Carbon-based building blocks for alcohol dehydration membranes with disorder-enhanced water permeability

Vittorio Boffa, H. Etmimi, P.E. Mallon, Haizheng Tao, Giuliana Magnacca, Yuanzheng Yue

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

11 Citationer (Scopus)

Resumé

Graphene oxide (GO) thin films have demonstrated outstanding water permeability and excellent selectivity towards organic molecules and inorganic salts, unlocking a new exciting direction in the development of nanofiltration, desalination and pervaporation membranes. However, there are still high concerns about their stability at basic pH and under cross-flow conditions. The stabilization of graphene oxide can be achieved by thermal or chemical reduction; but stacked layers of reduced GO tend to form ordered and compact graphite-like structures, thus preventing their application as molecular separation membranes. In this work, a humic acid-like biopolymer (HAL), extracted from organic compost with a yield of ~ 20%, was used to fabricate composite GO-HAL membranes. The HAL brings a high degree of disorder to the membrane structure, with the benefit of an increased water permeation rate. Upon thermal stabilization, the membrane with a biopolymer loading of 30% presented an ideal water/ethanol selectivity of 45 and a water permeance that is 33% higher than the pristine graphene oxide membrane. The enhanced water permeability along with the good water/ethanol selectivity makes the GO-HAL membranes promising devices for alcohol dehydration technologies.
OriginalsprogEngelsk
TidsskriftCarbon
Vol/bind118
Sider (fra-til)458-466
Antal sider9
ISSN0008-6223
DOI
StatusUdgivet - 2017

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Graphite
Dehydration
Graphene
Biopolymers
Alcohols
Carbon
Humic Substances
Membranes
Oxides
Water
Ethanol
Stabilization
Nanofiltration
Membrane structures
Pervaporation
Desalination
Permeation
Oxide films
Salts
Thin films

Citer dette

Boffa, Vittorio ; Etmimi, H. ; Mallon, P.E. ; Tao, Haizheng ; Magnacca, Giuliana ; Yue, Yuanzheng. / Carbon-based building blocks for alcohol dehydration membranes with disorder-enhanced water permeability. I: Carbon. 2017 ; Bind 118. s. 458-466.
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title = "Carbon-based building blocks for alcohol dehydration membranes with disorder-enhanced water permeability",
abstract = "Graphene oxide (GO) thin films have demonstrated outstanding water permeability and excellent selectivity towards organic molecules and inorganic salts, unlocking a new exciting direction in the development of nanofiltration, desalination and pervaporation membranes. However, there are still high concerns about their stability at basic pH and under cross-flow conditions. The stabilization of graphene oxide can be achieved by thermal or chemical reduction; but stacked layers of reduced GO tend to form ordered and compact graphite-like structures, thus preventing their application as molecular separation membranes. In this work, a humic acid-like biopolymer (HAL), extracted from organic compost with a yield of ~ 20{\%}, was used to fabricate composite GO-HAL membranes. The HAL brings a high degree of disorder to the membrane structure, with the benefit of an increased water permeation rate. Upon thermal stabilization, the membrane with a biopolymer loading of 30{\%} presented an ideal water/ethanol selectivity of 45 and a water permeance that is 33{\%} higher than the pristine graphene oxide membrane. The enhanced water permeability along with the good water/ethanol selectivity makes the GO-HAL membranes promising devices for alcohol dehydration technologies.",
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author = "Vittorio Boffa and H. Etmimi and P.E. Mallon and Haizheng Tao and Giuliana Magnacca and Yuanzheng Yue",
year = "2017",
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Carbon-based building blocks for alcohol dehydration membranes with disorder-enhanced water permeability. / Boffa, Vittorio; Etmimi, H.; Mallon, P.E.; Tao, Haizheng; Magnacca, Giuliana; Yue, Yuanzheng.

I: Carbon, Bind 118, 2017, s. 458-466.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Carbon-based building blocks for alcohol dehydration membranes with disorder-enhanced water permeability

AU - Boffa, Vittorio

AU - Etmimi, H.

AU - Mallon, P.E.

AU - Tao, Haizheng

AU - Magnacca, Giuliana

AU - Yue, Yuanzheng

PY - 2017

Y1 - 2017

N2 - Graphene oxide (GO) thin films have demonstrated outstanding water permeability and excellent selectivity towards organic molecules and inorganic salts, unlocking a new exciting direction in the development of nanofiltration, desalination and pervaporation membranes. However, there are still high concerns about their stability at basic pH and under cross-flow conditions. The stabilization of graphene oxide can be achieved by thermal or chemical reduction; but stacked layers of reduced GO tend to form ordered and compact graphite-like structures, thus preventing their application as molecular separation membranes. In this work, a humic acid-like biopolymer (HAL), extracted from organic compost with a yield of ~ 20%, was used to fabricate composite GO-HAL membranes. The HAL brings a high degree of disorder to the membrane structure, with the benefit of an increased water permeation rate. Upon thermal stabilization, the membrane with a biopolymer loading of 30% presented an ideal water/ethanol selectivity of 45 and a water permeance that is 33% higher than the pristine graphene oxide membrane. The enhanced water permeability along with the good water/ethanol selectivity makes the GO-HAL membranes promising devices for alcohol dehydration technologies.

AB - Graphene oxide (GO) thin films have demonstrated outstanding water permeability and excellent selectivity towards organic molecules and inorganic salts, unlocking a new exciting direction in the development of nanofiltration, desalination and pervaporation membranes. However, there are still high concerns about their stability at basic pH and under cross-flow conditions. The stabilization of graphene oxide can be achieved by thermal or chemical reduction; but stacked layers of reduced GO tend to form ordered and compact graphite-like structures, thus preventing their application as molecular separation membranes. In this work, a humic acid-like biopolymer (HAL), extracted from organic compost with a yield of ~ 20%, was used to fabricate composite GO-HAL membranes. The HAL brings a high degree of disorder to the membrane structure, with the benefit of an increased water permeation rate. Upon thermal stabilization, the membrane with a biopolymer loading of 30% presented an ideal water/ethanol selectivity of 45 and a water permeance that is 33% higher than the pristine graphene oxide membrane. The enhanced water permeability along with the good water/ethanol selectivity makes the GO-HAL membranes promising devices for alcohol dehydration technologies.

KW - graphene oxide

KW - humic substances

KW - pervaporation

KW - GO membranes

KW - alcohol dehydration

U2 - 10.1016/j.carbon.2017.03.077

DO - 10.1016/j.carbon.2017.03.077

M3 - Journal article

VL - 118

SP - 458

EP - 466

JO - Carbon

JF - Carbon

SN - 0008-6223

ER -