Abstract Over the past few decades, oily water and soluble contaminants have increased from offshore oil accidents, oil-bearing wastewater emissions and oil exploration. This causes enormous damage to the ecosystem and environment. Developing superhydrophilic and superoleophobic materials has therefore received much interest due to their potential in oil/water separation. In this study, we fabricated a TiO2/Co3O4/graphene oxide composite membrane which possesses superamphilicity in air, underwater superoleophobicity, underoil superhydrophobicity as well as photocatalytic properties. A matrix of TiO2 nanocluster-based stainless steel mesh (TiO2 SSM) possesses benign superwetting behavior and good flexibility. A heterojunction of the TiO2/Co3O4/graphene oxide composite is coated onto the TiO2 SSM via vacuum deposition. The underwater oil contact angle and underoil water contact angle of the resulting membrane are both greater than 150°. The resulting film can segregate various oil/water emulsions with efficiencies of >99.5%, and provides favorable photodegradation efficiency of Congo red under simulated solar irradiation. The membrane exhibits excellent reusability after 10 consecutive cycles, and good physical and chemical stability. The membrane hence possesses potential in sewage and effluent disposal.

中文翻译：

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用于油/水乳液分离和有机染料降解的超两亲和水下超疏油膜

摘要 在过去的几十年中，海上石油事故、含油废水排放和石油勘探导致含油水和可溶性污染物增加。这对生态系统和环境造成巨大破坏。因此，由于其在油/水分离方面的潜力，开发超亲水和超疏油材料受到了广泛关注。在这项研究中，我们制造了一种 TiO2/Co3O4/氧化石墨烯复合膜，它具有空气中的超亲性、水下的超疏油性、油底下的超疏水性以及光催化性能。基于 TiO2 纳米团簇的不锈钢网（TiO2 SSM）基体具有良性的超润湿行为和良好的柔韧性。TiO2/Co3O4/氧化石墨烯复合材料的异质结通过真空沉积涂覆在 TiO2 SSM 上。所得膜的水下油接触角和油下水接触角均大于150°。所得薄膜能够以>99.5%的效率分离各种油/水乳液，并在模拟太阳辐射下提供良好的刚果红光降解效率。该膜在连续 10 次循环后表现出优异的重复使用性和良好的物理和化学稳定性。因此，该膜具有处理污水和废水的潜力。和良好的物理和化学稳定性。因此，该膜具有处理污水和废水的潜力。和良好的物理和化学稳定性。因此，该膜具有处理污水和废水的潜力。