One-step synthesis of a robust and anti-oil-fouling biomimetic cactus-like hierarchical architecture for highly efficient oil/water separation,Environmental Science: Nano

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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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