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Insight into the ADOR zeolite-to-zeolite transformation: UOV case

DOI: 10.1039/C7DT03751A DOI Help

Authors: Valeryia Kasneryk (J. Heyrovský Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic) , Mariya Shamzhy (Charles University) , Maksym Opanasenko (Charles University) , Paul S. Wheatley (University of St Andrews) , Russell Morris (Charles University; University of St Andrews) , Jiří Čejka (J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Dalton Transactions

State: Published (Approved)
Published: December 2017

Abstract: PC-12 zeolite is the first member of ADOR family produced by the structural transformation of UOV. The details of UOV rearrangement were studied to determine the influence of properties of parent zeolite and treatment conditions on the outcome of IPC-12 formation. It was established that incomplete disassembly of UOV can be caused by insufficient lability of interlayer connectivity in parent material possessing Si-enriched D4Rs or by inhibition of hydrolysis by diluted acid at high temperature. The impacts of specific interactions of the framework with anions on controllable breaking of interlayer connectivity as well as the conditions of the treatment at low pH (< –1) on the characteristics of produced IPC-12 were found to be negligible. Concentration of acid significantly influences the extent and even the direction of UOV transformation. Layers disassembly is inhibited in 1 – 4 M acid solutions, complete hydrolysis to layered precursor can be achieved in 0.1 M, while application of 12 M solution lead to direct formation of IPC-12. Layers reassembly followed using in situ XRD measurement with synchrotron source was found to be gradual process starting already at 40 °C and completing at 200 – 220 °C.

Journal Keywords: ADOR; zeolites; germanosilicates; structure rearrangement

Subject Areas: Chemistry, Materials

Instruments: I11-High Resolution Powder Diffraction

Added On: 14/12/2017 10:17

Discipline Tags:

Zeolites Chemistry Materials Science Inorganic Chemistry

Technical Tags:

Diffraction X-ray Powder Diffraction