Metal/covalent–organic framework based thin film nanocomposite membranes for advanced separations

Ge, Lei; Song, Hengjie; Zhu, Junyong; Zhang, Yatao; Zhou, Zhen; Van der Bruggen, Bart

doi:10.1039/d4ta00578c

Cited by 7 publications

(3 citation statements)

References 235 publications

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“…After introducing a MOF interlayer, the surface of the PA film turned out to have nanostriped structures, resulting from the heterogeneous diffusion rate and concentration difference of PIP monomers, leading to the instability of the reaction interface (Figures c,d and S7). − The nanostriped morphologies of the TFN membrane surface were beneficial for increasing the effective filtration area and thus the water permeance. The grooved structures on the bottom side of the PA films could also optimize the water transport paths for the TFN membranes (Figure S8).…”

Section: Resultsmentioning

confidence: 99%

Distinct Efficacies of Interlayers in Tailoring Polyamide Nanofiltration Membrane Performance for Organic Micropollutant Removal: Dependent on Substrate Characteristics

Cheng,

Liu,

Wei

et al. 2024

Environ. Sci. Technol.

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Interlayered thin-film nanocomposite (TFN) membranes have shown the potential to boost nanofiltration performance for water treatment applications including the removal of organic micropollutants (OMPs). However, the effects of substrates have been overlooked when exploiting and evaluating the efficacy of certain kinds of interlayers in tailoring membrane performance. Herein, a series of TFN membranes were synthesized on different porous substrates with identical interlayers of metal-organic framework nanosheets. It was revealed that the interlayer introduction could narrow but not fully eliminate the difference in the properties among the polyamide layers formed on different substrates, and the membrane performance variation was prominent in distinct aspects. For substrates with small pore sizes exerting severe water transport hindrance, the introduced interlayer mainly enhanced membrane water permeance by affording the gutter effect, while it could be more effective in reducing membrane pore size by improving the interfacial polymerization platform and avoiding PA defects when using a large-pore-size substrate. By matching the selected substrates and interlayers well, superior TFN membranes were obtained with simultaneously higher water permeance and OMP rejections compared to three commercial membranes. This study helps us to objectively understand interlayer efficacies and attain performance breakthroughs of TFN membranes for more efficient water treatment.

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Section: Resultsmentioning

confidence: 99%

Distinct Efficacies of Interlayers in Tailoring Polyamide Nanofiltration Membrane Performance for Organic Micropollutant Removal: Dependent on Substrate Characteristics

Cheng,

Liu,

Wei

et al. 2024

Environ. Sci. Technol.

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“…[ 10 ]. Numerous nanomaterials, for instance, metal/metal oxides, graphene oxide (GO [ 11 , 12 ]), carbon nanotubes (CNT [ 13 ]), metal–organic frameworks (MOFs [ 8 ]), and covalent organic frameworks (COFs [ 14 ]), have been incorporated into polymeric membranes. Among them, carbon dots (CDs), as a rising star in the family of carbon-based nanomaterials, have aroused broad research interests for years due to their small size, good biocompatibility, abundant functional groups, and appreciable dispersibility.…”

Section: Introductionmentioning

confidence: 99%

Recent Developments in Nanocomposite Membranes Based on Carbon Dots

He,

Meng,

Liu

et al. 2024

Polymers

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Carbon dots (CDs) have aroused colossal attention in the fabrication of nanocomposite membranes ascribed to their ultra-small size, good dispersibility, biocompatibility, excellent fluorescence, facile synthesis, and ease of functionalization. Their unique properties could significantly improve membrane performance, including permeance, selectivity, and antifouling ability. In this review, we summarized the recent development of CDs-based nanocomposite membranes in many application areas. Specifically, we paid attention to the structural regulation and functionalization of CDs-based nanocomposite membranes by CDs. Thus, a detailed discussion about the relationship between the CDs’ properties and microstructures and the separation performance of the prepared membranes was presented, highlighting the advantages of CDs in designing high-performance separation membranes. In addition, the excellent optical and electric properties of CDs enable the nanocomposite membranes with multiple functions, which was also presented in this review.

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“…16–18 COFs feature predesignable structure and desirable functions when compared to other organic porous materials. 19,20 As such, they have attracted much attention in gas adsorption and separation, 21–23 catalysis, 24–26 sensing, 27–29 photoelectricity, 30–32 and energy storage. 33–35 Besides, these materials have been intensively explored as photocatalytic water splitting catalysts.…”

Section: Introductionmentioning

confidence: 99%

Construction of porphyrin-based two-dimensional covalent organic frameworks for photocatalytic hydrogen production

Liu,

Wang,

Wang

et al. 2024

Catal. Sci. Technol.

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Metal/covalent–organic framework based thin film nanocomposite membranes for advanced separations

Abstract: Polyamide (PA) membranes fabricated using interfacial polymerization (IP) currently dominate the membrane industry and have contributed to various liquid/gas separations. Nonetheless, a major difficulty in controlling the rapid, irreversible IP...

Cited by 7 publications

References 235 publications

Distinct Efficacies of Interlayers in Tailoring Polyamide Nanofiltration Membrane Performance for Organic Micropollutant Removal: Dependent on Substrate Characteristics

Distinct Efficacies of Interlayers in Tailoring Polyamide Nanofiltration Membrane Performance for Organic Micropollutant Removal: Dependent on Substrate Characteristics

Recent Developments in Nanocomposite Membranes Based on Carbon Dots

Construction of porphyrin-based two-dimensional covalent organic frameworks for photocatalytic hydrogen production

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