Developing high-performance, low-cost and large-scale absorbent materials is crucial for the treatment of water pollution caused by pollutants leakage and emission. Herein, superelastic and superhydrophobic thermoplastic polymeric nano brous aerogels (NFAs) were created for removal pollutants from water by using a facile and effective method. Poly(vinyl alcohol-co-ethylene) (EVOH) nano bers fabricated by mass-production techniques were used to construct three-dimensional NFAs through combing freezedrying process and cross-linking treatment. The optimal parameters for creating EVOH NFAs with good formability and resilience, including composition and ratio of dispersion, dosage of cross-linking agent were obtained through experiments. EVOH nano bers bonded with each other by glutaraldehyde under acidic conditions to from brous network structure in EVOH NFAs. The silane-coated EVOH NFAs were prepared through further modi cation with vapor-phase methyltrichlorosilane. The deposition of siloxane improved mechanical strength and decreased plastic deformation after 500 cyclic compressions. An asperate brous and granular siloxane coating was deposited on the surface of EVOH NFAs. The surface water contact angle increased from 104.4 ± 4.0° to 152.7 ± 1.9°, wettability of NFAs transitioned to being superhydrophobic. Silane-coated EVOH NFAs exhibited superior absorption capacity (40-92 g/g) for a variety of organic pollutants.The organic pollutants would be collected and the sorbents could be reused after distillation or squeezing. A successful scale-up of such materials open up a new insight into design polymeric aerogels in low-cost and large-scale with substantial industrial water puri cation applications.
Low‐dimensional high‐entropy alloy (HEA) nanomaterials are widely employed as electrocatalysts for energy conversion reactions, due to their inherent advantages, including high electron mobility, rich catalytically active site, optimal electronic structure. Moreover, the high‐entropy, lattice distortion, and sluggish diffusion effects also enable them to be promising electrocatalysts. A thorough understanding on the structure‐activity relationships of low‐dimensional HEA catalyst play a huge role in the future pursuit of more efficient electrocatalysts. In this review, we summarize the recent progress of low‐dimensional HEA nanomaterials for efficient catalytic energy conversion. By systematically discussing the fundamentals of HEA and properties of low‐dimensional nanostructures, we highlight the advantages of low‐dimensional HEAs. Subsequently, we also present many low‐dimensional HEA catalysts for electrocatalytic reactions, aiming to gain a better understanding on the structure‐activity relationship. Finally, a series of upcoming challenges and issues are also thoroughly proposed as well as their future directions.
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