Functionalized Graphene Oxide-Based Lamellar Membranes with Tunable Nanochannels for Ionic and Molecular Separation

Ali, Akbar; Rehman, Faisal; Khan, Muhammad Ali; Memon, Fida Hussain; Soomro, Faheeda; Iqbal, Muzaffar; Yang, Jun; Thebo, Khalid Hussain

doi:10.1021/acsomega.2c03907

Cited by 48 publications

(28 citation statements)

References 35 publications

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“…Other strategies also focus on the development of composite GO membranes by combining GO with other materials (i.e., nanomaterials) to impart better permeability and selectivity [14,15]. Recently, Ali et al [17] prepared PEGylated GO (PGO)based membranes by modification of GO lamellar membrane. The membranes with controlled pore sizes were functionalized with 6-armed poly(ethylene oxide) via a simple amidation route.…”

Section: Graphene Oxide-based Membranesmentioning

confidence: 99%

“…Generally, it is widely believed that the incorporation of GO into the membrane matrix can significantly enhance the membrane hydrophilicity and porosity, thus improving overall membrane performance and efficiency [16,17,33,34,35]. For example, promising results were reported by Rafal Sitko et al [34] on the effective adsorption of heavy metals ions (cobalt, nickel, copper, zinc, cadmium and lead) by GO/cellulose membranes.…”

Section: Go/polymer-based Membranesmentioning

confidence: 99%

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Graphene Oxide for Adsorptive Ultrafiltration Membranes

Nazri

2023

AMST

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Adsorptive ultrafiltration membrane is an emerging field that holds great promise for achieving high efficiency removal of various pollutants such as metal ions and organic pollutants. As a result, significant research efforts have been directed towards the utilization of GO due to its unique properties including good hydrophilicity, large surface area, excellent chemical and mechanical stability which can impart better membrane properties and performance. Recent advances in this field revealed that the utilization of graphene oxide (GO) is highly beneficial in improving key membrane properties including surface charge, hydrophilicity, water permeability as well as the adsorption performance. Therefore, this short review provides valuable insight into the performance of GO/GO modified-based membranes, GO/polymeric-based membrane and GO-modified/polymeric-based membrane for various pollutants. The application of GO in ultrafiltration (UF) membranes is anticipated to provide an attractive and viable route towards achieving high performance adsorptive UF membranes for water and wastewater treatment.

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Section: Graphene Oxide-based Membranesmentioning

confidence: 99%

Section: Go/polymer-based Membranesmentioning

confidence: 99%

Graphene Oxide for Adsorptive Ultrafiltration Membranes

Nazri

2023

AMST

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“…However, very less work has been done on separation of heavy metals. In this regard, GO has been modified by various molecules and methods to control the pore structure. − Among them, GO nanosheet modification with green molecules, − metal oxides, − polymers, , etc., is the most common. Jin et al functionalized GO with polydopamine (PD) and polyethyleneimine (PEI) for separation of Cu 2+ , Cd 2+ , Pb 2+ , and Hg 2+ .…”

Section: Introductionmentioning

confidence: 99%

Lamellar Graphene Oxide-Based Composite Membranes for Efficient Separation of Heavy Metal Ions and Desalination of Water

Janwery

Memon

et al. 2023

ACS Omega

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Sufficient efforts have been carried out to fabricate highly efficient graphene oxide (GO) lamellar membranes for heavy metal ion separation and desalination of water. However, selectivity for small ions remains a major problem. Herein, GO was modified by using onion extractive (OE) and a bioactive phenolic compound, i.e., quercetin. The asprepared modified materials were fabricated into membranes and used for separation of heavy metal ions and water desalination. The GO/onion extract (GO/OE) composite membrane with a thickness of 350 nm shows an excellent rejection efficiency for several heavy metal ions such as Cr 6+ (∼87.5%), As 3+ (∼89.5%), Cd 2+ (∼93.0%), and Pb 2+ (∼99.5%) and a good water permeance of ∼460 ± 20 L m −2 h −1 bar −1 . In addition, a GO/quercetin (GO/Q) composite membrane is also fabricated from quercetin for comparative studies. Quercetin is an active ingredient of onion extractives (2.1% w/w). The GO/Q composite membranes show good rejection up to ∼78.0, ∼80.5, ∼88.0, and 95.2% for Cr 6+ , As 3+ , Cd 2+ , and Pb 2+ , respectively, with a DI water permeance of ∼150 ± 10 L m −2 h −1 bar −1 . Further, both membranes are used for water desalination by measuring rejection of small ions such as NaCl, Na 2 SO 4 , MgCl 2 , and MgSO 4 . The resulting membranes show >70% rejection for small ions. In addition, both membranes are used for filtration of Indus River water and the GO/Q membrane shows remarkably high separation efficiency and makes river water suitable for drinking purpose. Furthermore, the GO/QE composite membrane is highly stable up to ∼25 days under acidic, basic, and neutral environments as compared to GO/Q composite and pristine GO-based membranes.

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“…Recently, GO have attracted enormous attention as a filter material in membrane technology for desalination, organic solvent nanofiltration, pervaporation, and gas separation applications [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. GO contains various oxygen functional groups on its edges and basal plane.…”

Section: Introductionmentioning

confidence: 99%

“…Further, interlayer spacing between 2D sheets is also controlled by the reduction of GO sheets using thermal treatment, the green method, and a chemical approach [ 30 , 31 , 32 ]. However, controlling nanopore structure and interlayer spacing is still a challenging task for the scientific community [ 7 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

Ultrathin Graphene Oxide-Based Nanocomposite Membranes for Water Purification

et al. 2023

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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.

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Functionalized Graphene Oxide-Based Lamellar Membranes with Tunable Nanochannels for Ionic and Molecular Separation

Cited by 48 publications

References 35 publications

Graphene Oxide for Adsorptive Ultrafiltration Membranes

Graphene Oxide for Adsorptive Ultrafiltration Membranes

Lamellar Graphene Oxide-Based Composite Membranes for Efficient Separation of Heavy Metal Ions and Desalination of Water

Ultrathin Graphene Oxide-Based Nanocomposite Membranes for Water Purification

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