Modulating metal-organic framework's (MOF) crystallinity and size using a polymer, in conjunction with a high surface area of layered double hydroxide, yields an effective strategy for concurrently enhancing the electrochemical and photocatalytic performance. In this study, we present the development of an optimized nanocomposite, denoted as 0.5PVP/ZIF-67, developed on AZ31 magnesium alloy, serving as an efficient and durable multifunctional coating. This novel strategy aims to enhance the overall performance of the porous coating through the integration of microarc oxidation (MAO), ZnFe LDH backbone, and ZIF-67 formation facilitated by the addition of polyvinylpyrrolidone (PVP), resulting in a three-dimensional, highly efficient, and multifunctional material. The incorporation of 0.5 g of PVP proved to be effective in the size modulation of ZIF-67, which formed a corrosion-resistant top layer, improving the total polarization resistance (Rp = 8.20 × 108). The dual functionality exhibited by this hybrid architecture positions it as a promising candidate for mitigating environmental pollution, degrading 97.93 % of Rhodamine B dye in 45 min. Moreover, the sample displayed exceptional degradation efficiency (96.17 %) after 5 cycles. This study illuminates the potential of nanocomposites as electrochemically stable and photocatalytically active materials, laying the foundation for the advancements of next-generation multifunctional frameworks.

中文翻译：

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聚乙烯吡咯烷酮增强 ZIF-67 和锌铁层状双氢氧化物在微弧氧化处理的 AZ31 镁合金上有效的多功能涂层


使用聚合物调节金属有机框架 （MOF） 的结晶度和尺寸，结合高表面积的层状双氢氧化物，产生了一种同时增强电化学和光催化性能的有效策略。在这项研究中，我们介绍了一种基于 AZ31 镁合金开发的优化纳米复合材料的开发，表示为 0.5PVP/ZIF-67，作为一种高效耐用的多功能涂层。这种新颖的策略旨在通过整合微弧氧化 （毛）、ZnFe LDH 主链和通过添加聚乙烯吡咯烷酮 （PVP） 促进 ZIF-67 形成来提高多孔涂层的整体性能，从而产生三维、高效和多功能的材料。掺入 0.5 g PVP 被证明可有效调节 ZIF-67 的尺寸，ZIF-67 形成耐腐蚀的顶层，提高总极化电阻 （Rp = 8.20 × 108）。这种混合架构所表现出的双重功能使其成为减轻环境污染的有前途的候选者，可在 45 分钟内降解 97.93% 的罗丹明 B 染料。此外，样品在 5 次循环后表现出出色的降解效率 （96.17 %）。这项研究阐明了纳米复合材料作为电化学稳定性和光催化活性材料的潜力，为下一代多功能框架的进步奠定了基础。