Thin, High-Flux, Self-Standing, Graphene Oxide Membranes for Efficient Hydrogen Separation from Gas Mixtures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F17%3A43913387" target="_blank" >RIV/60461373:22310/17:43913387 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22340/17:43913387

Výsledek na webu

<a href="http://onlinelibrary.wiley.com/doi/10.1002/chem.201702233/full" target="_blank" >http://onlinelibrary.wiley.com/doi/10.1002/chem.201702233/full</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/chem.201702233" target="_blank" >10.1002/chem.201702233</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thin, High-Flux, Self-Standing, Graphene Oxide Membranes for Efficient Hydrogen Separation from Gas Mixtures

Popis výsledku v původním jazyce

The preparation and gas-separation performance of self-standing, high-flux, graphene oxide (GO) membranes is reported. Defect-free, 15-20 mm thick, mechanically stable, unsupported GO membranes exhibited outstanding gas-separation performance towards H-2/CO2 that far exceeded the corresponding 2008 Robeson upper bound. Remarkable separation efficiency of GO membranes for H-2 and bulky C-3 or C-4 hydrocarbons was achieved with high flux and good selectivity at the same time. On the contrary, N-2 and CH4 molecules, with larger kinetic diameter and simultaneously lower molecular weight, relative to that of CO2, remained far from the corresponding H-2/N-2 or H-2/CH4 upper bounds. Pore size distribution analysis revealed that the most abundant pores in GO material were those with an effective pore diameter of 4 nm; therefore, gas transport is not exclusively governed by size sieving and/or Knudsen diffusion, but in the case of CO2 was supplemented by specific interactions through 1) hydrogen bonding with carboxyl or hydroxyl functional groups and 2) the quadrupole moment. The self-standing GO membranes presented herein demonstrate a promising route towards the large-scale fabrication of high-flux, hydrogen-selective gas membranes intended for the separation of H-2/CO2 or H-2/alkanes.

Název v anglickém jazyce

Thin, High-Flux, Self-Standing, Graphene Oxide Membranes for Efficient Hydrogen Separation from Gas Mixtures

Popis výsledku anglicky

The preparation and gas-separation performance of self-standing, high-flux, graphene oxide (GO) membranes is reported. Defect-free, 15-20 mm thick, mechanically stable, unsupported GO membranes exhibited outstanding gas-separation performance towards H-2/CO2 that far exceeded the corresponding 2008 Robeson upper bound. Remarkable separation efficiency of GO membranes for H-2 and bulky C-3 or C-4 hydrocarbons was achieved with high flux and good selectivity at the same time. On the contrary, N-2 and CH4 molecules, with larger kinetic diameter and simultaneously lower molecular weight, relative to that of CO2, remained far from the corresponding H-2/N-2 or H-2/CH4 upper bounds. Pore size distribution analysis revealed that the most abundant pores in GO material were those with an effective pore diameter of 4 nm; therefore, gas transport is not exclusively governed by size sieving and/or Knudsen diffusion, but in the case of CO2 was supplemented by specific interactions through 1) hydrogen bonding with carboxyl or hydroxyl functional groups and 2) the quadrupole moment. The self-standing GO membranes presented herein demonstrate a promising route towards the large-scale fabrication of high-flux, hydrogen-selective gas membranes intended for the separation of H-2/CO2 or H-2/alkanes.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Chemistry A European Journal

ISSN

0947-6539

e-ISSN

—

Svazek periodika

23

Číslo periodika v rámci svazku

47

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

7

Strana od-do

11416-11422

Kód UT WoS článku

000408079900031

EID výsledku v databázi Scopus

2-s2.0-85026555488