Constructing CuO-based nanofibrous membranes with remarkable mechanical performance, controllable nanostructures, and outstanding catalytic oxidation activity would be conducive to decomposing organic contaminants in wastewater through advanced oxidation processes; however, there remains a huge shortfall of such ceramic membranes that they are usually fragile with poor deformability. Herein, a universal approach was proposed for fabricating flexible CuO nanoparticles-anchored ZrO nanofibrous membranes (CZNMs), that is, through the combination of successive ionic layer adsorption and reaction (SILAR) assembly and the follow-up thermal oxidation processes. Notably, the developed preparation method exhibited strong expansibility, which could be extended to the synthesis of other flexible metal oxides/ceramic nanofibrous composites, such as ZnO/ZrO, CdO/ZrO, and MnO/ZrO. Profiting from the integrated advantages of superior catalytic reactivity, uniform nanostructures distribution, and excellent mechanical properties, the resultant CZNMs displayed a prominent degradation efficiency of 92.4% within 50 min towards tetracycline hydrochloride under the activation of peroxymonosulfate (PMS). Furthermore, the stable hierarchical structures and robust mechanical performance endow the as-synthesized membranes with extraordinary reusability and easy recycling. The successful preparation of such ceramic-based nanofibrous membranes with superior flexibility and high-efficient catalytic performance might provide some reference to develop other synergetic membranous catalysts for wastewater treatment.

中文翻译：

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用于催化氧化四环素的柔性 CuO 纳米粒子锚定 ZrO2 纳米纤维膜的一般合成

构建具有优异机械性能、可控纳米结构和出色催化氧化活性的CuO基纳米纤维膜，将有利于通过高级氧化工艺分解废水中的有机污染物；然而，这种陶瓷膜仍然存在巨大的缺陷，即它们通常易碎、变形能力差。在此，提出了一种制备柔性 CuO 纳米颗粒锚定 ZrO 纳米纤维膜（CZNM）的通用方法，即通过连续离子层吸附和反应（SILAR）组装和后续热氧化过程的结合。值得注意的是，所开发的制备方法具有很强的可扩展性，可以扩展到其他柔性金属氧化物/陶瓷纳米纤维复合材料的合成，例如ZnO/ZrO、CdO/ZrO和MnO/ZrO。得益于优异的催化反应活性、均匀的纳米结构分布和优异的机械性能的综合优势，所得的CZNM在过一硫酸盐（PMS）的活化下对盐酸四环素在50分钟内表现出92.4%的显着降解效率。此外，稳定的分层结构和强大的机械性能赋予合成膜非凡的可重复使用性和易于回收利用。这种具有优异柔韧性和高效催化性能的陶瓷基纳米纤维膜的成功制备可能为开发其他用于废水处理的协同膜催化剂提供一定的参考。