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One-step synthesis of a robust and anti-oil-fouling biomimetic cactus-like hierarchical architecture for highly efficient oil/water separation
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2020/01/27 , DOI: 10.1039/c9en01140d
Lei Zhu 1, 2, 3, 4, 5 , Hui Li 1, 2, 3, 4, 5 , Yingying Yin 1, 2, 3, 4, 5 , Zhaozhen Cui 1, 2, 3, 4, 5 , Chao Ma 3, 4, 5, 6 , Xiaofang Li 1, 2, 3, 4, 5 , Qingzhong Xue 1, 2, 3, 4, 5
Affiliation  

It is of great significance to develop novel superhydrophilic/underwater superoleophobic materials using a facile and simple method for efficiently separating oily wastewater. In this work, a completely inorganic hierarchical structure made up of a Co and Ni double hydroxide (CoNi–OH) was successfully prepared using a simple one-step in situ method. Combining the unique hierarchical architecture with strong water locking capability, a biomimetic cactus-like hierarchical CoNi–OH-4 coated stainless steel mesh (CoNi–OH-4/SSM) exhibits excellent superhydrophilicity/underwater superoleophobicity and superior anti-oil-fouling capability for high-efficiency oil/water separation with an ultrahigh flux (>37 227 L m−2 h−1) and excellent oil rejection ratio of >99.95%. Continuous lubricating oil/water separation tests demonstrated that CoNi–OH-4/SSM shows high separation capability and excellent recycling over 20 cycles with a stable flux of 37 000 L m−2 h−1 and oil rejection ratio of >99.90%. Furthermore, CoNi–OH-4/SSM exhibits outstanding mechanical, chemical, and long-term stability. Biomimetic CoNi–OH-4/SSM, made using a simple preparation method, has superior anti-oil-fouling properties, excellent oil/water separation performance, and outstanding mechanical and chemical stabilities, revealing its great potential for practical applications in oil/water separation.

中文翻译:

一步一步合成健壮且防污垢的仿生仙人掌状分层体系,可实现高效的油/水分离

利用一种简便,有效分离含油废水的方法,开发新型的超亲水/水下超疏油材料具有重要意义。在这项工作中,使用简单的一步原位法成功地制备了由Co和Ni双氢氧化物(CoNi-OH)组成的完全无机的分层结构。仿生仙人掌般的分层CoNi–OH-4涂层不锈钢网(CoNi–OH-4 / SSM)结合独特的分层结构和强大的防水功能,显示出优异的超亲水性/水下超疏油性和出色的防污垢能力超高通量(> 37 227 L m -2 h -1的高效油/水分离)的优良拒油率,> 99.95%。连续的润滑油/水分离测试表明,CoNi-OH-4 / SSM在20个循环中显示出较高的分离能力和出色的循环利用性,其稳定通量为37000 L m -2 h -1,排油率大于99.90%。此外,CoNi-OH-4 / SSM具有出色的机械,化学和长期稳定性。仿生CoNi–OH-4 / SSM采用简单的制备方法制成,具有卓越的防污垢性能,出色的油/水分离性能以及出色的机械和化学稳定性,显示出在油/水中实际应用的巨大潜力分离。
更新日期:2020-03-21
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