Abstract:
Constructing a robust hybrid material with a
porous inorganic and a porous organic framework is
highly intriguing owing to its diverse functionality and porosity. However, the line of synthesis is not straightforward, since their nucleation and crystal growth processes
are incompatible. Here, a simple method for the fabrication of hybrid zeolite/metal–organic framework of different framework structures is developed wherein the lessuseful extra-framework aluminum species present in the
zeolite surrogate the growth of metal organic framework
(MOF) from the zeolite matrix in the presence of organic
linkers of the corresponding MOF. An NMR study confirms
that all the octahedral Al species are converted to Al-MOF.
TGA analysis shows that 32% Al of H-Beta is converted to
Al-MOF. Furthermore, NH3 TPD analysis shows that most
of the weak acid sites disappear but strong acid sites are
preserved suggesting the utilization of weakly bound Al
species of H-Beta in the growth of Al-MOF. The synthesis
strategy is successfully demonstrated using H-Beta, HZSM-5, and H-Y zeolites for the growth of MIL-53 and MIL96 MOFs from the zeolite matrix. This synthesis strategy
enables application-based engineering of the framework
structures, functionality, and porosity of the materials.
