Počet záznamů: 1

Ultrasonic Pretreatment as a Tool for the Preparation of Low-Defect Zeolite Mordenite

SYSNO ASEP	0539489
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Ultrasonic Pretreatment as a Tool for the Preparation of Low-Defect Zeolite Mordenite
Tvůrce(i)	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, ORCID}
Zdroj.dok.	ACS Omega. - : American Chemical Society - ISSN 2470-1343 Roč. 6, č. 3 (2021), s. 2340-2345
Poč.str.	6 s.
Jazyk dok.	eng - angličtina
Země vyd.	US - Spojené státy americké
Klíč. slova	zeolites ; ultrasonic pretreatment ; 29Si magic-angle spinning nuclear magnetic resonance
Vědní obor RIV	CF - Fyzikální chemie a teoretická chemie
Obor OECD	Physical chemistry
CEP	GJ17-09188Y GA ČR - Grantová agentura ČR
	EF16_013/0001821 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
Způsob publikování	Open access
Institucionální podpora	UFCH-W - RVO:61388955
UT WOS	000613926400057
EID SCOPUS	85099920729
DOI	10.1021/acsomega.0c05655
Anotace	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.
Pracoviště	Ústav fyzikální chemie J.Heyrovského
Kontakt	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Rok sběru	2022
Elektronická adresa	http://hdl.handle.net/11104/0317226

Počet záznamů: 1