Underwater superoleophobic TiO2/porous metal matrix with self-cleaning properties for high performance oil/water separation

IF 2.5 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Applied Physics A Pub Date : 2024-11-29 DOI:10.1007/s00339-024-08094-2

Qian Chai, Lei E, Yajing Li, Yuedan Zhang, Dan Zhao, Yuxin Lv, Yaoyu Zhao

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Abstract

Porous metal materials with special surface wettability are widely used in oily wastewater treatment. To realize efficient oil/water separation of porous metal material, layered spherical TiO₂ and “woodchip” NiO micro-nano structures were constructed on the surface of nickel foam (NF) matrix by hydrothermal method, which endowed the porous metal material with superhydrophilic and underwater superoleophobic (SHI/USOB) characteristics. Moreover, the separation efficiency of various oil/water mixtures remained above 98%, and the water flux exceeded 2.66 × 10⁵ L m⁻² h⁻¹. Meanwhile, the uniformly supported TiO₂ nanoparticles showed excellent self-cleaning performance, and the oil droplets remaining on the sample surface could be effectively degraded under ultraviolet irradiation for 8 h. TiO₂/NF has a lot of potential because of its three-dimensional micro-nano porous structure, self-cleaning capabilities and environmental friendliness.

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具有自清洁特性的水下超疏水 TiO2/多孔金属基质，用于实现高性能油水分离

具有特殊表面润湿性的多孔金属材料被广泛应用于含油废水处理。为实现多孔金属材料的高效油水分离，采用水热法在泡沫镍（NF）基体表面构建了层状球形TiO2和 "木片 "状NiO微纳结构，使多孔金属材料具有超亲水和水下超疏水（SHI/USOB）特性。此外，各种油水混合物的分离效率保持在 98% 以上，水通量超过 2.66 × 105 L m-2 h-1。同时，均匀支撑的 TiO2 纳米粒子表现出优异的自清洁性能，在紫外线照射 8 小时后，残留在样品表面的油滴可被有效降解。

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来源期刊

Applied Physics A 工程技术-材料科学：综合

CiteScore

4.80

自引率

7.40%

发文量

964

审稿时长

38 days

期刊介绍： Applied Physics A publishes experimental and theoretical investigations in applied physics as regular articles, rapid communications, and invited papers. The distinguished 30-member Board of Editors reflects the interdisciplinary approach of the journal and ensures the highest quality of peer review.