Preparation and properties of MOF-199@GO modified PVDF charged composite nanofiltration membrane

被引：0
作者：
Ao D. [1 ,2 ]
Zhang H. [2 ]
Lyu M. [2 ]
Wang H. [1 ,2 ]
Chang N. [1 ,3 ]
机构：
[1] State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin
[2] School of Environmental Science and Engineering, Tiangong University, Tianjin
[3] School of Chemistry and Chemical Engineering, Tiangong University, Tianjin
来源：
Huagong Xuebao/CIESC Journal | 2020年 / 71卷
关键词：
Composites; Desalination; Graphene oxide; Membranes; MOF-199; PVDF;
D O I：
10.11949/0438-1157.20200277
中图分类号：
学科分类号：
摘要：
As novel functional materials, metal-organic framework (MOF) and graphene oxide (GO) have received great attentions in recent years. In this work, MOF@GO nanocomposite (MOF-199@GO) is prepared by an in-situ growth method. A novel and highly efficient nanofiltration (NF) membrane can be facilely fabricated via surface decoration of MOF-199@GO onto poly(vinylidene fluoride) (PVDF) substrate before interfacial polymerization of m-phenylenediamine (MPD) and trimesoyl chloride (TMC) in order to overcome the hydrophobicity of PVDF membrane. The structure and morphology of MOF-199@GO and MOF-199@GO modified PVDF polyamide composite membrane are characterized by XRD, SEM, TEM, AFM and zeta potential. MOF-199@GO modified PVDF composite NF membrane which possesses dense and uniform polyamide thin-layer exhibits higher negative surface potential (up to ~37 mV) at pH 9.5. The performance of MOF-199@GO modified PVDF polyamide composite NF membrane has been investigated by determination of pure water flux and salt rejection. The prepared NF membrane MG3 exhibited highly efficient rejection of MgSO4, Na2SO4, NaCl and MgCl2, which are 93.56%, 93.04%, 87.48% and 87.11%, respectively. This work provides a worthy reference for designing highly efficient NF membranes modified by MOF and relevant materials. © 2020, Editorial Board of CIESC Journal. All right reserved.
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页码：297 / 305
页数：8
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