Hierarchical underwater oleophobic electro-ceramic/carbon nanostructure membranes for highly efficient oil-in-water separation

Anis, Shaheen Fatima; Lalia, Boor Singh; Hashaikeh, Raed; Hilal, Nidal

doi:10.1016/j.seppur.2021.119241

Cited by 25 publications

(6 citation statements)

References 36 publications

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“…Although the MXene-based membranes initially exhibited high permeation flux, fouling still occurred during the filtration process. In the dead-end configuration used to assess fouling resistance, oil tends to accumulate near the membranes, making fouling more apparent and noticeable in this type of separation setup . On the other hand, the data on flux decline reveal a significant improvement in the fouling resistance of the MXene-based membranes after functionalization with SPDA.…”

Section: Resultsmentioning

confidence: 99%

Highly Permeable Sulfonated Polydopamine Integrated MXene Membranes for Efficient Surfactant-Stabilized Oil-in-Water Separation

Baig,

Khan,

Salhi

et al. 2023

Langmuir

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MXene is an incredibly promising two-dimensional material with immense potential to serve as a high-performing separating or barrier layer to develop advanced membranes. Despite the significant progress made in MXene membranes, two major challenges still exist: (i) effectively stacking MXene nanosheets into defect-free membranes and (ii) the high fouling tendency of MXene-based membranes. To address these issues, we employed sulfonated polydopamine (SPD), which simultaneously serves as a binding agent to promote the compact assembling of Ti3C2T x MXenes (MX) nanosheets and improves the antifouling properties of the resulting sulfonated polydopamine-functionalized MX (SPDMX) membranes. The SPDMX membrane was tested for challenging surfactant-stabilized oil-in-water separation with an impressive efficiency of 98%. Moreover, an ultrahigh permeability of 1620 LMH/bar was also achieved. The sulfonation of PD helps in improving the antifouling characteristics of SPDMX by developing a strong hydration layer and enhancing the oleophobicity of the membrane. The underwater SPDMX membrane appeared superoleophobic with an oil contact angle of 153°, whereas the ceramic membrane exhibited an oil contact angle of 137°. The SPDMX membranes showed an improved flux recovery (31%) compared to the nonsulfonated counterpart. This work highlights the appropriate functionalization of MXene as a promising approach to developing MXene membranes with high permeation flux and better antifouling characteristics for oily wastewater treatment.

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Section: Resultsmentioning

confidence: 99%

Highly Permeable Sulfonated Polydopamine Integrated MXene Membranes for Efficient Surfactant-Stabilized Oil-in-Water Separation

Baig,

Khan,

Salhi

et al. 2023

Langmuir

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“…However, it is important to note, that at S/L/Air systems practically water is the only liquid to show such behaviour, thanks to its relatively high surface tension (72 mN/m at 25 °C), while in the case of S/L/L-interfaces, other liquids (e.g. oil droplets on an underwater oleophobic surface, under water [37,38]) can display similar characteristics, as well.…”

Section: Classification Of Surface Texturementioning

confidence: 99%

Fundamentals and utilization of solid/ liquid phase boundary interactions on functional surfaces

Mérai

Deák

Dékány

et al. 2022

Advances in Colloid and Interface Science

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“…11 In most cases, these composite ceramic membranes were simply deposited onto a supporting ceramic membrane or bonded via a polymerization crosslinking. As such, the vacuum infiltrated composite membranes have poor thermal stability and/or tend to degrade at temperatures above 600 • C. 12 We also note that the vacuum infiltration method is currently limited to composite ceramic membranes.…”

Section: Introductionmentioning

confidence: 99%

Melded ceramic membranes: A novel fabrication method for ultrathin alumina membranes of high performance

Kirk

et al. 2022

J Am Ceram Soc.

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Conventional ceramic membranes are usually fabricated on porous ceramic substrates, using a repetitive coating-sintering process to form a multilayered structure. This results in lengthy fabrication periods and high fabrication costs. In this work, we developed a novel fabrication process, melding, by combining vacuum infiltration and pore tuning techniques to directly construct the ceramic membrane layer within the porous ceramic substrate. By careful selection of powder sizes, the detrimental penetration effect can be modified into a benefit, forming an ultrathin membrane layer with thickness less than 1.45 µm after sintering at 1200 • C. Compared favorably with dip-coated ceramic membranes, the melded ceramic membrane had much smaller nominal pore sizes (0.19 vs 0.31 µm), but much higher water permeance (>60%). The melded ceramic membrane also had the highest rejection (98.5%) toward 125 nm polystyrene latex suspensions (2 ppm), highest sustained oil removal efficiency (>90%) under oilin-water emulsion (200 ppm) filtration, and the least irreversible fouling (<8.6%). The melding process also significantly reduced the raw powders required, leading to an 86% reduction in material costs, as compared to the multilayered ceramic membranes.

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Hierarchical underwater oleophobic electro-ceramic/carbon nanostructure membranes for highly efficient oil-in-water separation

Cited by 25 publications

References 36 publications

Highly Permeable Sulfonated Polydopamine Integrated MXene Membranes for Efficient Surfactant-Stabilized Oil-in-Water Separation

Highly Permeable Sulfonated Polydopamine Integrated MXene Membranes for Efficient Surfactant-Stabilized Oil-in-Water Separation

Fundamentals and utilization of solid/ liquid phase boundary interactions on functional surfaces

Melded ceramic membranes: A novel fabrication method for ultrathin alumina membranes of high performance

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