Graphene quantum dots (GQDs)-assembled membranes with intrinsic functionalized nanochannels for high-performance nanofiltration

Lin, Yuqing; Shen, Qin; Kawabata, Yuki; Segawa, Jumpei; Cao, Xingzhong; Guan, Kecheng; Istirokhatun, Titik; Yoshioka, Tomohisa; Matsuyama, Hideto

doi:10.1016/j.cej.2020.127602

Cited by 59 publications

(21 citation statements)

References 60 publications

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“…materials which contain or release nanostructures but not nanoparticles. 67 Future applications of that approach might explore cementitious systems, 68 superconductive cables, water purification systems, [69][70][71] and even more. 72…”

Section: Discussionmentioning

confidence: 99%

Aerogels are not regulated as nanomaterials, but can be assessed by tiered testing and grouping strategies for nanomaterials

Keller

Wiemann²,

Gröters

et al. 2021

Nanoscale Adv.

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Section: Discussionmentioning

confidence: 99%

Aerogels are not regulated as nanomaterials, but can be assessed by tiered testing and grouping strategies for nanomaterials

Keller

Wiemann²,

Gröters

et al. 2021

Nanoscale Adv.

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“…A new series of thin film composite membranes (TFC) has been synthesized based on graphene quantum dots (GQDs), modified with amino and sulfonic acid groupings on the surface, using GQDs as nanochannels for highperformance nanofiltration [37]. The membranes were able to remove Na + , Ca 2+ , and Mg 2+ in percentages between 98 and 45%.…”

Section: Performances Of Graphene-based Composite Nanofiltration Membranesmentioning

confidence: 99%

Graphene-based composite membranes for nanofiltration: performances and future perspectives

Voicu

Thakur

2021

emergent mater.

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Nanofiltration is one of the most widely used membrane processes for water purification with high practical value because of a large number of chemical species that are separated through this process. Usually, for nanofiltration, high energy–consuming operations are involved including the generation of enough pressure for the rejection of jumps and lower molecular weight chemicals at the surface of the membrane. Recent developments in the synthesis of nanocomposite membranes with graphene and graphene derivatives have led to an increase in energy requirements and the increase in membranes performances. In the present review, we have presented the recent advances in the field of graphene-based composite membranes for nanofiltration with applications for both types of based solvents—aqueous solutions and organic solvents. The presentation will be focused especially on the performances of membranes and applications of these materials for the rejection of salts (Na+, Mg2+), heavy metals (Li2+), and lower molecular weight organic compounds (methylene blue, Congo red, Direct Red, Methyl orange, Reactive green 13, etc.). Modern synthesis methods like interfacial polymerization for obtaining thin-film composite nanofiltration membranes are also presented.

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“…Polymers are the most employed materials for synthesizing membranes with high permselectivity, which easily suffer from membrane fouling under demanding conditions and cannot satisfy the practical applications of complicated natural organic matter (NOM) compositions . This is because the rejected foulants are prone to directly accumulating onto the relatively hydrophobic polymer surfaces and then deteriorate the permeability and filtration effectiveness of membranes. , Even though a variety of post-treatments, such as membrane cleaning, can be used to mitigate surface fouling, the permeating performance can only be partially restored; furthermore, the degradation of the polymeric matrix is inevitable . Inorganic membranes that constitute metal oxides have also been broadly utilized in treating wastewater containing various contaminants with better fouling-resistant and fouling-releasing advantages when compared to conventional polymer membranes. , This can be mainly ascribed to the metal oxides with high surface free energy in favor of capturing water molecules within their micro-/nanostructures to form a continuous hydration layer, serving as a physical barrier to inhibit the oil adhesion, protein adsorption, or cell attachments .…”

Section: Introductionmentioning

confidence: 99%

Surface Mineralization of the TiO₂–SiO₂/PES Composite Membrane with Outstanding Separation Property via Facile Vapor-Ventilated In Situ Chemical Deposition

et al. 2022

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Conventional polymeric membranes are broadly employed in water treatment processes; however, most of them suffer from relatively low water permeance and severe membrane fouling phenomena owing to their relatively hydrophobic nature. In this work, a novel class of inorganic–organic composite membranes was developed through a newly developed vapor-ventilated in situ chemical deposition method, where the Ti and Si precursors were first hydrolyzed and then conferred into metal oxides to form a continuous TiO2–SiO2 modification layer. Owing to the distinct physicochemical properties, the Ti and Si precursors were leveraged as quasi-molecular regulators to tune the membrane surface chemistry and pore aperture (within the nanoscale) to benefit highly efficient water purification by underpinning the rapid transport of water molecules and featuring an excellent fouling-resistant and fouling-releasing property against typical pollutants. The as-developed TiO2–SiO2/PES composite membrane showed a high water permeance of 187.4 L·m–2·h–1·bar–1, together with a relatively small mean pore aperture of 4.2 nm, showing an outstanding permeating efficiency among state-of-the-art membranes with a similar separation accuracy. This study provides a paradigm shift in membrane materials that could open avenues for developing high-performance inorganic–organic composite membranes for complex wastewater treatment.

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Graphene quantum dots (GQDs)-assembled membranes with intrinsic functionalized nanochannels for high-performance nanofiltration

Cited by 59 publications

References 60 publications

Aerogels are not regulated as nanomaterials, but can be assessed by tiered testing and grouping strategies for nanomaterials

Aerogels are not regulated as nanomaterials, but can be assessed by tiered testing and grouping strategies for nanomaterials

Graphene-based composite membranes for nanofiltration: performances and future perspectives

Surface Mineralization of the TiO₂–SiO₂/PES Composite Membrane with Outstanding Separation Property via Facile Vapor-Ventilated In Situ Chemical Deposition

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Graphene quantum dots (GQDs)-assembled membranes with intrinsic functionalized nanochannels for high-performance nanofiltration

Cited by 59 publications

References 60 publications

Aerogels are not regulated as nanomaterials, but can be assessed by tiered testing and grouping strategies for nanomaterials

Aerogels are not regulated as nanomaterials, but can be assessed by tiered testing and grouping strategies for nanomaterials

Graphene-based composite membranes for nanofiltration: performances and future perspectives

Surface Mineralization of the TiO2–SiO2/PES Composite Membrane with Outstanding Separation Property via Facile Vapor-Ventilated In Situ Chemical Deposition

Contact Info

Product

Resources

About

Surface Mineralization of the TiO₂–SiO₂/PES Composite Membrane with Outstanding Separation Property via Facile Vapor-Ventilated In Situ Chemical Deposition