Interfacial polymerized and pore-variable covalent organic framework composite membrane for dye separation

Wang, Ting; Wu, Hongyu; Zhao, Song; Zhang, Wen; Tahir, Muhammad Nawaz; Wang, Zhi; Wang, Jixiao

doi:10.1016/j.cej.2019.123347

Cited by 153 publications

(52 citation statements)

References 55 publications

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“…The nodal lines resulted from standing vibrational waves are exploited to describe the square and semicircle vibrations of heteroaromatic ring functions. The different bands relating to the triazine rings square (1549 cm −1 ) and semicircle stretching (1471 cm −1 ) are observed in the SNW‐1 nanoparticles spectrum, denoting the effective melamine introduction into the COF network 10 . The bands which could be related to the imine linkages like the stretching vibration of C═N are not found.…”

Section: Resultsmentioning

confidence: 92%

“…There are different types of methods for membrane modification, which one of the most important is the use of nanomaterials 7 . To enhance the performance of membrane separation, micro/nanomaterials are synthesized and mixed into polymeric bodies to alter the phase composition, mechanism of formation and passage channels to resulting high‐performance mixed‐matrix membranes (MMMs) 8–11 . The application of inorganic materials in the membrane has mostly limited owing to the meager adaptability between the polymer phase and inorganic particles causes separation efficiency to decrease 12 .…”

Section: Introductionmentioning

confidence: 99%

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A melamine‐based covalent organic framework nanomaterial as a nanofiller in polyethersulfone mixed matrix membranes to improve separation and antifouling performance

Vatanpour

Paziresh

2021

J of Applied Polymer Sci

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This research reported developing a polyethersulfone (PES) membrane using covalent organic frameworks (COFs) nanoparticle with a mean dimension of 30 nm. The SNW‐1 (Schiff‐based network) COF was synthesized using precursors of melamine and terephthalic acid and then characterized by XRD, SEM, TEM, and FTIR analyses. The influence of different loadings of the COF was evaluated on the permeability, antifouling behavior and dye/salt rejection. The addition of SNW‐1 caused a reduction in surface roughness and an improvement in hydrophilicity of the nanocomposite membranes, which improved their flux and fouling resistance considerably. The improvement of water flux, 2.6 times, was observed by adding 0.5 wt% COF to the membrane matrix. The 0.5 wt% COF membrane presented the best water permeability, 38.9 L/m2 h bar BSA solution flux, dye rejection of 98.7% for Reactive Green 19 and 62.6% for Reactive yellow 39, 52.9% Na2SO4 and 24.5% NaCl salt rejections. Zeta potential and salt rejection trend indicated a negative surface charge on the nanocomposite membrane. Fouling experiments by BSA protein solution exhibited that the FRR reached 88.9% for 2 wt% COF membrane. Thus, employing SNW‐1 into PES matrix resulted in a promising nanofiltration membrane for dye separation and moderate salt separation with suitable antifouling properties.

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Section: Resultsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

A melamine‐based covalent organic framework nanomaterial as a nanofiller in polyethersulfone mixed matrix membranes to improve separation and antifouling performance

Vatanpour

Paziresh

2021

J of Applied Polymer Sci

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“…Moreover, the C=N stretching at 1561 cm À 1 in the Me monomer undergoes redshift and overlaps with C=N at 1579 cm À 1 from the enol structure in the TpPaMe COF membrane. [15] These results indicate the formation of Schiff base COF skeleton and the Me monomer participates in the polymerization reaction during the formation of TpPaMe COF membrane.…”

mentioning

confidence: 73%

“…The C 1s spectrum of TpPa (Figure 2e) shows the component peaks at 284.69 and 286.10 eV, which can be ascribed to the covalent bond of CÀ C/C=C and CÀ N, respectively. [17] Compared to the C 1s spectrum of TpPaMe membrane (Figure 2f), the C=O/C=N peak at 288.50 eV [15] increases from 9.93% to 13.02%, and CÀ N drastically decreases from 30.36% to 17.65%. Besides, the N element content increases from 8.76% in TpPa membrane to 10.22% in TpPaMe membrane (Table S1).…”

mentioning

confidence: 93%

“…[12] This strategy is accomplished by linker mixing or linker exchange and has been successfully applied to ZIF membranes, [13] silica membranes, [14] and COF membranes. [15] For instance, Jeong et al fabricated eIm/ZIF-8 mixed-linker hybrid membrane by doping 2-ethylimidazole (eIm) into ZIF-8 framework. The eIm affected the morphology of ZIF-8 framework and enhanced the permeance of propylene and propane compared to the ZIF-8 membrane.…”

mentioning

confidence: 99%

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Melamine‐Doped Covalent Organic Framework Membranes for Enhanced Hydrogen Purification

Zheng

Hou

Liu

et al. 2021

Chemistry An Asian Journal

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Covalent organic frameworks (COFs) are promising materials for membrane separation thanks to their adjustable topological structures and surface properties of nanopores. Herein, a melamine (Me)-doped COF membrane was fabricated by chemically doping the melamine monomer into TpPa COF, which is formed by the condensation reaction between the 1,3,5-triformylphloroglucinol (Tp) and p-phenylenediamine (Pa) monomers via interfacial polymerization. The introduction of melamine monomer allows altering both the pore structure and pore surface of the TpPa COF membrane, leading to enhanced hydrogen purification performance. Specifically, the separation factor of H 2 /CO 2 gas mixture by using the melamine doped TpPa COF (TpPaMe COF) membrane reaches 12.7, with a hydrogen permeance of 727 GPU, in sharp contrast to the relatively low separation factor and gas permeance of 7.5 and 618 GPU of the undoped TpPa membrane. Besides, the TpPaMe COF membrane shows good running stability, with H 2 /CO 2 separation performance well surpasses the Robeson 2008 upper bound.

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Surface Charge Modification on 2D Nanofluidic Membrane for Regulating Ion Transport

Xie

Tang

Qin

et al. 2022

Adv Funct Materials

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2D nanofluidic membranes are capable of regulating ion transport toward various applications concerning energy and environment, which is primarily contributed by the excess charge on the interior surface of narrow nanoscale pores. However, there is still a lack of comprehensive summaries and discussions on the surface charge modification principles and strategies of 2D nanofluidic membranes, as well as the practical applications of charge‐modified 2D nanofluidic membranes for regulating ion transport. In this review, the surface charge modification principles and charge modification methods of 2D nanofluidic membranes are first introduced in detail, which is of great significance for improving the ion regulation capability of membranes and realizing the design of nanochannel materials. Next, recent advances in the two typical applications of concentration cells and water treatment based on charge‐modified 2D nanofluidic membranes are summarized. Finally, some challenges and prospects related to charge‐modified 2D nanofluidic membranes are discussed to indicate directions for future research in this field. It is anticipated that this review will provide valuable strategies for the development of high‐performance charge‐modified 2D nanofluidic membranes toward energy and environment applications.

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Interfacial polymerized and pore-variable covalent organic framework composite membrane for dye separation

Cited by 153 publications

References 55 publications

A melamine‐based covalent organic framework nanomaterial as a nanofiller in polyethersulfone mixed matrix membranes to improve separation and antifouling performance

A melamine‐based covalent organic framework nanomaterial as a nanofiller in polyethersulfone mixed matrix membranes to improve separation and antifouling performance

Melamine‐Doped Covalent Organic Framework Membranes for Enhanced Hydrogen Purification

Surface Charge Modification on 2D Nanofluidic Membrane for Regulating Ion Transport

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