A novel and facile preparation of Superhydrophilic/Superoleophobic nanofilter using carbon nitride nanosheet for W/O emulsion separation

Mir, Sonia; Rahidi, Ali morad; Naderifar, Abbas; Alaei, Mahshad

doi:10.1016/j.seppur.2021.120279

Cited by 20 publications

(5 citation statements)

References 47 publications

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“…This lower flux compared to that of W/O emulsion separation could be attributed to the reduction in pore size of ZIF-8@PMS-3 caused by the elongation of the polymeric chains upon the stimulation of CO 2 . In addition, Table summarizes the comparison of separation properties of similar separation materials, which presented that the as-prepared ZIF-8@PMS-3 had superior separation properties. − Until now, it can conclude from the above-mentioned results that the as-obtained ZIF-8@PMS-3 could be recognized as an ideal candidate material for the highly efficient separation of both surfactant-stabilized W/O and O/W emulsions.…”

Section: Resultsmentioning

confidence: 95%

Versatile CO₂-responsive Sponges Decorated with ZIF-8 for Bidirectional Separation of Oil/Water and Controllable Removal of Dyes

Dou,

Lin,

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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The complex wastewater containing water-soluble dyes and water-insoluble oils has given rise to significant environmental concerns that demand urgent remediation. Herein, a novel "smart" multifunctional sponge (ZIF-8@PMS) stepwise decorated with ZIF-8 nanoparticles and CO 2 -responsive copolymer (poly(2-(diethylamino) ethyl methacrylate-co-3-(trimethoxysilyl)propyl acrylate-co-stearyl methacrylate) was successfully prepared for CO 2 controllable oil/water separation and dyes removal. The results revealed that the sponge coated with CO 2 -responsive copolymer for three cycles

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Section: Resultsmentioning

confidence: 95%

Versatile CO₂-responsive Sponges Decorated with ZIF-8 for Bidirectional Separation of Oil/Water and Controllable Removal of Dyes

Dou,

Lin,

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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“…[ 10 ] These types of materials easily allow for oil permeation and water to be repelled, and are named “oil‐removing” materials. [ 5a,11 ] Superhydrophilic‐underwater superoleophobic porous materials with small pore sizes include TiO 2 [ 12 ] and γ‐Al 2 O 3 composite membranes, [ 13 ] membranes coated with silica nanospheres, [ 14 ] and meshes coated with graphene oxide. [ 15 ] These materials are suitable for the separation of oil‐in‐water emulsions.…”

Section: Introductionmentioning

confidence: 99%

3D‐Printed Robust Dual Superlyophobic Ti‐Based Porous Structure for Switchable Oil/Water Emulsion Separations

Yang

Ren

Zhou

et al. 2023

Adv Funct Materials

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Smart surfaces with responsive wettability are unstable, and depend upon continuous external stimuli, which limits their widespread application in switchable oil/water emulsions separations. In this study, a Ti‐based 3D porous structure (SLM‐3DTi) is printed using advanced selective laser melting (SLM) technology for the switchable separation of oil/water emulsion. With the assistance of the computer program, porous structure and re‐entrant texture can be easily designed and printed in one step. Without any continuous external stimulus, the wettability of SLM‐3DTi can be reversibly switched between underwater superoleophobicity and underoil superhydrophobicity simply by drying and washing cycles. The SLM‐3DTi achieves switchable surfactant‐stabilized oil‐in‐water emulsion (SSE(o/w)) and surfactants‐stabilized water‐in‐oil emulsion (SSE(w/o)) separation with purity above 99.8% at a flux of more than 2000 L m−2 h−1. In addition, the re‐entrant texture of the SLM‐3DTi surface is formed with the partially melting powder particles on the part contour, which has much stronger mechanical durability than any binder. Furthermore, SLM‐3DTi has excellent corrosion resistance due to the material properties of Ti. More importantly, based on the visualization analysis of the simulation, the mechanism of SLM‐3DTi emulsion separation is further elucidated. Therefore, SLM‐3DTi has broad practical application potential for high‐flux, high‐purity, and switchable oil/water emulsion separation.

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“…Research has also shown that graphitic carbon nitride (g-C 3 N 4 ) is capable of self-cleaning and separation due to its wettability. The stability and unique physicochemical characteristics of the g-C 3 N 4 in alkaline or acidic media have attracted much research interest as a new carbon nanomaterial. , The preparation of 2D g-C 3 N 4 nanosheets by the exfoliation process has increasingly enhanced its photocatalytic activity and wettability in oil–water separation. − Furthermore, g-C 3 N 4 can also be incorporated to provide a self-cleaning function to the membrane. , …”

Section: Introductionmentioning

confidence: 99%

Development of Self-Cleaning g-C₃N₄/Zn(OH)₂ Nanocomposite-Coated Mesh for Oil–Water Emulsion Separation

Mir

Naderifar

Rashidi³

et al. 2023

Ind. Eng. Chem. Res.

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It has been widely recognized that efficient approaches to water–oil separation need to be developed and designed. It is the objective of this study to improve and optimize the performance of g-C3N4 for oil–water separation by anchoring Zn(OH)2. Additionally, the as-prepared g-C3N4/Zn(OH)2 nanocomposites containing different amounts of Zn(OH)2 were investigated to determine the effect of two factors of porosity and surface defects in the water-removing of oil–water mixtures. The results show that oxygen-containing groups in this specific g-C3N4/Zn(OH)2 nanocomposite have a greater impact on wettability behavior and water-removing separation performance than porosity. Density functional theory (DFT) calculations demonstrated that the adsorption energy of water is larger than that of oil molecules on the g-C3N4/Zn(OH)2, confirming that the prepared coated mesh can be used as a potential material for water–oil separation. Moreover, the self-cleaning property of the nanocomposite-coated mesh was demonstrated by the removal of adsorbed oil in contact with the surface. In this study, it was also attempted to perform water and oil separation with good performance. Therefore, the perfluorooctanoic acid (PFOA) was also used to reduce energy in g-C3N4@Zn(OH)2@PFOA mesh, leading to super-hydrophilic/super-oleophobic wettability. Ultimately, a new mesh coated with g-C3N4@Zn(OH)2@PFOA nanocomposite was successfully separated oil-in-water emulsion with a high efficiency of 99.99%.

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A novel and facile preparation of Superhydrophilic/Superoleophobic nanofilter using carbon nitride nanosheet for W/O emulsion separation

Cited by 20 publications

References 47 publications

Versatile CO₂-responsive Sponges Decorated with ZIF-8 for Bidirectional Separation of Oil/Water and Controllable Removal of Dyes

Versatile CO₂-responsive Sponges Decorated with ZIF-8 for Bidirectional Separation of Oil/Water and Controllable Removal of Dyes

3D‐Printed Robust Dual Superlyophobic Ti‐Based Porous Structure for Switchable Oil/Water Emulsion Separations

Development of Self-Cleaning g-C₃N₄/Zn(OH)₂ Nanocomposite-Coated Mesh for Oil–Water Emulsion Separation

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A novel and facile preparation of Superhydrophilic/Superoleophobic nanofilter using carbon nitride nanosheet for W/O emulsion separation

Cited by 20 publications

References 47 publications

Versatile CO2-responsive Sponges Decorated with ZIF-8 for Bidirectional Separation of Oil/Water and Controllable Removal of Dyes

Versatile CO2-responsive Sponges Decorated with ZIF-8 for Bidirectional Separation of Oil/Water and Controllable Removal of Dyes

3D‐Printed Robust Dual Superlyophobic Ti‐Based Porous Structure for Switchable Oil/Water Emulsion Separations

Development of Self-Cleaning g-C3N4/Zn(OH)2 Nanocomposite-Coated Mesh for Oil–Water Emulsion Separation

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Product

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Versatile CO₂-responsive Sponges Decorated with ZIF-8 for Bidirectional Separation of Oil/Water and Controllable Removal of Dyes

Versatile CO₂-responsive Sponges Decorated with ZIF-8 for Bidirectional Separation of Oil/Water and Controllable Removal of Dyes

Development of Self-Cleaning g-C₃N₄/Zn(OH)₂ Nanocomposite-Coated Mesh for Oil–Water Emulsion Separation