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Description
| - Byl syntetizován nový mesoporézní materiál na bázi Nb,Sn-SBA-15 přimým přidáním Sn a Nb do reakční směsi. Tento katalyzátor vykazuje vysokou disperzitu obou kovů v křemičitanové matrici. Optimalizace reakčních podmínek umožnla tvorbu mesoporézního síta s velikostí porů až 14 nm. Koordinace atomů byla studována pomocí UV-VIS a katalytických testů při oxidaci cyklohexenu v kapalné fázi. Podařilo se připravit nový typ katalyzátoru s vysokou oxidační aktivitou. (cs)
- A novel bifunctional mesoporous material Nb,Sn-SBA-15 has been synthesized in one pot synthesis by in-situ introduction of niobium and tin salts and by controlling the synthesis conditions. These molecular sieves possess a high dispersion of both metals resulting in both the strong and weak acidic sites being simultaneously formed on SBA-15. Optimization of acid concentration in synthetic gels resulted in tuning of pore geometries while maintaining high structural regularity and in silica frameworks appropriate for catalytic applications were proved by UV-vis spectroscopy and catalytic reaction. Activity and selectivity of niobium/tincontaining mesoporous molecular sieves have been tested in liquid phase oxidation of cyclohexene. On the basis of this investigation, the new efficient NbSBA-15 catalyst prepared via conventional synthesis has been selected.
- A novel bifunctional mesoporous material Nb,Sn-SBA-15 has been synthesized in one pot synthesis by in-situ introduction of niobium and tin salts and by controlling the synthesis conditions. These molecular sieves possess a high dispersion of both metals resulting in both the strong and weak acidic sites being simultaneously formed on SBA-15. Optimization of acid concentration in synthetic gels resulted in tuning of pore geometries while maintaining high structural regularity and in silica frameworks appropriate for catalytic applications were proved by UV-vis spectroscopy and catalytic reaction. Activity and selectivity of niobium/tincontaining mesoporous molecular sieves have been tested in liquid phase oxidation of cyclohexene. On the basis of this investigation, the new efficient NbSBA-15 catalyst prepared via conventional synthesis has been selected. (en)
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Title
| - Exploring the catalytic activity of regular and ultralarge-pore Nb,Sn-SBA-15 mesoporous molecular sieves
- Exploring the catalytic activity of regular and ultralarge-pore Nb,Sn-SBA-15 mesoporous molecular sieves (en)
- Výzkum katalytické aktivity na bázi Nb,Sn-SBA-15 mesoporézních molekulových sít (cs)
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skos:prefLabel
| - Exploring the catalytic activity of regular and ultralarge-pore Nb,Sn-SBA-15 mesoporous molecular sieves
- Exploring the catalytic activity of regular and ultralarge-pore Nb,Sn-SBA-15 mesoporous molecular sieves (en)
- Výzkum katalytické aktivity na bázi Nb,Sn-SBA-15 mesoporézních molekulových sít (cs)
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skos:notation
| - RIV/61388955:_____/07:00085035!RIV08-AV0-61388955
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http://linked.open.../vavai/riv/strany
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http://linked.open...avai/riv/aktivita
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http://linked.open...avai/riv/aktivity
| - P(1ET400400413), P(FT-TA/040), R, Z(AV0Z40400503)
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http://linked.open...iv/cisloPeriodika
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http://linked.open...vai/riv/dodaniDat
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http://linked.open...aciTvurceVysledku
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http://linked.open.../riv/druhVysledku
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http://linked.open...iv/duvernostUdaju
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http://linked.open...titaPredkladatele
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http://linked.open...dnocenehoVysledku
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http://linked.open...ai/riv/idVysledku
| - RIV/61388955:_____/07:00085035
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http://linked.open...riv/jazykVysledku
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http://linked.open.../riv/klicovaSlova
| - mesoporous molecular sieves; ultralerge-pore; Nb,Sn-SBA-15 (en)
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http://linked.open.../riv/klicoveSlovo
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http://linked.open...odStatuVydavatele
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http://linked.open...ontrolniKodProRIV
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http://linked.open...i/riv/nazevZdroje
| - Studies in Surface Science and Catalysis
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http://linked.open...in/vavai/riv/obor
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http://linked.open...ichTvurcuVysledku
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http://linked.open...cetTvurcuVysledku
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http://linked.open...vavai/riv/projekt
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http://linked.open...UplatneniVysledku
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http://linked.open...v/svazekPeriodika
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http://linked.open...iv/tvurceVysledku
| - Čejka, Jiří
- Nekoksová, Iveta
- Feliczak, A.
- Nowak, I.
- Tomczak, A.
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http://linked.open...n/vavai/riv/zamer
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issn
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number of pages
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