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Membranes
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Graphene-Based Membranes: From Synthesis to Applications
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Graphene-Based Membranes: From Synthesis to Applications

A special issue of Membranes (ISSN 2077-0375). This special issue belongs to the section "Membrane Applications".

Deadline for manuscript submissions: closed (31 January 2023) | Viewed by 5527

Special Issue Editors

Dr. Jeng Yi Chong

E-Mail Website
Guest Editor
Singapore Membrane Technology Centre NTU, Singapore 639798, Singapore
Interests: inorganic membranes; hollow fiber membranes; nanoporous materials; nanofiltration; membrane distillation; solvent separation
Dr. Chong Yang Chuah

E-Mail Website
Guest Editor
Chemical Engineering Department, Universiti Teknologi Petronas, Bandar Seri Iskandar, Perak 32610, Malaysia
Interests: gas separation; nanoporous materials; mixed-matrix membranes
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Graphene-based materials such as graphene, graphene oxide (GO) and reduced GO (rGO) have demonstrated great potential for thin film and membrane applications due to their unique two-dimensional structure, atomic-layer thickness and tuneable functionalities. With excellent chemical and mechanical properties, graphene-based membranes have been applied for gas separation, nanofiltration, organic solvent nanofiltration, pervaporation and so on. As our understanding of the material processing and transport mechanisms have developed throughout the last decade, the separation performance of graphene-based membranes can now be uniquely designed and finetuned by tailoring their structures and properties.

This Special Issue aims to publish recent advances in graphene-based membrane research. We wish to share new strategies and techniques for designing and synthesizing graphene-based membranes for novel applications. Studies about the development of large scale graphene-based membranes for potential pilot scale or industrial settings are also welcome. Interested authors are encouraged to submit their latest research findings, perspectives and review papers on the topics listed above.

Dr. Jeng Yi Chong
Dr. Chong Yang Chuah
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Membranes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • graphene-based membranes
  • graphene oxide
  • reduced graphene oxide
  • membrane separation
  • membrane fabrication
  • modeling and simulations

Published Papers (3 papers)

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Research

18 pages, 5705 KiB  
Article
Graphene-Oxide-Grafted Natural Phosphate Support as a Low-Cost Ceramic Membrane for the Removal of Anionic Dyes from Simulated Textile Effluent
by Hiba Bensalah, Ghizlane Derouich, Xifan Wang, Saad Alami Younssi and Maged F. Bekheet
Membranes 2023, 13(3), 345; https://doi.org/10.3390/membranes13030345 - 17 Mar 2023
Cited by 1 | Viewed by 1510
Abstract
A novel natural phosphate/graphene oxide (GO) composite membrane was successfully fabricated using two steps: (i) silane chemical grafting and (ii) dip-coating of a GO solution. First, the low-cost disk ceramic support used in this work was fabricated out of Moroccan natural phosphate, and [...] Read more.
A novel natural phosphate/graphene oxide (GO) composite membrane was successfully fabricated using two steps: (i) silane chemical grafting and (ii) dip-coating of a GO solution. First, the low-cost disk ceramic support used in this work was fabricated out of Moroccan natural phosphate, and its properties were thoroughly characterized. The optimized ceramic support was sintered at 1100 °C following a specific heat treatment based on thermogravimetric analysis (TGA) and differential thermal analysis (DTA); it exhibited a permeability of 953.33 L/h·m2·bar, a porosity of 24.55%, an average pore size of 2.45 μm and a flexural strength of 22.46 MPa. The morphology analysis using SEM showed that the GO layer was homogenously coated on the crack-free Moroccan phosphate support with a thickness of 2.8 μm. The Fourier transform infrared spectrometer (FT-IR) results showed that modification with silane could improve the interfacial adhesion between the GO membrane and the ceramic support. After coating with GO on the surface, the water permeability was reduced to 31.93 L/h·m2·bar (i.e., by a factor of 142). The prepared GO/ceramic composite membrane exhibited good efficiency in the rejection of a toxic azo dye Congo Red (CR) (95.2%) and for a simulated dye effluent (87.6%) under industrial conditions. The multi-cycle filtration tests showed that the rejection rate of CR dye remained almost the same for four cycles. Finally, the flux recovery was also studied. After 1 h of water cleaning, the permeate flux recovered, increased significantly, and then remained stable. Full article
(This article belongs to the Special Issue Graphene-Based Membranes: From Synthesis to Applications)
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11 pages, 2849 KiB  
Article
Ultrathin Graphene Oxide-Based Nanocomposite Membranes for Water Purification
by Faheeda Soomro, Fida Hussain Memon, Muhammad Ali Khan, Muzaffar Iqbal, Aliya Ibrar, Ayaz Ali Memon, Jong Hwan Lim, Kyung Hyon Choi and Khalid Hussain Thebo
Membranes 2023, 13(1), 64; https://doi.org/10.3390/membranes13010064 - 04 Jan 2023
Cited by 12 | Viewed by 2229
Abstract
Two-dimensional graphene oxide (GO)-based lamellar membranes have been widely developed for desalination, water purification, gas separation, and pervaporation. However, membranes with a well-organized multilayer structure and controlled pore size remain a challenge. Herein, an easy and efficient method is used to fabricate MoO [...] Read more.
Two-dimensional graphene oxide (GO)-based lamellar membranes have been widely developed for desalination, water purification, gas separation, and pervaporation. However, membranes with a well-organized multilayer structure and controlled pore size remain a challenge. Herein, an easy and efficient method is used to fabricate MoO2@GO and WO3@GO nanocomposite membranes with controlled structure and interlayer spacing. Such membranes show good separation for salt and heavy metal ions due to the intensive stacking interaction and electrostatic attraction. The as-prepared composite membranes showed high rejection rates (˃70%) toward small metal ions such as sodium (Na+) and magnesium (Mg2+) ions. In addition, both membranes also showed high rejection rates ˃99% for nickel (Ni2+) and lead (Pb2+) ions with good water permeability of 275 ± 10 L m−2 h−1 bar−1. We believe that our fabricated membranes will have a bright future in next generation desalination and water purification membranes. Full article
(This article belongs to the Special Issue Graphene-Based Membranes: From Synthesis to Applications)
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12 pages, 1955 KiB  
Article
Design of Multi-Layer Graphene Membrane with Descending Pore Size for 100% Water Desalination by Simulation Using ReaxFF
by Qusai Ibrahim, Rokhsareh Akbarzadeh, Salem S. Gharbia and Patrick Gathura Ndungu
Membranes 2022, 12(11), 1038; https://doi.org/10.3390/membranes12111038 - 25 Oct 2022
Cited by 1 | Viewed by 1188
Abstract
The performance of a desalination membrane depends on a specific pore size suitable for both water permeability and salt rejection. To increase membrane permeability, the applied pressure should be increased, which creates the need to improve membrane stability. In this research article, a [...] Read more.
The performance of a desalination membrane depends on a specific pore size suitable for both water permeability and salt rejection. To increase membrane permeability, the applied pressure should be increased, which creates the need to improve membrane stability. In this research article, a molecular dynamics (MD) simulation was performed using ReaxFF module from Amsterdam Modeling suite (AMS) software to simulate water desalination efficiency using a single and multi-layer graphene membrane. The graphene membrane with different pore sizes and a multi-layer graphene membrane with descending pore size in each layer were designed and studied under different pressures. The stability of the membrane was checked using Material Studio 2019 by studying the dynamics summary. The single-layer graphene membrane was evaluated under pressures ranging from 100 to 500 MPa, with the salt rejection ranging from 95% to 82% with a water permeability of 0.347 × 10−9 to 2.94 × 10−9 (mm.g.cm−2s−1.bar−1), respectively. Almost 100% salt rejection was achieved for the multi-layer graphene membrane. This study successfully demonstrated the design and optimization of graphene membrane performance without functionalization. Full article
(This article belongs to the Special Issue Graphene-Based Membranes: From Synthesis to Applications)
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