In this work, we report the fabrication of superhydrophilic-underwater superoleophobic ZnO/WO₃.H₂O coated stainless steel mesh for the effective oil-water separation. X-ray diffraction studies confirm the occurrence of hexagonal wurtzite and orthorhombic phase of ZnO and WO₃.H₂O respectively in the ZnO/WO₃.H₂O coated mesh. The superhydrophilic-underwater superoleophobic nature of ZnO/WO₃.H₂O covered mesh is attributed to the innate hydrophilicity and surface roughness of WO₃.H₂O, which is again enhanced by the inclusion of ZnO. The oil-water separation efficiency of ZnO/WO₃.H₂O covered stainless steel mesh was over 98% for various oil-water mixtures. The coated mesh maintains high efficiency of separation even after 10 cycles of operation. Moreover, the as-deposited meshes demonstrated good separation ability for the emulsified oil droplets larger than its pore size. The excellent abrasion-resistant ability of ZnO/WO₃.H₂O coated mesh indicate its excellent mechanical stability. In addition, the high intrusion pressure of ZnO/WO₃.H₂O coated mesh favors the separation of oil-water mixture in large volumes. Furthermore, the photocatalytic activity of the coated mesh could degrade the organic pollutants present in the oil-water mixture. The proposed novel strategy in designing a multifunctional surface paves the way for the treatment of oleaginous water for environmental remediation.

在这项工作中，我们报告了超亲水-水下超疏油 ZnO/WO ₃ .H ₂ O 涂层不锈钢网的制备，用于有效的油水分离。X 射线衍射研究证实，在 ZnO/WO ₃ .H ₂ O 涂层网中分别出现六方纤锌矿和 ZnO 和 WO ₃ .H _{2 O 斜方晶相。ZnO/WO 3} .H ₂ O 覆盖网的超亲水-水下超疏油性质归因于WO ₃ .H ₂ O 的先天亲水性和表面粗糙度，而这又因包含ZnO 而增强。ZnO/WO的油水分离效率对于各种油水混合物，₃ .H _{2 O 覆盖的不锈钢网超过 98%。}即使在 10 个操作周期后，涂层网仍能保持高分离效率。此外，沉积后的网格对大于其孔径的乳化油滴表现出良好的分离能力。_{ZnO/WO 3} .H ₂ O 涂层网的优异耐磨能力表明其优异的机械稳定性。此外，ZnO/WO ₃ .H _{2的高侵入压力}O 涂层网有利于分离大量油水混合物。此外，涂层网的光催化活性可以降解油水混合物中存在的有机污染物。提出的设计多功能表面的新策略为处理含油水以进行环境修复铺平了道路。