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ACS applied materials & interfaces 92건

  1. [해외논문]   Elevated Performance of Thin Film Nanocomposite Membranes Enabled by Modified Hydrophilic MOFs for Nanofiltration   SCI SCIE

    Zhu, Junyong (Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, ) , Qin, Lijuan (School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, ) , Uliana, Adam (Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, ) , Hou, Jingwei (UNESCO Centre for Membrane Science and Technology, School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, ) , Wang, Jing (Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, ) , Zhang, Yatao (School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, ) , Li, Xin (Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, ) , Yuan, Shushan (Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, ) , Li, Jian (Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, ) , Tian, Miaomiao (Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, ) , Lin, Jiuyang (School of Environment and Resources, Qi Shan Campus, Fuzhou University) , Van der Bruggen, Bart
    ACS applied materials & interfaces v.9 no.2 ,pp. 1975 - 1986 , 2017 , 1944-8244 ,

    초록

    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 Na 2 SO 4 . 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. Graphic Abstract ACS Electronic Supporting Info

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  2. [해외논문]   First-Principles Investigations of the Working Mechanism of 2D h-BN as an Interfacial Layer for the Anode of Lithium Metal Batteries   SCI SCIE

    Shi, Le , Xu, Ao , Zhao, Tianshou
    ACS applied materials & interfaces v.9 no.2 ,pp. 1987 - 1994 , 2017 , 1944-8244 ,

    초록

    An issue with the use of metallic lithium as an anode material for lithium-based batteries is dendrite growth, causing a periodic breaking and repair of the solid electrolyte interphase (SEI) layer. Adding 2D atomic crystals, such as h -BN, as an interfacial layer between the lithium metal anode and liquid electrolyte has been demonstrated to be effective to mitigate dendrite growth, thereby enhancing the Columbic efficiency of lithium metal batteries. But the underlying mechanism leading to the reduced dendrite growth remains unknown. In this work, with the aid of first-principle calculations, we find that the interaction between the h -BN and lithium metal layers is a weak van der Waals force, and two atomic layers of h -BN are thick enough to block the electron tunneling from lithium metal to electrolyte, thus prohibiting the decomposition of electrolyte. The interlayer spacing between the h -BN and lithium metal layers can provide larger adsorption energies toward lithium atoms than that provided by bare lithium or h -BN, making lithium atoms prefer to intercalate under the cover of h -BN during the plating process. The combined high stiffness of h -BN and the low diffusion energy barriers of lithium at the Li/ h -BN interfaces induce a uniform distribution of lithium under h -BN, therefore effectively suppressing dendrite growth. Graphic Abstract

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