Synthesis of ZSM-5 Zeolites with Defined Distribution of Al Atoms in the Framework and Multinuclear MAS NMR Analysis of the Control of Al Distribution

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F12%3A00384499" target="_blank" >RIV/61388955:_____/12:00384499 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1021/cm301629a" target="_blank" >http://dx.doi.org/10.1021/cm301629a</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/cm301629a" target="_blank" >10.1021/cm301629a</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Synthesis of ZSM-5 Zeolites with Defined Distribution of Al Atoms in the Framework and Multinuclear MAS NMR Analysis of the Control of Al Distribution

Popis výsledku v původním jazyce

Sets of ZSM-5 zeolites with different distributions of Al atoms in the framework were synthesized from the mixtures of Si/Al-gel 25-90, varying in the sequence of mixing and using Na-silicate or tetraethoxy orthosilicate as the Si source, AlCl3 or Al(NO3)(3) as the Al source, NaCl or Na-silicate as the Na source, and tetrapropylammonium hydroxide as the structure directing agent. The distribution of Al atoms in the ZSM-5 framework between single Al atoms and Al pairs of Al-O-(Si-O)(2)-Al sequences was monitored by the Si-29 MAS NMR, Co(II) ion exchange capacity and UV-vis spectroscopy of bare Co(II) ions in the dehydrated zeolites. The results showed that the distribution of Al atoms in the ZSM-5 framework can be controlled in a wide range of concentrations (6-66% of Al atoms in Al pairs for the given Si/Al) and Si/Al-prod 15-37. From the analysis of both the initial gels and crystalline products by the C-13, Al-27, and Si-29 (SP and CP) MAS NMR and FTIR, it was concluded that the elec

Název v anglickém jazyce

Synthesis of ZSM-5 Zeolites with Defined Distribution of Al Atoms in the Framework and Multinuclear MAS NMR Analysis of the Control of Al Distribution

Popis výsledku anglicky

Sets of ZSM-5 zeolites with different distributions of Al atoms in the framework were synthesized from the mixtures of Si/Al-gel 25-90, varying in the sequence of mixing and using Na-silicate or tetraethoxy orthosilicate as the Si source, AlCl3 or Al(NO3)(3) as the Al source, NaCl or Na-silicate as the Na source, and tetrapropylammonium hydroxide as the structure directing agent. The distribution of Al atoms in the ZSM-5 framework between single Al atoms and Al pairs of Al-O-(Si-O)(2)-Al sequences was monitored by the Si-29 MAS NMR, Co(II) ion exchange capacity and UV-vis spectroscopy of bare Co(II) ions in the dehydrated zeolites. The results showed that the distribution of Al atoms in the ZSM-5 framework can be controlled in a wide range of concentrations (6-66% of Al atoms in Al pairs for the given Si/Al) and Si/Al-prod 15-37. From the analysis of both the initial gels and crystalline products by the C-13, Al-27, and Si-29 (SP and CP) MAS NMR and FTIR, it was concluded that the elec

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GAP106%2F11%2F0624" target="_blank" >GAP106/11/0624: Nová kategorie zeolitů s pentasilovou strukturou: Katalytické procesy na zeolitech s řízenou distribucí hliníku ve skeletu</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Chemistry of Materials

ISSN

0897-4756

e-ISSN

—

Svazek periodika

24

Číslo periodika v rámci svazku

16

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

3231-3239

Kód UT WoS článku

000307988800015

EID výsledku v databázi Scopus

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