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Statements

Subject Item
n2:RIV%2F61388980%3A_____%2F07%3A00082031%21RIV07-GA0-61388980
rdf:type
n10:Vysledek skos:Concept
dcterms:description
V připravených materiálech byly identifikovány formy Fe(III), především metodami UV-Vis spektroskopie, voltametrie mikročástic a chemické extrakce Fe(III) pomocí Ni-edta, byla zkoumána jejich tepelná stabilita pomocí HT-XRD a zjištěna jejich výborná sorpční schopnost zejména k arzeničnanu a nepříliš dobré katalytické schopnosti při reakcích propanu. Two major species were identified in Fe-treated montmorillonite: monomeric or dimeric hydroxoaqua cations .Form II behaves similarly to hydrous ferric oxides, but its thermal crystallization to hematite is postponed to 500–600 grad C. The Fe3+ cations in the interlayer space are much less thermally stable than Al pillars in pillared interlayered clays (PILCs). Form I is more active in oxidative dehydrogenation of propane, while form II is the active species in sorption of As and the non-specific combustion of propane. To produce only form II by the treatment of montmorillonite with Fe3+, its load must be kept below 20 wt. percent; otherwise the usual hydrous ferric oxides are formed. Two major species were identified in Fe-treated montmorillonite: monomeric or dimeric hydroxoaqua cations .Form II behaves similarly to hydrous ferric oxides, but its thermal crystallization to hematite is postponed to 500–600 grad C. The Fe3+ cations in the interlayer space are much less thermally stable than Al pillars in pillared interlayered clays (PILCs). Form I is more active in oxidative dehydrogenation of propane, while form II is the active species in sorption of As and the non-specific combustion of propane. To produce only form II by the treatment of montmorillonite with Fe3+, its load must be kept below 20 wt. percent; otherwise the usual hydrous ferric oxides are formed.
dcterms:title
Fe(III)-modified montmorillonite and bentonite: synthesis, chemical and UV-Vis spectral characterization, arsenic sorption, and catalysis of oxidative dehydrogenation of propane Montmorillonit a bentonit modifikovaný Fe(III): příprava, chemická a UV-Vis spektrální charakterizace, sorpce arzénu a katalýza oxidační dehydrogenace propanu Fe(III)-modified montmorillonite and bentonite: synthesis, chemical and UV-Vis spectral characterization, arsenic sorption, and catalysis of oxidative dehydrogenation of propane
skos:prefLabel
Montmorillonit a bentonit modifikovaný Fe(III): příprava, chemická a UV-Vis spektrální charakterizace, sorpce arzénu a katalýza oxidační dehydrogenace propanu Fe(III)-modified montmorillonite and bentonite: synthesis, chemical and UV-Vis spectral characterization, arsenic sorption, and catalysis of oxidative dehydrogenation of propane Fe(III)-modified montmorillonite and bentonite: synthesis, chemical and UV-Vis spectral characterization, arsenic sorption, and catalysis of oxidative dehydrogenation of propane
skos:notation
RIV/61388980:_____/07:00082031!RIV07-GA0-61388980
n3:strany
165;176
n3:aktivita
n4:Z n4:P
n3:aktivity
P(GA202/04/0221), P(IAA3032401), P(IAA401250701), Z(AV0Z20410507), Z(AV0Z40320502)
n3:cisloPeriodika
2
n3:dodaniDat
n11:2007
n3:domaciTvurceVysledku
n8:7933665 n8:5758491 n8:4208994
n3:druhVysledku
n13:J
n3:duvernostUdaju
n9:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
421797
n3:idVysledku
RIV/61388980:_____/07:00082031
n3:jazykVysledku
n17:eng
n3:klicovaSlova
As sorption; Fe-montmorillonite; Fe-bentonite
n3:klicoveSlovo
n14:Fe-bentonite n14:Fe-montmorillonite n14:As%20sorption
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[2B1900D74CD2]
n3:nazevZdroje
Clays and Clay Minerals
n3:obor
n15:CA
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
6
n3:projekt
n5:IAA3032401 n5:GA202%2F04%2F0221 n5:IAA401250701
n3:rokUplatneniVysledku
n11:2007
n3:svazekPeriodika
55
n3:tvurceVysledku
Doušová, B. Schneeweiss, Oldřich Čapek, L. Hradil, David Bezdička, Petr Grygar, Tomáš
n3:zamer
n16:AV0Z40320502 n16:AV0Z20410507
s:issn
0009-8604
s:numberOfPages
12