title: Significantly Enhanced Separation using ZIF-8 Membranes by Partial Conversion of Calcined Layered Double Hydroxide Precursors.
abstract: Significantly enhanced H2 /CH4 (ca. 80) selectivity was realized by effective suppression of the framework flexibility of a prepared ZIF-8 membrane. Initially a ZnO buffer layer consisting of 20 nm-sized ZnO-nanoparticle aggregates was fabricated by controlled calcination of a ZnAl-NO3 layered double hydroxide membrane. Owing to its high chemical reactivity, the ZnO buffer layer was partially converted into a well-intergrown ZIF-8 membrane with a certain penetration depth upon solvothermal treatment with ligands. Our method may represent a new concept for the design of advanced MOF membranes with high selectivity.
authors.affiliation: Institute of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstr. 22, 30167, Hannover, Germany. yliu@icems.kyoto-u.ac.jp.|Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan. yliu@icems.kyoto-u.ac.jp.
authors.forename: Yi
authors.initials: Y
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, Dalian, PR China.|University of Chinese Academy of Sciences, 100049, Beijing, PR China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Peng
authors.affiliation: Institute of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstr. 22, 30167, Hannover, Germany.
authors.forename: Nanyi
authors.initials: N
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, Dalian, PR China.
authors.forename: Yanshuo
authors.initials: Y
authors.lastname: Li
authors.affiliation: Beijing Key Laboratory of Novel Thin Film Solar Cells, School of Renewable Energy, North China Electric Power University, Beijing, 102206, China.
authors.forename: Jia Hong
authors.initials: JH
authors.lastname: Pan
authors.affiliation: State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, Dalian, PR China.
authors.forename: Weishen
authors.initials: W
authors.lastname: Yang
authors.affiliation: Institute of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstr. 22, 30167, Hannover, Germany.
authors.forename: Jürgen
authors.initials: J
authors.lastname: Caro
mesh_terms: D005740:Gases / Q000302:isolation & purification*; D006859:Hydrogen / Q000302:isolation & purification; D006878:Hydroxides / Q000737:chemistry*; D008567:Membranes, Artificial; D008697:Methane / Q000302:isolation & purification; D008855:Microscopy, Electron, Scanning; D053758:Nanoparticles / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D016062:Porosity; D013499:Surface Properties; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D005740:Gases; D006878:Hydroxides; D008567:Membranes, Artificial; D009942:Organometallic Compounds; D006859:Hydrogen; D008697:Methane; D015034:Zinc Oxide
keywords: ZnO; layered compounds; membranes; metal-organic frameworks; solvothermal growth