Number of the records: 1
Ultrasonic Pretreatment as a Tool for the Preparation of Low-Defect Zeolite Mordenite
- 1.
SYSNO ASEP 0539489 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Ultrasonic Pretreatment as a Tool for the Preparation of Low-Defect Zeolite Mordenite Author(s) Kornas, Agnieszka (UFCH-W) ORCID, RID
Olszówka, Joanna Elżbieta (UFCH-W) ORCID
Urbanová, Martina (UFCH-W)
Brabec, Libor (UFCH-W) RID, ORCID
Rathouský, Jiří (UFCH-W) RID, ORCID
Dědeček, Jiří (UFCH-W) RID, ORCID
Pashkova, Veronika (UFCH-W) RID, ORCIDSource Title ACS Omega. - : American Chemical Society - ISSN 2470-1343
Roč. 6, č. 3 (2021), s. 2340-2345Number of pages 6 s. Language eng - English Country US - United States Keywords zeolites ; ultrasonic pretreatment ; 29Si magic-angle spinning nuclear magnetic resonance Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry R&D Projects GJ17-09188Y GA ČR - Czech Science Foundation (CSF) EF16_013/0001821 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UFCH-W - RVO:61388955 UT WOS 000613926400057 EID SCOPUS 85099920729 DOI 10.1021/acsomega.0c05655 Annotation The effects of the ultrasonic (US) pretreatment of synthesis gel for the preparation of mordenite zeolite were studied in comparison with the classical stirring method. Even though the US pretreatment was performed before the hydrothermal crystallization, it significantly affected the properties of the obtained mordenite crystals. The US-assisted procedure resulted in a material with improved textural characteristics, in particular, the micropore volume accessible for nitrogen molecules in the as-made form. On the other hand, mordenite prepared with the classical stirring method demonstrated comparable sorption properties only after a postsynthetic treatment. Moreover, in the case of US-pretreated mordenite, altered crystal shape and more homogeneous morphology were observed. 29Si magic-angle spinning nuclear magnetic resonance (MAS NMR) demonstrated that the US pretreatment introduced structural changes on the atomic level, resulting in fewer defects (reflected in the number of silanol groups) and less pore blockage (affected by Na+ cations) for the as-made sample. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2022 Electronic address http://hdl.handle.net/11104/0317226
Number of the records: 1