An alternative activation method for the enhancement of methane storage capacity of nanoporous aluminium terephthalate, MIL-53(Al)

The Metal–Organic Framework MIL‐53(Al) Constructed from Multiple Metal Sources: Alumina, Aluminum Hydroxide, and Boehmite

“…[21] After further activation at 150 8C, the XRD patterns of the MIL-53 AlOH and MIL-53 BM samples are in agreement with the calculated MIL-53(Al)lt (low-temperature) phase, and the XRD pattern of MIL-53 AlO matches the calculated MIL-53(Al)ht (high temperature) phase [16] (Supporting Information, Figure S1), thus revealing the successful conversion of the selected aluminum sources into MIL-53(Al). Among the MIL-53(Al) products derived from the four aluminum sources, MIL-53 BM presents the sharpest diffraction peaks and thus the highest degree of crystallinity.…”

“…The obtained white powders were extracted from water and immersed in the DMF for another 12 h at 130 8C. [21] Finally, the obtained products were washed with methanol and dried under vacuum at 80 8C overnight for further use. The samples prepared from Al 2 O 3 , Al(OH) 3 , and boehmite are designated as MIL-53 AlO , MIL-53 AlOH , and MIL-53 BM , respectively.…”

Activated MIL-53(Al) for Efficient Adsorption of Dichloromethane and Trichlormethane

“…The periodic models of the lp phase were built using the atomic coordinates previously reported (Ortiz et al, 2011). The intermolecular interactions were considered as follows: the set of Lennard -Jones (LJ) parameters for describing the lp phase frameworks were created by combining the generic Universal Force Field for the inorganic part of the crystalline lattice and the Dreiding interatomic potential for the organic part (Rallapalli et al, 2010).…”

“…The equilibrium conformation state with a given temperature and pressure depends on the loading of guest molecules. The breathing transitions between lp and np phases are spontaneous process upon the adsorbed molecules, such as CO 2 (Rallapalli et al, 2010;Ganesh et al, 2014) and H 2 O (Chen et al, 2013). Loaded molecules induce a significant stress inside the elastic framework that is in the order of several to tens of MPa.…”

“…In HT activation method, BDC molecules are still trapped in the pores because they sublime only at high temperature higher than 675 K. On the other hand, in SE activation method, the solvent can't escape from the pores completely and the trapped solvent molecules decrease the specific surface area. Besides the two activation methods, a more effective combined activation method to activate MIL-53(Al) sample completely had been presented (Rallapalli et al, 2010;Ghoufi et al, 2012). The advantages of the combined activation method and the drawbacks of the HT and SE methods will be illustrated comprehensively.…”