期刊
JOURNAL OF MEMBRANE SCIENCE
卷 624, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.memsci.2021.119101
关键词
Metal-phenolic network; Metal-organic framework; Zinc source; Layer-by-layer self-assembly; Desalination
资金
- Natural Science Foundation of Zhejiang Province [LQ19B060008, LQ19B030008]
- Science and Technology Planning Project of Jinhua city [2019-4-164]
- National Natural Science Foundation of China [51978628]
- Zhejiang Provincial Ten Thousand Talent Program [ZJWR0302055]
The study successfully synthesized a ZIF-8 membrane by using a metal-phenolic network top layer on a polyethersulfone substrate. The optimized ZIF-8 membrane showed high pure water permeance and rejection rates, demonstrating potential applications in nanofiltration membrane separation.
A continuous and ultra-thin metal-phenolic network top layer on a polyethersulfone substrate surface was used as metal precursor for a metal-organic framework (MOF) membrane synthesis. A plant polyphenol tannic acid (TA) and Zn2+ based network top layer prepared by a layer-by-layer (LBL) self-assembly process was immersed into a 2-methylimidazole aqueous solution, and then a ZIF-8 top layer was facilely formed due to the partial self conversion of TA-Zn2+ network to ZIF-8. The LBL process provides sufficient controllability of preparing a continuous and ultra-thin ZIF-8 top layer, which are crucial factors for nanofiltration membrane separation performance. The optimized ZIF-8 membrane exhibited a pure water permeance (PWP) of 5.1 L m(-2) h(-1) bar(-1), a 55.2% NaCl rejection and a 93.6% Na2SO4 rejection. This is one of the few MOF membranes that possesses a divalent inorganic salt rejection higher than 90%. The novel zinc source of ZIF-8 synthesis disclosed in this study can provide a new incentive to not only MOF membrane preparation but also engineering MOFs towards a wide energy and environmental applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据