Janus smart materials with asymmetrical wettability for on-demand oil/water separation: a comprehensive review

Abstract

Increasingly growth in the complex industrial oil-containing wastewater have posed tremendous damage to ecological environment and human health. Materials with special wettability create a promising future for the purification of...

A robust superhydrophobic and superoleophilic SA-HKUST-1 membrane for efficient oil/water mixture separation

“…In recent years, inspired by bionics 18–20 researchers have discovered that some super wettable materials with surface micro–nano rough structures are making a splash in the field of oil–water separation, such as fabrics, 21,22 meshes, 23–25 foams, 26–28 sponges, 29,30 gels 31–33 and Janus smart materials based on the above materials. 34 These materials have been modified to achieve a significant increase in separation efficiency and to have emerging applications such as self-cleaning 35 and photocatalytic degradation of pollutants. 36,37 The membrane separation method has attracted huge attention and exploration from many scholars at home and abroad in the field of oil–water separation because of its advantages, such as simple equipment, easy operation, low energy consumption, environmental protection, and adaptability.…”

Hierarchical 0D CuO Wrapped by Petal-like 2D ZnO: A Strategic Approach of Superhydrophobic Melamine Sponge toward Wastewater Treatment

“…In recent years, frequent oil spill accidents have inflicted devastating disasters upon marine ecosystems. 1,2 The proliferation of pharmaceutical factories and the petroleum industry has exacerbated the issue, leading to significant challenges in sustaining ecosystems and impeding further economic development. 3,4 In response to this grim situation, the treatment of oily wastewater has garnered considerable attention.…”

“…In recent years, frequent oil spill accidents have inflicted devastating disasters upon marine ecosystems. , The proliferation of pharmaceutical factories and the petroleum industry has exacerbated the issue, leading to significant challenges in sustaining ecosystems and impeding further economic development. , In response to this grim situation, the treatment of oily wastewater has garnered considerable attention. , The development of strategic wastewater treatment technologies, including advanced oxidation, adsorption, photocatalytic degradation, biological treatment, and membrane filtration, has been driven by the urgency to address the escalating problem. , However, many of these technologies exhibit inherent drawbacks, such as poor hydrophobic stability, time-intensive processes, arduous energy utilization, mediocre performance, and the risk of secondary pollutants . Consequently, there is a growing interest in more practical methods for large-scale oily wastewater treatment, with a focus on the physical sorption of oil.…”

Recent progress of cotton fabric based on bio‐inspired modification for oil/water separation

“…The development of industry is too rapid to resist. As the demand for energy has increased, so have the accidents that threaten or even damage the ecological environment, such as offshore oil spills and organic wastewater discharge accidents 1–4 . The damage caused by these accidents to the environment, ecosystems, and human physical and mental health can't be ignored 5 .…”