Functionalized graphene oxide based membranes for ultrafast molecular separation

Janjhi, Farooque Ahmed; Chandio, Imamdin; Memon, Ayaz Ali; Ahmed, Zubair; Thebo, Khalid Hussain; Pirzado, Azhar Ali Ayaz; Hakro, Ayaz Ali; Iqbal, Muzaffar

doi:10.1016/j.seppur.2020.117969

Cited by 66 publications

(23 citation statements)

References 31 publications

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“…Therefore, the separation ability of the amide-COF membrane is mainly related to the molecular sieve. In general, compared with the nanofiltration membranes reported in the literature, ,− the rejection rate of MB and the water flux of the amide-COF membrane are all at a higher level (Figure e and Table S1, Supporting Information), which shows that membranes from amide-linked COFs are promising candidates as high-performance membrane materials.…”

Section: Resultsmentioning

confidence: 73%

Polyamide Covalent Organic Framework Membranes for Molecular Sieving

Zhou

et al. 2022

ACS Appl. Mater. Interfaces

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Polyamide is an important class of membrane materials for separation technology. The polyamide membranes currently used are amorphous, and thus, their pore structures are disordered, which inevitably decreases their performance in separation. Herein, we report a new type of polyamide membranes which are fabricated from amide-linked covalent organic frameworks (COFs), a class of crystalline porous polymers with well-ordered pore structures. Thanks to the structural advantages of amide-linked COFs, the polyamide COF membranes not only exhibit high permeability (482.3 L m–2 h–1 bar–1 to water) and high rejection rate to organic dyes (>99% for methylene blue) but also display excellent stability under a harsh environment. The vantage of the polyamide COF membranes is also manifested by the comparison of their mechanical property, stability, and separation performance with that of the membranes fabricated from the COFs having the same building blocks but linked with imine and amine linkages. This work demonstrates that amide-linked COFs, which combine the structural features of COFs and polyamide, could be a new type of advanced materials for the fabrication of high-performance separation membranes.

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Section: Resultsmentioning

confidence: 73%

Polyamide Covalent Organic Framework Membranes for Molecular Sieving

Zhou

et al. 2022

ACS Appl. Mater. Interfaces

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“…Not only these, numerous research studies are reported in view of the performance of such composite membranes using graphene oxide. In a study, GO was functionalized with ginger plant extractive, and the membranes showcased a water permeance almost 15 times as that of pristine GO (around ∼420 ± 10 L m –2 h –1 bar –1 ) and varied the permeation performance with the thickness of the membrane . A work synthesized membranes made of a unique kind of GO based composites with a relatively high d -spacing .…”

Section: Class 1: Laminar Membranesmentioning

confidence: 99%

Structure Dependent Water Transport in Membranes Based on Two-Dimensional Materials

Bakshi

Bustamante

Sui

et al. 2021

Ind. Eng. Chem. Res.

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The upsurge in population and industrialization has instigated the demand in improvement in the existing water purification systems. Numerous organic, and later inorganic materials, have showcased huge potential in different membrane separation processes. Recently, a novel range of two-dimensional (2D) materials possessing atomic thickness, high robustness, excellent mechanical stability, and even great fouling resistance have shown their appealing potential as membrane materials in this respect. The high aspect ratios of 2D materials enable the feasible control of membrane assembled structures. The membrane structure of 2D materials plays a crucial role in separation performance. Regarding the molecular transport pathway, the assembled structure is categorized into laminates and in-plane pores here. From this aspect, this review discusses the most recently progress of 2D materials membranes, including graphene-based materials, MXenes, transition metal dichalcogenides, metal organic frameworks, covalent organic frameworks, and boron nitride, in the field of water purification. According to their membrane assembled structures, the design strategies with separation mechanism and separation performance have been reviewed. Lastly, challenges and futuristic upgrades to enhance their membrane operation are discussed accordingly. This review provides a new perspective of 2D material assemblies on membrane design for advancing separation performance in water purification.

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“…Due to these versatile properties of GO, it has been considered as potential candidate for water purification, desalination, degradation, decontamination, sterilization, etc. 40–50.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Graphene Oxide‐Based Membranes for Heavy Metal Ions Separation

et al. 2022

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Graphene oxide (GO)‐based membranes have been widely investigated for separation of dyes, salt ions, heavy metal ions, and biomolecules due to their high mechanical strength, single‐layered structure, large surface area, and high affinity. However, due to irregular pore structure, nanochannels, interlayer distance, easy functionalization, swelling effect, and chemical stability under aqueous environment limited their separation efficiency. In this review, different fabrication methods of GO membranes are summarized. The role of functionalization and cross‐linking on membrane's structural properties, separation performance, and practical applications are discussed. Further, the GO‐based membranes (GOMs) for separation and removal of heavy metal ions are discussed in detail. The factors which influence the separation performance are also highlighted. Finally, recommendations and future directions are suggested.

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Functionalized graphene oxide based membranes for ultrafast molecular separation

Cited by 66 publications

References 31 publications

Polyamide Covalent Organic Framework Membranes for Molecular Sieving

Polyamide Covalent Organic Framework Membranes for Molecular Sieving

Structure Dependent Water Transport in Membranes Based on Two-Dimensional Materials

Recent Advances in Graphene Oxide‐Based Membranes for Heavy Metal Ions Separation

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