Enhanced sieving from exfoliated MoS2 membranes via covalent functionalization

Ries, Lucie; Petit, Eddy; Michel, Thierry; Diogo, Cristina Coelho; Gervais, Christel; Salameh, Chrystelle; Bechelany, Mikhaël; Balme, Sébastien; Miele, Philippe; Onofrio, Nicolas; Voiry, Damien

doi:10.1038/s41563-019-0464-7

Cited by 238 publications

(159 citation statements)

References 62 publications

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“…Further issues related to water are the behaviour of oil films [3], the synthesis of nano-materials for medical applications [4,5], the behaviour of two-dimensional materials [6], and the behaviour of colloidal suspensions [7,8]. The functional mechanism of membranes [9,10] is also a relevant class. The description of all these systems requires good knowledge of the dielectric function of water on the real frequency axis as well as, for calculation of van der Waals interactions, imaginary frequencies.…”

Section: Introductionmentioning

confidence: 99%

Full-Spectrum High-Resolution Modeling of the Dielectric Function of Water

et al. 2020

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In view of the vital role of water in chemical and physical processes, an exact knowledge of its dielectric function over a large frequency range is important. In this article we report on currently available measurements of the dielectric function of water at room temperature (25 • C) across the full electromagnetic spectrum: microwave, IR, UV and X-ray (up to 100 eV). We provide parameterisations of the complex dielectric function of water with two Debye (microwave) oscillators and high resolution of IR and UV/X-ray oscillators. We also report dielectric parameters for ice-cold water with a microwave/IR spectrum measured at 0.4 • C, while taking the UV spectrum from 25 • C (assuming negligible temperature dependence in UV). We illustrate the consequences of the model via calculations of van der Waals interactions of gas molecules near water surfaces, and an assessment of the thickness of water films on ice and ice films on water. In contrast to earlier models of ice-cold water, we predict that a micron-scale layer of ice is stabilised on a bulk water surface. Similarly, the van der Waals interaction promotes complete freezing rather than supporting a thin premelting layer of water on a bulk ice surface. Density-based extrapolation from warm to cold water of the dielectric function at imaginary frequencies is found to be satisfactory in the microwave but poor (40% error) at IR frequencies.

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Section: Introductionmentioning

confidence: 99%

Full-Spectrum High-Resolution Modeling of the Dielectric Function of Water

et al. 2020

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“…The excellent antifouling property is ascribed to the homogeneous distributed hydrophilic terminations on the Ti 3 C 2 T x nanosheets . These functional terminations also make it easier to form better stacking structure during vacuum filtration, resulting in better separation performance. In order to proof the stability of the used Ti 3 C 2 T x membranes after filtration, series of characterizations were carried out as shown in Figures S20–S24, including the contact angle analysis, XRD, AFM, SEM, and XPS analysis.…”

Section: Resultsmentioning

confidence: 99%

Antibiotics Separation with MXene Membranes Based on Regularly Stacked High‐Aspect‐Ratio Nanosheets

Wei

Gao

et al. 2020

Angewandte Chemie

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The uncontrolled release of antibiotics and pharmaceuticals into the environment is a worldwide increasing problem. Thus, highly efficient treatment technologies for wastewater are urgently needed. In this work, seven kinds of typical antibiotics (including water and alcohol soluble ones) are successfully separated from the corresponding aqueous and ethanolic solutions using highly regular laminated membranes. Our membranes are assembled with 2–4 μm titanium carbide nanosheets. The solvent permeance through such titanium carbide membrane is one order of magnitude higher than that through most polymeric nanofiltration membranes with similar antibiotics rejection. This high flux is due to the regular two‐dimensional (2D) structure resulting from the large aspect ratio of titanium carbide nanosheets. Moreover, the electrostatic interaction between the surface terminations and the antibiotics also affects the rejection and enhances the antifouling property. Such 2D titanium carbide membranes further broaden the application scope of laminated materials for separation and purification of high value added drugs in academia and industry.

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Section: Resultsmentioning

confidence: 99%

“…[70] Furthermore, as shown by our NEMD simulations, the desalination performance of some MWCNT (CNT4) is high enough to not require additional chemical modification unlike nanoporous graphene or assimilated 2D materials. [71] In order to rationalize the high water permeability of MWCNT, we report in Figure 5 snapshots showing the organization of water molecules in the xy plane. As shown in Figure 5a,b, water molecules organize in a similar way in the central channel of both CNT1 and CNT2 and a single water layer is observed in their inter-CNT zone.…”

Section: Resultsmentioning

confidence: 99%

Computational Assessment of Water Desalination Performance of Multi‐Walled Carbon Nanotubes

Ghoufi

Szymczyk

2020

Advcd Theory and Sims

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The desalination performance (water permeability and salt rejection) of both uncharged and charged multi‐walled carbon nanotubes (MWCNTs) is computationally assessed by means of pressure‐driven molecular dynamics simulations. It is shown that the performance of these materials surpass that of the widely used polyamide reverse osmosis membranes and are even better than 2D materials such as nanoporous graphene or boron nitride. The molecular origin of the fast water transport through MWCNT materials is ascribed to a synergic effect between the existence of a single water layer and low friction between water molecules and the carbon nanotube surface. Furthermore, for charged MWCNTs it is highlighted that the electrical charges on the nanotube surface result in a strong anchoring of ions and water molecules. This leads to clogging of the annular region between nanotubes and the generation of a force, which makes water transport through the central channel of the MWCNT faster.

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Enhanced sieving from exfoliated MoS2 membranes via covalent functionalization

Cited by 238 publications

References 62 publications

Full-Spectrum High-Resolution Modeling of the Dielectric Function of Water

Full-Spectrum High-Resolution Modeling of the Dielectric Function of Water

Antibiotics Separation with MXene Membranes Based on Regularly Stacked High‐Aspect‐Ratio Nanosheets

Computational Assessment of Water Desalination Performance of Multi‐Walled Carbon Nanotubes

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