The simultaneous realization of multifunctionalization and high efficiency of seawater-uranium extraction materials are essential; however, this is extremely challenging. In this work, a novel multifunctional hybrid nanofiber film (NF) with excellent photothermal conversion properties based on ethylene vinyl alcohol copolymer (EVOH), MXene and amidoxime (AO), named EVOH/MXene-g-AO, is firstly prepared by combining electrospinning with radiation technique. The EVOH/MXene-g-AO film exhibits highly efficient photothermal conversion properties, with a fast water evaporation rate (1.67 kg m-2h−1) under 1 solar irradiation. Moreover, this property makes the EVOH/MXene-g-AO film conducive to efficient uranium extraction under sunlight, and enables the adsorption capacity of the EVOH/MXene-g-AO film in simulated seawater to be 13.06 mg g−1 in 60 days, which is about 1.5 times higher compared to the light-free environment. In addition, after eight adsorption-regeneration cycles, the reuse rate of EVOH/MXene-g-AO is as high as 87.4 %. More importantly, the EVOH/MXene-g-AO film exhibits good antibacterial ability, thus the well-designed film has a long service life in practical applications. Finally, EVOH/MXene-g-AO film is successfully applied for the efficient uranium extraction from seawater (UES) and seawater of desalination. This work provides a new strategy for marine uranium extraction and freshwater resource exploitation.

中文翻译：

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辐射合成偕胺肟功能性EVOH/MXene纳米纤维膜用于海水提铀和海水淡化


同时实现海水提铀材料的多功能化和高效化至关重要；然而，这是极具挑战性的。在这项工作中，首先通过结合静电纺丝制备了一种基于乙烯乙烯醇共聚物（EVOH）、MXene和偕胺肟（AO）的具有优异光热转换性能的新型多功能杂化纳米纤维薄膜（NF），命名为EVOH/MXene-g-AO。用辐射技术。 EVOH/MXene-g-AO薄膜表现出高效的光热转换性能，在1次太阳照射下具有快速的水蒸发速率（1.67 kg m-2h−1）。此外，这一特性使得EVOH/MXene-g-AO薄膜有利于在阳光下高效提取铀，并使EVOH/MXene-g-AO薄膜在模拟海水中的吸附能力在60天内达到13.06 mg g−1 ，比无光环境高约1.5倍。此外，经过8次吸附-再生循环后，EVOH/MXene-g-AO的重复利用率高达87.4%。更重要的是，EVOH/MXene-g-AO薄膜表现出良好的抗菌能力，因此精心设计的薄膜在实际应用中具有较长的使用寿命。最后，EVOH/MXene-g-AO薄膜成功应用于海水高效提铀（UES）和海水淡化。这项工作为海洋铀提取和淡水资源开发提供了新策略。