Facile fabrication of underwater superoleophobic SiO2 coated meshes for separation of polluted oils from corrosive and hot water
Facile fabrication of underwater superoleophobic SiO2 coated meshes for separation of polluted oils from corrosive and hot water
复制标题
轻松制造水下超疏油 SiO2 涂层网，用于从腐蚀性和热水中分离污染油
DOI：
10.1016/j.seppur.2016.05.053
复制
发表时间：
2016-08-10
影响因子：
8.6
通讯作者：
Zha, Fei
中科院分区：
文献类型：
--
作者：
Li, Jian;Li, Dianming;Zha, Fei
由于溢油事故频发和工业含油废水不断增加，油水分离成为一项具有挑战性的全球性任务。在这里，我们介绍了一种简便的一步喷涂方法来制备协同超亲水-水下超疏油 SiO2 网格，用于从水中去除油。然后使用水下超疏油 SiO2 网格来研究重力驱动的一系列油与水的分离，其中只允许水渗透通过网格，而油在网格表面上被排斥。使用涂层网对煤油/水混合物的分离效率高达 99.0%。此外，涂层网经过50次分离循环后仍保持水下超疏油性能，分离效率大于98.0%。此外，SiO2涂层网在一系列恶劣条件下表现出优异的环境稳定性，用于从强酸性、盐水溶液甚至热水等腐蚀性和活性水中分离污染油，分离效率超过98.0%。因此，这种协同超亲水-水下超疏油SiO2涂层网可能是水体修复的潜在候选者，特别是含油海水。 (C) 2016 Elsevier B.V. 保留所有权利。
Separation of oils from water becomes a challenging global task due to the frequent oil spill accidents and expanding industrial oily waste water. Here, we introduced a facile one-step spraying coating method to prepare synergistic superhydrophilic-underwater superoleophobic SiO2 meshes for removal of oils from water. The underwater superoleophobic SiO2 meshes were then used to investigate gravity driven separation of a series of oils from water, where only the water was allowed to permeate through the mesh while the oils were repelled on the mesh surface. Separation efficiency up to 99.0% could be achieved with the coated meshes for the kerosene/water mixture. In addition, the coated meshes still retained underwater superoleophobic properties after 50 separation cycles with the separation efficiency larger than 98.0%. Moreover, the SiO2 coated meshes showed excellent environmental stability under a series of harsh conditions, which were utilized for separation of polluted oils from corrosive and active water, such as strong acidic, salt aqueous solutions and even hot water with the separation efficiency above 98.0%. Thus, such synergistic superhydrophilic-underwater superoleophobic SiO2 coated meshes might be a potential candidate for water body restoration, especially oily seawater. (C) 2016 Elsevier B.V. All rights reserved.