Multilayer membranes of graphene oxide nanosheets on cellulose filter papers for high-flux water filtration and high proton conductivity.
5 affiliations
- 1Faculty of Materials Science and Technology, University of Science Ho Chi Minh City 700000 Vietnam [email protected] [email protected] [email protected].
- 2Vietnam National University Ho Chi Minh City 700000 Vietnam.
- 3Center for Innovative Materials and Architectures Ho Chi Minh City 700000 Vietnam.
- 4Center for Materials Innovation and Technology, College of Engineering and Computer Science, VinUniversity Gia Lam District Hanoi 100000 Vietnam.
- 5Multifunctional Materials Laboratory, University of Science Ho Chi Minh City 700000 Vietnam.
Abstract
Two-dimensional graphene oxide (GO) nanosheets have emerged as multifunctional units for synthesizing nanostructured membranes for water filtration and proton transport technologies. In this research, advanced GO synthesis were conducted to produce GO dispersions at appropriate concentrations for building primary and secondary layers on cellulose filter papers (Cel). The primary GO layer on the largely porous Cel was formed by vacuum filtration of a GO dispersion 240 ppm. Subsequently, a secondary GO layer was built using a GO dispersion 60 ppm, covering microscale cracks on the primary layer. The multilayer GO membrane on the Cel substrate was compressed and nanostructured for high water permeance (147-240 L m⁻² h⁻¹ bar⁻¹), efficient removal of organic dyes (96.7-99.9%), and good performance stability after 15 days in water. Desalination experiments using a Cel/GO/Cel sandwich membrane showed a decrease in NaCl concentration from 2.8% to 0.9% after 12 filtration cycles. Electrochemical impedance spectroscopy measurements were performed to calculate membrane resistances and proton conductivities at 100% RH and various temperatures, leading to the estimation of activation energies. The proton conductivity increased from 1.08-4.82 mS cm⁻¹ for Cel/Cel membranes to 17.59-44.83 mS cm⁻¹ for Cel/GO/Cel membranes at 25-45 °C. Nanochannels in the GO membranes had a d-spacing of 8.5 Å, a water layer, and hydrogen-bond networks for fast proton transport, leading to lower activation energy barrier and higher proton conductivity. The novel multilayer Cel/GO/Cel membrane provides the advantages of low cost, biodegradable substrate, and high performance for water purification and proton conduction.
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BibTeX
@article{le2026multilayer,
title = {{Multilayer membranes of graphene oxide nanosheets on cellulose filter papers for high-flux water filtration and high proton conductivity.}},
author = {Hon Nhien Le and Ngoc Quang Tran and Nang An Vu and Thi Bich Duyen Luu and Lam Nhu Pham and Thi Bang Tam Dao and Trung Do Nguyen and Chi Nhan Ha Thuc and Hieu Le Van},
journal = {RSC advances},
year = {2026},
month = oct,
doi = {10.1039/d6ra09284e},
url = {https://europepmc.org/article/MED/42899047},
note = {CC BY},
}
RIS
TY - JOUR
TI - Multilayer membranes of graphene oxide nanosheets on cellulose filter papers for high-flux water filtration and high proton conductivity.
AU - Hon Nhien Le
AU - Ngoc Quang Tran
AU - Nang An Vu
AU - Thi Bich Duyen Luu
AU - Lam Nhu Pham
AU - Thi Bang Tam Dao
AU - Trung Do Nguyen
AU - Chi Nhan Ha Thuc
AU - Hieu Le Van
PY - 2026
DA - 2026/10/19
JO - RSC advances
DO - 10.1039/d6ra09284e
UR - https://europepmc.org/article/MED/42899047
AB - Two-dimensional graphene oxide (GO) nanosheets have emerged as multifunctional units for synthesizing nanostructured membranes for water filtration and proton transport technologies. In this research, advanced GO synthesis were conducted to produce GO dispersions at appropriate concentrations for building primary and secondary layers on cellulose filter papers (Cel). The primary GO layer on the largely porous Cel was formed by vacuum filtration of a GO dispersion 240 ppm. Subsequently, a secondary GO layer was built using a GO dispersion 60 ppm, covering microscale cracks on the primary layer. The multilayer GO membrane on the Cel substrate was compressed and nanostructured for high water permeance (147-240 L m⁻² h⁻¹ bar⁻¹), efficient removal of organic dyes (96.7-99.9%), and good performance stability after 15 days in water. Desalination experiments using a Cel/GO/Cel sandwich membrane showed a decrease in NaCl concentration from 2.8% to 0.9% after 12 filtration cycles. Electrochemical impedance spectroscopy measurements were performed to calculate membrane resistances and proton conductivities at 100% RH and various temperatures, leading to the estimation of activation energies. The proton conductivity increased from 1.08-4.82 mS cm⁻¹ for Cel/Cel membranes to 17.59-44.83 mS cm⁻¹ for Cel/GO/Cel membranes at 25-45 °C. Nanochannels in the GO membranes had a d-spacing of 8.5 Å, a water layer, and hydrogen-bond networks for fast proton transport, leading to lower activation energy barrier and higher proton conductivity. The novel multilayer Cel/GO/Cel membrane provides the advantages of low cost, biodegradable substrate, and high performance for water purification and proton conduction.
SN - 2046-2069
ER -