A novel preparation method was proposed for a metal–organic
framework (MOF) monolith using a simple one-pot synthesis method.
A MOF tubular monolith was successfully prepared by the hydrothermal
treatment for an α-Al2O3monolith in an
aqueous solution of 1,3,5-benzenetricarboxylic acid and nitric acid
without the addition of a metal source. The effects of temperature
and the HNO3concentration in the synthesis solution on
the crystallization behavior of MIL-96 were studied. HNO3enhanced the dissolution of the α-Al2O3monolith and the growth of MIL-96. The growth rate of MIL-96 was
also influenced by the synthesis temperature; a synthesis temperature
of over 453 K was required for crystallization. The CO2adsorption capacity of the prepared MIL-96 monoliths was evaluated
and found to be comparable to that of the well-grown MIL-96 powdery
crystal. Furthermore, the MIL-96 monoliths demonstrated good stability
as their adsorption properties were retained even after 2 months of
storage under atmospheric conditions.