Abstract
Graphene-based laminar membranes open new avenues for water treatment; in particular, reduced graphene oxide (rGO) membranes with high stability in aqueous solutions are gaining increased attention for desalination. However, the low water permeability of these membranes significantly limits their applications. In this study, the water permeability of thermally reduced GO membrane was increased by a factor of 26 times by creating in-plane nanopores with an average diameter of ∼3 nm and a high density of 2.89 × 1015 m-2 via H2O2 oxidation. These in-plane nanopores provide additional transport channels and shorten the transport distance for water molecules. Meanwhile, salt rejection of this membrane is dominated by both the Donnan effect and the size exclusion of the interspaces. Besides, the water permeability and salt rejection of the thermally reduced nanoporous GO membrane can also be simply tuned by adjusting the thermal treatment time and membrane thickness. Additionally, the fabricated membrane exhibited a relatively stable rejection of Na2SO4 during the long-term testing. This work demonstrates a novel and effective strategy for fabricating high-performance laminar rGO membranes for desalination applications.
| Original language | English |
|---|---|
| Pages (from-to) | 8314-8323 |
| Number of pages | 10 |
| Journal | Environmental Science and Technology |
| Volume | 53 |
| Issue number | 14 |
| DOIs | |
| Publication status | Published - 18 Jul 2019 |
Cite this
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Thermally reduced nanoporous graphene oxide membrane for desalination. / Li, Yang; Zhao, Wang; Weyland, Matthew; Yuan, Shi; Xia, Yun; Liu, Huiyuan; Jian, Meipeng; Yang, Jindi; Easton, Christopher D.; Selomulya, Cordelia; Zhang, Xiwang.
In: Environmental Science and Technology, Vol. 53, No. 14, 18.07.2019, p. 8314-8323.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Thermally reduced nanoporous graphene oxide membrane for desalination
AU - Li, Yang
AU - Zhao, Wang
AU - Weyland, Matthew
AU - Yuan, Shi
AU - Xia, Yun
AU - Liu, Huiyuan
AU - Jian, Meipeng
AU - Yang, Jindi
AU - Easton, Christopher D.
AU - Selomulya, Cordelia
AU - Zhang, Xiwang
PY - 2019/7/18
Y1 - 2019/7/18
N2 - Graphene-based laminar membranes open new avenues for water treatment; in particular, reduced graphene oxide (rGO) membranes with high stability in aqueous solutions are gaining increased attention for desalination. However, the low water permeability of these membranes significantly limits their applications. In this study, the water permeability of thermally reduced GO membrane was increased by a factor of 26 times by creating in-plane nanopores with an average diameter of ∼3 nm and a high density of 2.89 × 1015 m-2 via H2O2 oxidation. These in-plane nanopores provide additional transport channels and shorten the transport distance for water molecules. Meanwhile, salt rejection of this membrane is dominated by both the Donnan effect and the size exclusion of the interspaces. Besides, the water permeability and salt rejection of the thermally reduced nanoporous GO membrane can also be simply tuned by adjusting the thermal treatment time and membrane thickness. Additionally, the fabricated membrane exhibited a relatively stable rejection of Na2SO4 during the long-term testing. This work demonstrates a novel and effective strategy for fabricating high-performance laminar rGO membranes for desalination applications.
AB - Graphene-based laminar membranes open new avenues for water treatment; in particular, reduced graphene oxide (rGO) membranes with high stability in aqueous solutions are gaining increased attention for desalination. However, the low water permeability of these membranes significantly limits their applications. In this study, the water permeability of thermally reduced GO membrane was increased by a factor of 26 times by creating in-plane nanopores with an average diameter of ∼3 nm and a high density of 2.89 × 1015 m-2 via H2O2 oxidation. These in-plane nanopores provide additional transport channels and shorten the transport distance for water molecules. Meanwhile, salt rejection of this membrane is dominated by both the Donnan effect and the size exclusion of the interspaces. Besides, the water permeability and salt rejection of the thermally reduced nanoporous GO membrane can also be simply tuned by adjusting the thermal treatment time and membrane thickness. Additionally, the fabricated membrane exhibited a relatively stable rejection of Na2SO4 during the long-term testing. This work demonstrates a novel and effective strategy for fabricating high-performance laminar rGO membranes for desalination applications.
UR - http://www.scopus.com/inward/record.url?scp=85069949670&partnerID=8YFLogxK
U2 - 10.1021/acs.est.9b01914
DO - 10.1021/acs.est.9b01914
M3 - Article
VL - 53
SP - 8314
EP - 8323
JO - Environmental Science and Technology
JF - Environmental Science and Technology
SN - 0013-936X
IS - 14
ER -