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Open AccessArticle

Highly and Stably Water Permeable Thin Film Nanocomposite Membranes Doped with MIL-101 (Cr) Nanoparticles for Reverse Osmosis Application

by Yuan Xu 1,2, Xueli Gao 1,2,*, Xiaojuan Wang 1,2, Qun Wang 1,2, Zhiyong Ji 3, Xinyan Wang 4, Tao Wu 5 and Congjie Gao 1,2
1
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China
2
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
3
School of Marine Science and Engineering, Hebei University of Technology, Tianjin 300130, China
4
Shandong Zhaojin Motian Co. Ltd., Zhaoyuan 265400, China
5
Ocean College, Zhejiang University of Technology, Hangzhou 310000, China
*
Author to whom correspondence should be addressed.
Academic Editor: George Zhao
Materials 2016, 9(11), 870; https://doi.org/10.3390/ma9110870
Received: 29 August 2016 / Revised: 26 September 2016 / Accepted: 11 October 2016 / Published: 26 October 2016
(This article belongs to the Special Issue Porous Materials for Water Technology)
A hydrophilic, hydrostable porous metal organic framework (MOF) material-MIL-101 (Cr) was successfully doped into the dense selective polyamide (PA) layer on the polysulfone (PS) ultrafiltration (UF) support to prepare a new thin film nanocomposite (TFN) membrane for water desalination. The TFN-MIL-101 (Cr) membranes were characterized by SEM, AFM, XPS, wettability measurement and reverse osmosis (RO) test. The porous structures of MIL-101 (Cr) can establish direct water channels in the dense selective PA layer for water molecules to transport through quickly, leading to the increasing water permeance of membranes. With good compatibility between MIL-101 (Cr) nanoparticles and the PA layer, the lab made TFN-MIL-101 (Cr) membranes integrated tightly and showed a high NaCl salt rejection. MIL-101 (Cr) nanoparticles increased water permeance to 2.2 L/m2·h·bar at 0.05 w/v % concentration, 44% higher than the undoped PA membranes; meanwhile, the NaCl rejection remained higher than 99%. This study experimentally verified the potential use of MIL-101 (Cr) in advanced TFN RO membranes, which can be used in the diversified water purification field. View Full-Text
Keywords: metal organic frameworks; MIL-101 (Cr); thin film nanocomposite; reverse osmosis; desalination; interfacial polymerization metal organic frameworks; MIL-101 (Cr); thin film nanocomposite; reverse osmosis; desalination; interfacial polymerization
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Xu, Y.; Gao, X.; Wang, X.; Wang, Q.; Ji, Z.; Wang, X.; Wu, T.; Gao, C. Highly and Stably Water Permeable Thin Film Nanocomposite Membranes Doped with MIL-101 (Cr) Nanoparticles for Reverse Osmosis Application. Materials 2016, 9, 870.

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