Highly and Stably Water Permeable Thin Film Nanocomposite Membranes Doped with MIL-101 Cr Nanoparticles for Reverse Osmosis ApplicationReportar como inadecuado


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


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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

Abstract 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





Autor: 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

Fuente: http://mdpi.com/



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