Efficient separation of oil/water with a simple and low-cost method is of great importance for the treatment of oily wastewater. In the current study, a facile one-step electrodeposition method was used to fabricate highly dense CeO₂ nanostructures on copper foam at a constant current density of 1.5 mA·cm^–2 for 20 min, which exhibited excellent superhydrophobicity and superlipophilicity after surface modification with n-dodecyl mercaptan (NDM). The electrodeposition current density and time were systematically investigated to uncover influencing factors of the growth process of CeO₂ nanostructures on the copper foam. The as-fabricated superhydrophobic foams could not only be used to efficiently separate oil/water mixtures with a separation efficiency greater than 97.4% but also presented robustness and high stability against 3.5 wt % NaCl solution and 600-grit sandpaper abrasion. Furthermore, the as-prepared sample still maintains a high separation efficiency at circa 97.5% after more than 25 times of recovery for kerosene/water mixture separation. In addition, the as-prepared three-dimensional cassette structure made of superhydrophobic copper foam could float freely on the water surface for fast in situ collection of oil from the water surface, indicating application potential in offshore oil spill treatment and cleanup.

中文翻译：

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用正十二烷基硫醇-CeO ₂纳米片改性的超疏水铜泡沫，可有效分离油/水和溢油

用一种简单且低成本的方法有效分离油/水对于处理含油废水非常重要。在目前的研究中，一种简便的一步电沉积方法被用于在1.5 mA·cm ^–2的恒定电流密度下在铜泡沫上制造高密度的CeO ₂纳米结构20分钟，在用表面改性后表现出优异的超疏水性和超亲脂性。正十二烷基硫醇（NDM）。系统地研究了电沉积电流密度和时间，以发现影响CeO ₂生长过程的因素。泡沫上的纳米结构。所制造的超疏水泡沫不仅可以有效地分离油/水混合物，分离效率大于97.4％，而且还具有针对3.5 wt％NaCl溶液和600砂砾砂纸的坚固性和高稳定性。此外，所制备的样品在煤油/水混合物的分离回收率超过25倍后仍保持约97.5％的高分离效率。此外，由超疏水性铜泡沫制成的三维立体盒式结构可以自由漂浮在水面上，以便从水面快速就地收集油，这表明其在海上溢油处理和清理中的应用潜力。