Improving Water-Treatment Performance of Zirconium Metal-Organic Framework Membranes by Postsynthetic Defect Healing

Xuerui Wang; Linzhi Zhai; Yuxiang Wang; Ruitong Li; Xuehong Gu; Yi Di Yuan; Yuhong Qian; Zhigang Hu; Dan Zhao

doi:10.1021/acsami.7b12750

Improving Water-Treatment Performance of Zirconium Metal-Organic Framework Membranes by Postsynthetic Defect Healing

Xuerui Wang, Linzhi Zhai, Yuxiang Wang, Ruitong Li, Xuehong Gu, Yi Di Yuan, Yuhong Qian, Zhigang Hu, Dan Zhao

COLLEGE OF CHEMICAL ENGINEERING

National University of Singapore

Research output: Contribution to journal › Article › peer-review

98 Scopus citations

Abstract

Microporous metal-organic frameworks (MOFs) as building materials for molecular sieving membranes offer unique opportunities to tuning the pore size and chemical property. The recently reported polycrystalline Zr-MOF membranes have greatly expanded their applications from gas separation to water treatment. However, Zr-MOFs are notoriously known for their intrinsic defects caused by ligand/cluster missing, which may greatly affect the molecular sieving property of Zr-MOF membranes. Herein, we present the mitigation of ligand-missing defects in polycrystalline UiO-66(Zr)-(OH)₂ membranes by postsynthetic defect healing (PSDH), which can help in increasing the membranes' Na⁺ rejection rate by 74.9%. Intriguingly, the membranes also exhibit excellent hydrothermal stability in aqueous solutions (>600 h). Our study proves the feasibility of PSDH in improving the performance of polycrystalline Zr-MOF membranes for water-treatment applications.

Original language	English
Pages (from-to)	37848-37855
Number of pages	8
Journal	ACS Applied Materials and Interfaces
Volume	9
Issue number	43
DOIs	https://doi.org/10.1021/acsami.7b12750
State	Published - 1 Nov 2017

Keywords

UiO-66
hollow fibers
metal-organic frameworks
polycrystalline membranes
postsynthetic defect healing
water treatment

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10.1021/acsami.7b12750

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title = "Improving Water-Treatment Performance of Zirconium Metal-Organic Framework Membranes by Postsynthetic Defect Healing",

abstract = "Microporous metal-organic frameworks (MOFs) as building materials for molecular sieving membranes offer unique opportunities to tuning the pore size and chemical property. The recently reported polycrystalline Zr-MOF membranes have greatly expanded their applications from gas separation to water treatment. However, Zr-MOFs are notoriously known for their intrinsic defects caused by ligand/cluster missing, which may greatly affect the molecular sieving property of Zr-MOF membranes. Herein, we present the mitigation of ligand-missing defects in polycrystalline UiO-66(Zr)-(OH)2 membranes by postsynthetic defect healing (PSDH), which can help in increasing the membranes' Na+ rejection rate by 74.9%. Intriguingly, the membranes also exhibit excellent hydrothermal stability in aqueous solutions (>600 h). Our study proves the feasibility of PSDH in improving the performance of polycrystalline Zr-MOF membranes for water-treatment applications.",

keywords = "UiO-66, hollow fibers, metal-organic frameworks, polycrystalline membranes, postsynthetic defect healing, water treatment",

author = "Xuerui Wang and Linzhi Zhai and Yuxiang Wang and Ruitong Li and Xuehong Gu and Yuan, {Yi Di} and Yuhong Qian and Zhigang Hu and Dan Zhao",

note = "Publisher Copyright: {\textcopyright} 2017 American Chemical Society.",

year = "2017",

month = nov,

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doi = "10.1021/acsami.7b12750",

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T1 - Improving Water-Treatment Performance of Zirconium Metal-Organic Framework Membranes by Postsynthetic Defect Healing

AU - Wang, Xuerui

AU - Zhai, Linzhi

AU - Wang, Yuxiang

AU - Li, Ruitong

AU - Gu, Xuehong

AU - Yuan, Yi Di

AU - Qian, Yuhong

AU - Hu, Zhigang

AU - Zhao, Dan

PY - 2017/11/1

Y1 - 2017/11/1

N2 - Microporous metal-organic frameworks (MOFs) as building materials for molecular sieving membranes offer unique opportunities to tuning the pore size and chemical property. The recently reported polycrystalline Zr-MOF membranes have greatly expanded their applications from gas separation to water treatment. However, Zr-MOFs are notoriously known for their intrinsic defects caused by ligand/cluster missing, which may greatly affect the molecular sieving property of Zr-MOF membranes. Herein, we present the mitigation of ligand-missing defects in polycrystalline UiO-66(Zr)-(OH)2 membranes by postsynthetic defect healing (PSDH), which can help in increasing the membranes' Na+ rejection rate by 74.9%. Intriguingly, the membranes also exhibit excellent hydrothermal stability in aqueous solutions (>600 h). Our study proves the feasibility of PSDH in improving the performance of polycrystalline Zr-MOF membranes for water-treatment applications.

AB - Microporous metal-organic frameworks (MOFs) as building materials for molecular sieving membranes offer unique opportunities to tuning the pore size and chemical property. The recently reported polycrystalline Zr-MOF membranes have greatly expanded their applications from gas separation to water treatment. However, Zr-MOFs are notoriously known for their intrinsic defects caused by ligand/cluster missing, which may greatly affect the molecular sieving property of Zr-MOF membranes. Herein, we present the mitigation of ligand-missing defects in polycrystalline UiO-66(Zr)-(OH)2 membranes by postsynthetic defect healing (PSDH), which can help in increasing the membranes' Na+ rejection rate by 74.9%. Intriguingly, the membranes also exhibit excellent hydrothermal stability in aqueous solutions (>600 h). Our study proves the feasibility of PSDH in improving the performance of polycrystalline Zr-MOF membranes for water-treatment applications.

KW - UiO-66

KW - hollow fibers

KW - metal-organic frameworks

KW - polycrystalline membranes

KW - postsynthetic defect healing

KW - water treatment

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U2 - 10.1021/acsami.7b12750

DO - 10.1021/acsami.7b12750

M3 - 文章

C2 - 28994577

AN - SCOPUS:85032696775

SN - 1944-8244

VL - 9

SP - 37848

EP - 37855

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 43

ER -

Improving Water-Treatment Performance of Zirconium Metal-Organic Framework Membranes by Postsynthetic Defect Healing

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Keywords

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