Consecutive interlayer disassembly-reassembly during alumination of UOV zeolites: insight into the mechanism

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Kasneryk V, Opanasenko M, Shamzhy M, Musilova Z, Avadhut Y, Hartmann M, Cejka J
Zeitschrift: Journal of Materials Chemistry A
Verlag: ROYAL SOC CHEMISTRY
Jahr der Veröffentlichung: 2017
Band: 5
Heftnummer: 43
Seitenbereich: 22576-22587
ISSN: 2050-7488
Sprache: Englisch


Abstract


Investigation of the kinetics of UOV germanosilicate alumination by X-ray diffraction, Al-27 and Si-29 MAS NMR, ICP/OES and FTIR spectroscopy showed the multi-stage mechanism of the process. The first step consists of degermanation and partial disassembly followed by Al incorporation into the UOV germanosilicate framework in the second step. The Al atoms stabilize the UOV framework by healing the defects formed after rapid hydrolysis of Ge-O-Si bonds, which was evidenced by comparison with the reference treatment of initial UOV samples with HNO3 (pH = 2). Post-synthesis alumination of UOV leads to the generation of strong Bronsted and Lewis acid sites; their ratio in aluminated UOV derivatives can be adjusted by the variation of treatment conditions. The intrinsic properties of parent UOV germanosilicates determine the textural properties of aluminated derivatives.



FAU-Autoren / FAU-Herausgeber

Avadhut, Yamini Dr.
Interdisziplinäres Zentrum Erlangen Catalysis Resource Center (ECRC)
Hartmann, Martin Prof. Dr.
Professur für Katalyse


Zusätzliche Organisationseinheit(en)
Interdisziplinäres Zentrum Erlangen Catalysis Resource Center (ECRC)
Exzellenz-Cluster Engineering of Advanced Materials


Autor(en) der externen Einrichtung(en)
The Czech Academy of Sciences
Univerzita Karlova v Praze / Charles University in Prague


Zitierweisen

APA:
Kasneryk, V., Opanasenko, M., Shamzhy, M., Musilova, Z., Avadhut, Y., Hartmann, M., & Cejka, J. (2017). Consecutive interlayer disassembly-reassembly during alumination of UOV zeolites: insight into the mechanism. Journal of Materials Chemistry A, 5(43), 22576-22587. https://dx.doi.org/10.1039/c7ta05935c

MLA:
Kasneryk, Valeryia, et al. "Consecutive interlayer disassembly-reassembly during alumination of UOV zeolites: insight into the mechanism." Journal of Materials Chemistry A 5.43 (2017): 22576-22587.

BibTeX: 

Zuletzt aktualisiert 2019-15-03 um 09:48