Free-standing and flexible Cu@CuO nanowires (NWs) mesh as an easily recycled Fenton-like catalyst is developed for the first time. Dense CuO nanowire arrays were uniformly grown on a copper mesh surface simply by wet etching accompanied with thermal dehydration. These dense CuO NWs provide a large specific area and therefore guarantee excellent catalytic performance toward the degradation of rhodamine B (RhB). With a k-value of 0.23 min⁻¹, such a Cu@CuO NWs mesh is able to degrade 100% RhB in only 16 min. This Fenton-like catalyst is also appropriate for degrading other organic dyes, including crystal violet, methylene blue, and rhodamine 6G. Unlike the conventional Fenton catalyst implemented at a pH value around 3, the Cu@CuO NWs mesh could adapt to a wide pH range from 2.1 to 12.0. More intriguingly, the Cu@CuO NWs mesh with excellent flexibility could be easily recycled after catalysis, which is a significant advance compared to the previously reported Fenton catalysts in the form of powders or nanoparticles. In addition, the recycling performance of this Cu@CuO NWs mesh was also assessed. On the basis of electron spin resonance (ESR) results, O²⁻ rather than OH is the main active species for the dye degradation by the Cu@CuO NWs mesh. With a marvelous combination of excellent flexibility, wide pH adaptation, and high efficiency, this easily recycled three dimensional Cu@CuO NWs architecture can afford new ideas for the Fenton chemistry.

作为易于回收的类Fenton催化剂，首次开发了独立的，灵活的Cu @ CuO纳米线（NWs）筛网。简单地通过湿蚀刻并伴随热脱水，在铜网表面上均匀地生长致密的CuO纳米线阵列。这些致密的CuO NW提供了较大的比表面积，因此可确保出色的催化性能，从而可避免罗丹明B（RhB）的降解。以0.23 min ^-1的k值，这样的Cu @ CuO NWs网格仅在16分钟内即可降解100％RhB。这种Fenton类催化剂也适用于降解其他有机染料，包括结晶紫，亚甲基蓝和若丹明6G。不像传统的芬顿如果在pH值约为3的条件下使用该催化剂，则Cu @ CuO NWs筛网可适应2.1至12.0的宽pH范围。更有趣的是，具有优异柔韧性的Cu @ CuO NWs筛网在催化后可以轻松回收，这与以前报道的粉状或纳米颗粒形式的Fenton催化剂相比是一个重大进步。此外，还评估了这种Cu @ CuO NWs筛网的回收性能。根据电子自旋共振（ESR）结果， O²⁻而不是OH是通过Cu @ CuO NWs网格降解染料的主要活性物质。出色的柔韧性，广泛的pH适应性和高效率的完美结合，这种易于回收利用的三维Cu @ CuO NW结构可以为Fenton化学提供新的思路。