title: In situ synthesis of MOF membranes on ZnAl-CO3 LDH buffer layer-modified substrates.
abstract: We develop here a urea hydrolysis method to in situ prepare asymmetric ZnAl-CO3 layered double hydroxide (LDH) buffer layers with various stable equilibrium morphology on porous Al2O3 substrates. In particular it is found that well-intergrown ZIF-8 membranes can be directly synthesized on the ZnAl-CO3 LDH buffer layer-modified substrates, owing to the specific metal-imidazole interaction between ZnAl-CO3 LDHs and ZIF-8. Other Zn-based MOF membranes, like ZIF-7 and ZIF-90, can also be synthesized with this method. Our finding demonstrates that LDH buffer layer represents a new concept for substrate modification.
authors.affiliation: Department of Physical Chemistry and Electrochemistry, Leibniz University Hannover , Callinstr. 22, 30167, Hannover, Germany.
authors.forename: Yi
authors.initials: Y
authors.lastname: Liu
authors.forename: Nanyi
authors.initials: N
authors.lastname: Wang
authors.forename: Jia Hong
authors.initials: JH
authors.lastname: Pan
authors.forename: Frank
authors.initials: F
authors.lastname: Steinbach
authors.forename: Jürgen
authors.initials: J
authors.lastname: Caro