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

Kasneryk V, Opanasenko M, Shamzhy M, Musilova Z, Avadhut Y, Hartmann M, Cejka J (2017)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2017

Journal

Journal of Materials Chemistry A Royal Society of Chemistry

Publisher: ROYAL SOC CHEMISTRY

Book Volume: 5

Pages Range: 22576-22587

Journal Issue: 43

DOI: 10.1039/c7ta05935c

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.

Authors with CRIS profile

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

Additional Organisation(s)

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

Involved external institutions

Univerzita Karlova v Praze / Charles University in Prague CZ Czech Republic (CZ) Academy of Sciences of the Czech Republic (ASCR) / Akademie věd České republiky (AVČR) CZ Czech Republic (CZ)

How to cite

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://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.

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