A robust COF@MXene membrane for ultra-high flux of water-in-oil emulsion separation

Abstract

A facile covalent assembly strategy is proposed for the preparation of superhydrophobic COF-stabilized MXene separation membranes. Ultra-high separation fluxes of up to 54280 Lm-2h-1 and 643200 Lm-2h-1bar-1 are obtained for...

F-free etching and ingenious construction of hydrogel layer-prepared MXene membranes for oily wastewater separation

“…1 With the discovery of many excellent physical and chemical properties such as high electrical conductivity, abundant surface groups, tunable band gap, high specific surface area, and hydrophilicity, it has great potential for applications in energy storage, catalysis, optoelectronics, and separation. 2–5 In general, MXene can be obtained by etching the MAX phase, which can be expressed as M n +1 AX n ( n = 1, 2 or 3), where “M” denotes the transition metals of the first few groups, “A” refers to a main group element ( e.g. , Al, Si, or Ga), and “X” refers to C or N. 6 So far, F-containing solution etching is the most classical preparation method with appreciable reproducibility and steady preparation of single-layer MXene sheets, which clears the obstacles for research work in this direction.…”

Antifouling binary liquid-infused membranes for biological sample pretreatment

“…The separation processes involve a series of surface/interface issues and abide by size-sieving and solution/diffusion mechanisms, 1,2 which greatly depend on pore structures, wettabilities, surface charges, surface roughness, etc. 3–7 Nevertheless, the interaction between the membrane surfaces and the foulants should influence these membrane characteristics, leading to decreased membrane separation performance. 8–10…”