Počet záznamů: 1
Structural analysis of IPC zeolites and related materials using positron annihilation spectroscopy and high-resolution argon adsorption
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SYSNO ASEP 0461874 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Structural analysis of IPC zeolites and related materials using positron annihilation spectroscopy and high-resolution argon adsorption Tvůrce(i) Jagiello, J. (US)
Sterling, N.C. (US)
Eliášová, Pavla (UFCH-W) RID
Opanasenko, Maksym (UFCH-W) RID, ORCID
Zukal, Arnošt (UFCH-W) RID
Morris, R. E. (GB)
Navaro, M. (GB)
Mayoral, A. (ES)
Crivelli, P. (CH)
Warringham, R. (CH)
Mitchell, S. (CH)
Pérez-Ramirez, J. (CH)
Čejka, Jiří (UFCH-W) RID, ORCID, SAIZdroj.dok. Physical Chemistry Chemical Physics. - : Royal Society of Chemistry - ISSN 1463-9076
Roč. 18, MAY 2016 (2016), s. 15269-15277Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova PORE-SIZE ; POROUS MATERIALS ; LIFETIME SPECTROSCOPY Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEP GAP106/12/0189 GA ČR - Grantová agentura ČR Institucionální podpora UFCH-W - RVO:61388955 UT WOS 000378273500059 EID SCOPUS 84973665430 DOI 10.1039/c6cp01950a Anotace The advanced investigation of pore networks in isoreticular zeolites and mesoporous materials related to the IPC family was performed using high-resolution argon adsorption experiments coupled with the development of a state-of-the-art non-local density functional theory approach. The optimization of a kernel for model sorption isotherms for materials possessing the same layer structure, differing only in the interlayer connectivity (e.g. oxygen bridges, single- or double-four-ring building units, mesoscale pillars etc.) revealed remarkable differences in their porous systems. Using high-resolution adsorption data, the bimodal pore size distribution consistent with crystallographic data for IPC-6, IPC-7 and UTL samples is shown for the first time. A dynamic assessment by positron annihilation lifetime spectroscopy (PALS) provided complementary insights, simply distinguishing the enhanced accessibility of the pore network in samples incorporating mesoscale pillars and revealing the presence of a certain fraction of micropores undetected by gas sorption. Nonetheless, subtle differences in the pore size could not be discriminated based on the widely-applied Tao–Eldrup model. The combination of both methods can be useful for the advanced characterization of microporous, mesoporous and hierarchical materials. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2017
Počet záznamů: 1