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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
materials science
Elevated performance of thin film nanocomposite membranes enabled by modified hydrophilic MOFs for nanofiltration
ACS Applied Materials and Interfaces, Volume 9, No. 2, Year 2017
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Description
Metal−organic frameworks (MOFs) are studied for the design of advanced nanocomposite membranes, primarily due to their ultrahigh surface area, regular and highly tunable pore structures, and favorable polymer affinity. However, the development of engineered MOF-based membranes for water treatment lags behind. Here, thin-film nanocomposite (TFN) membranes containing poly(sodium 4-styrenesulfonate) (PSS) modified ZIF-8 (mZIF) in a polyamide (PA) layer were constructed via a facile interfacial polymerization (IP) method. The modified hydrophilic mZIF nanoparticles were evenly dispersed into an aqueous solution comprising piperazine (PIP) monomers, followed by polymerizing with trimesoyl chloride (TMC) to form a composite PA film. FT-IR spectroscopy and XPS analyses confirm the presence of mZIF nanoparticles on the top layer of the membranes. SEM and AFM images evince a retiform morphology of the TFN-mZIF membrane surface, which is intimately linked to the hydrophilicity and adsorption capacity of mZIF nanoparticles. Furthermore, the effect of different ZIF-8 loadings on the overall membrane performance was studied. Introducing the hydrophilizing mZIF nanoparticles not only furnishes the PA layer with a better surface hydrophilicity and more negative charge but also more than doubles the original water permeability, while maintaining a high retention of Na2SO4. The ultrahigh retentions of reactive dyes (e.g., reactive black 5 and reactive blue 2, >99.0%) for mZIF-functionalized PA membranes ensure their superior nanofiltration performance. This facile, cost-effective strategy will provide a useful guideline to integrate with other modified hydrophilic MOFs to design nanofiltration for water treatment. © 2016 American Chemical Society.
Authors & Co-Authors
Zhu, Junyong
Belgium, Leuven
Ku Leuven
Qin, Lijuan
China, Zhengzhou
Zhengzhou University
Uliana, Adam Andrew
United States, University Park
Pennsylvania State University
Hou, Jingwei
Australia, Sydney
Unsw Sydney
Wang, Jing
Belgium, Leuven
Ku Leuven
China, Zhengzhou
Zhengzhou University
Zhang, Yatao
China, Zhengzhou
Zhengzhou University
Li, Xin
Belgium, Leuven
Ku Leuven
Yuan, Shushan
Belgium, Leuven
Ku Leuven
Li, Jian
Belgium, Leuven
Ku Leuven
Tian, Miaomiao
Belgium, Leuven
Ku Leuven
Lin, Jiuyang
China, Fuzhou
Fuzhou University
van der Bruggen, Bart
Belgium, Leuven
Ku Leuven
Statistics
Citations: 351
Authors: 12
Affiliations: 5
Identifiers
Doi:
10.1021/acsami.6b14412
ISSN:
19448244
Research Areas
Environmental