Smart Hierarchical Zeolitic Imidazolate Framework-Coated Stainless Steel Meshes with Switchable Wettability for Oil/Water Separation

被引：6
作者：
Liu, Yong [1 ]
Wu, Chao [1 ]
Zhang, Yao [1 ]
Zhao, Qi [2 ]
Zhang, Baoquan [1 ]
机构：
[1] Tianjin Univ, Sch Chem Engn & Technol, State Key Lab Chem Engn, Tianjin 300350, Peoples R China
[2] Univ Dundee, Sch Sci & Engn, Dundee DD1 4HN, Scotland
来源：
LANGMUIR | 2022年 / 38卷 / 27期
基金：
中国国家自然科学基金;
关键词：
NANOFIBROUS MEMBRANES; WATER; OIL; SUPERWETTABILITY; ARCHITECTURE;
D O I：
10.1021/acs.langmuir.2c00894
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Selective filtration based on superwetting materials has brought about widespread attention in the field of oil/water separation. In this study, a ZIF-L@8-coated stainless steel mesh (ZIF-L@8-coated SSM) was prepared via in situ growth of twodimensional leaf-shaped ZIF-L nanosheets on SSM, followed by heterogeneous epitaxial growth of ZIF-8 on a ZIF-L coating. The synthesized ZIF-L@8-coated SSM with a hierarchical micro/nanoscale structure exhibited outstanding switchable wettability between underwater superoleophobicity and underoil superhydrophobicity upon respective prewetting using water and oil without additional external stimuli. It possessed excellent separation performances and stabilities with respect to various types of oil/water mixtures. The switchable wettability mechanism was analyzed and elucidated in detail. The synthesized ZIF-L@8-coated SSM with switchable wettability in this study would have great potential in on-demand oil/water separation.
引用
收藏
页码：8374 / 8381
页数：8
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