材料科学
膜
光催化
化学工程
生物污染
纳米棒
乳状液
沸石咪唑盐骨架
咪唑酯
过滤(数学)
多孔性
聚偏氟乙烯
锌
饮用水净化
纳米技术
聚合物
金属有机骨架
有机化学
吸附
复合材料
催化作用
数学
统计
遗传学
生物
冶金
化学
工程类
作者
Kai Wang,Huaqiang He,Baibing Wei,Tian C. Zhang,Haiqing Chang,Yingqi Li,Xiaobao Tian,Yubo Fan,Ying Liang,Shaojun Yuan
标识
DOI:10.1021/acsami.1c15024
摘要
Surfaces with unusual under-liquid dual superlyophobicity are attractive on account of their widespread applications, but their development remains difficult due to thermodynamic contradiction. Additionally, these surfaces may suffer from limited antifouling ability, which has restricted their practical applications. Herein, we report a successful in situ growth of a hybrid zeolitic imidazolate framework-8 and zinc oxide nanorod on a porous poly(vinylidene fluoride) membrane (ZIF-8@ZnO-PPVDF) and its application as a self-cleaning switchable barrier material in rapid filtration for emulsified oily wastewater. The novel ZIF-8@ZnO-PPVDF exhibits superior mechanical strength, reversible under-liquid dual superlyophobicity, photocatalytic self-cleaning property, and an effective alternate separation capacity toward both oil-in-water (O/W) and water-in-oil (W/O) emulsions with ultrahigh fluxes and efficiencies (>99%). By simply using a "bait-hook-eliminate" method to separate the O/W emulsions containing soluble organic pollutants, we demonstrate that the ZIF-8@ZnO-PPVDF can achieve stable separation fluxes over 600 L m-2 h-1 with high efficiencies and be completely/nondestructively regenerated by visible-light irradiation after each cycle. This study would demonstrate a new approach to prepare an under-liquid dual superlyophobic revivable membrane for various applications.
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