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rdf:type
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Description
| - The effect of the framework Al content and synthesis procedure on the number of framework Al atoms located on the surface of (Al)MCM-41 channels and the distribution of the Al atoms between single Al atoms and various Al-O-(Si-O)1,2-Al species was investigated. The total number of accessible framework Al atoms on the channel surface was obtained from the ion exchange capacity for Na+ ions and pyridine adsorption. The number of Al pairs on the surface and their distribution between different local arrangements of the channel surface was estimated using Vis spectroscopy of Co2+ ions. At low framework Al contents, Al atoms occupy only accessible T sites on the surface of the channel walls. In aluminium-rich (Al)MCM-41, a significant part of Al atoms is incorporated inside the channel walls and these Al atoms do not form cationic sites. Al atoms on the wall surface preferentially form Al-O-(Si-O)1,2-Al sequences, enabling siting of divalent cations.
- The effect of the framework Al content and synthesis procedure on the number of framework Al atoms located on the surface of (Al)MCM-41 channels and the distribution of the Al atoms between single Al atoms and various Al-O-(Si-O)1,2-Al species was investigated. The total number of accessible framework Al atoms on the channel surface was obtained from the ion exchange capacity for Na+ ions and pyridine adsorption. The number of Al pairs on the surface and their distribution between different local arrangements of the channel surface was estimated using Vis spectroscopy of Co2+ ions. At low framework Al contents, Al atoms occupy only accessible T sites on the surface of the channel walls. In aluminium-rich (Al)MCM-41, a significant part of Al atoms is incorporated inside the channel walls and these Al atoms do not form cationic sites. Al atoms on the wall surface preferentially form Al-O-(Si-O)1,2-Al sequences, enabling siting of divalent cations. (en)
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Title
| - (Al)MCM-41 Molecular Sieves. Aluminium Distribution, Uniformity and Structure of Inner Surface.
- (Al)MCM-41 Molecular Sieves. Aluminium Distribution, Uniformity and Structure of Inner Surface. (en)
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skos:prefLabel
| - (Al)MCM-41 Molecular Sieves. Aluminium Distribution, Uniformity and Structure of Inner Surface.
- (Al)MCM-41 Molecular Sieves. Aluminium Distribution, Uniformity and Structure of Inner Surface. (en)
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skos:notation
| - RIV/61388955:_____/03:54030154!RIV/2004/AV0/A54004/N
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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(GA104/02/0571), P(IAA4040001), P(IBS4040017), Z(AV0Z4040901)
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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:_____/03:54030154
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http://linked.open...riv/jazykVysledku
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http://linked.open.../riv/klicovaSlova
| - molecular sieves; mesoporous materials; Vis spectroscopy (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
| - Collection of Czechoslovak Chemical Communications
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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...ocetUcastnikuAkce
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http://linked.open...nichUcastnikuAkce
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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
| - Dědeček, Jiří
- Čejka, Jiří
- Žilková, Naděžda
- Kotrla, Josef
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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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