Up to date, zeolite films have been
mainly fabricated by in situ
crystallization, secondary growth in a solution/hydrogel, or occasionally
by vapor phase transformation of dry gel. Here we demonstrate for
the first time a solvent-free secondary growth method for b-oriented silica MFI zeolite films using the synthetic
powder from ground anhydrous raw solids in the presence of NH4F. Typically, precisely b-oriented MFI zeolite
films are synthesized from seed layers of highly b-oriented MFI zeolite crystals in the synthetic powder of 1SiO2:0.035TPABr:0.05NH4F at 175 °C for 6 h. If
needed, b-oriented MFI zeolite multilayer films can
be acquired by changing the synthesis time or the amount of NH4F in the synthetic powder. Compared with the traditional hydrothermal
synthesis, the approach developed here may provide a new avenue for
fabricating high quality zeolite films/membranes.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.