2 research outputs found
Proglašen Zakonik kanona istočnih crkava
The hydrothermal
synthesis of a zeolite with properties suitable
for use in the assembly–disassembly–organization–reassembly
(ADOR) process was designed, and a zeolite called SAZ-1 was successfully
prepared. This zeolite was then used as a parent in the ADOR process,
and two new daughter zeolites, IPC-15 and IPC-16, were prepared. The
X-ray powder diffraction patterns of the new zeolites match well with
those predicted using computational methods. The three materials form
an isoreticular series with decreasing pores size from 14-ring to
12-ring to 10-ring
<i>In Situ</i> Single-crystal X‑ray Diffraction Studies of Physisorption and Chemisorption of SO<sub>2</sub> within a Metal–Organic Framework and Its Competitive Adsorption with Water
Living on an increasingly polluted planet, the removal
of toxic
pollutants such as sulfur dioxide (SO2) from the troposphere
and power station flue gas is becoming more and more important. The
CPO-27/MOF-74 family of metal–organic frameworks (MOFs) with
their high densities of open metal sites is well suited for the selective
adsorption of gases that, like SO2, bind well to metals
and have been extensively researched both practically and through
computer simulations. However, until now, focus has centered upon
the binding of SO2 to the open metal sites in this MOF
(called chemisorption, where the adsorbent–adsorbate interaction
is through a chemical bond). The possibility of physisorption (where
the adsorbent–adsorbate interaction is only through weak intermolecular
forces) has not been identified experimentally. This work presents
an in situ single-crystal X-ray diffraction (scXRD)
study that identifies discrete adsorption sites within Ni-MOF-74/Ni-CPO-27,
where SO2 is both chemisorbed and physisorbed while also
probing competitive adsorption of SO2 of these sites when
water is present. Further features of this site have been confirmed
by variable SO2 pressure scXRD studies, DFT calculations,
and IR studies