Darcy flow rather than Knudsen type. Our work demonstrates the potential of GO-SWCNT membrane materials for developing new advanced separation membranes for future efficient gas, vapor, or liquid separation technologies.

Název v anglickém jazyce

Gas separation performance of ultra-permeable graphene oxide membranes supported by single-wall carbon nanotubes: Unveiling the effect of fabrication method, gas flow transport type, and material aging

Popis výsledku anglicky

This study comprehensively investigated the impact of the preparation method on the resulting material properties of self-standing graphene oxide (GO) membranes and GO membranes deposited on a single-walled carbon nanotube (SWCNT) support layer, which was carried out using SEM, XRD, XPS, Raman and FTIR spectroscopy, 3D profilometry, thermal analysis and physisorption characterisation. The analysis of the gas permeability and separation properties of the membranes (including the effect of ageing) performed by repeated time-lag measurements of individual gases revealed a gradually increasing permeability and ideal selectivity, probably due to the release of residual water from the mother liquor. Samples prepared by the evaporation or vacuum filtration method exhibited a relatively short lifetime (up to 100 h), high H2 permeability (up to 12,000 Barrers), and ideal H2/CO2 selectivity from 2 to 3. In contrast, membranes prepared by the pressure filtration method showed durable character for almost 800 days while showing huge and increasing permeability exceeding 100,000 Barrers and, at the same time, remarkable selectivity for H2/CO2 (more than 4) and H2/CH4 (around 2) gas vapors, over the 2008 Robeson upper bound limit. The transport analysis performed via the Binary Friction Model revealed the predominant type of gas transport as Darcy flow rather than Knudsen type. Our work demonstrates the potential of GO-SWCNT membrane materials for developing new advanced separation membranes for future efficient gas, vapor, or liquid separation technologies.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10400 - Chemical sciences

Projekt

<a href="/cs/project/GA19-14547S" target="_blank" >GA19-14547S: Nové kompozitní membrány pro cílené separace plynů a par (CoMeTS)</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

JOURNAL OF MEMBRANE SCIENCE

ISSN

0376-7388

e-ISSN

1873-3123

Svazek periodika

729

Číslo periodika v rámci svazku

June 2025

Stát vydavatele periodika

BE - Belgické království

Počet stran výsledku

12

Strana od-do

124156

Kód UT WoS článku

001486239200001

EID výsledku v databázi Scopus

2-s2.0-105003955789