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Statements

Subject Item
n2:RIV%2F61388955%3A_____%2F07%3A00087868%21RIV08-AV0-61388955
rdf:type
n9:Vysledek skos:Concept
dcterms:description
Tenké mesoporézní filmy ZnO byly připraveny elektrochemickou metodou využívající eosin Y jako činidla řídícího strukturu. Porézní filmy ZnO byly získány odstraněním eosinu ze struktury. Velikost jejich povrchu a mesoporozita byly charakterizovány fyzikální adsorpcí kryptonu. Parametry depozice, jako její délka a koncentrace eosinu v roztoku, byly optimalizovány, aby byly získány filmy s co možná největším povrchem tak i dobrými mechanickými vlastnostmi. Nejlepší kompromis byl nalezen pro filmy, jejichž tloušťka dosahuje 2 až 3 mikrometry a jež byly připraveny s koncentrací eosinu 50-60 mikroM. Fotodegradace heteropolyaromatického barviva methylenové modře a diazobarviva kongo červeně sloužily jako modelové reakce pro studium fotokatalytické aktivity filmů. Bylo zjištěno, rychlost fotodegradace pro obě barviva dosahuje maxima pro mesoporézní filmy připravené s koncentrací eosinu nad 40 mikroM. Thin mesoporous films of ZnO were prepared by electrochemical deposition using eosin Y as a structure-directing agent. After removal of the eosin from the structure, transparent porous ZnO films were obtained. The porosity and surface area of these films were determined by performing krypton BET measurements. Electrochemical deposition parameters, such as the deposition time and the eosin concentration in the plating bath, were optimized to prepare films with large internal surface areas and good mechanical properties. Eosin concentrations of 50-60 M were found to give the best-quality mesoporous zinc oxide films with film thicknesses ranging from 2 to 3 m. The photodegradations of a heteropolyaromatic dye (methylene blue) and a diazo dye (congo red) served as model reactions to assess the photocatalytic activity of the zinc oxide films. For both dyes, the photodegradation rate reached its maximum for mesoporous films that were prepared with eosin concentrations above 40 M. Thin mesoporous films of ZnO were prepared by electrochemical deposition using eosin Y as a structure-directing agent. After removal of the eosin from the structure, transparent porous ZnO films were obtained. The porosity and surface area of these films were determined by performing krypton BET measurements. Electrochemical deposition parameters, such as the deposition time and the eosin concentration in the plating bath, were optimized to prepare films with large internal surface areas and good mechanical properties. Eosin concentrations of 50-60 M were found to give the best-quality mesoporous zinc oxide films with film thicknesses ranging from 2 to 3 m. The photodegradations of a heteropolyaromatic dye (methylene blue) and a diazo dye (congo red) served as model reactions to assess the photocatalytic activity of the zinc oxide films. For both dyes, the photodegradation rate reached its maximum for mesoporous films that were prepared with eosin concentrations above 40 M.
dcterms:title
Electrodeposited Mesoporous ZnO Thin Films as Efficient Photocatalysts for the degradation of dye pollutants Tenké mesoporézní filmy ZnO připravené elektrodepozicí jako účinné fotokatalyzátory pro degradaci polutantů barviv Electrodeposited Mesoporous ZnO Thin Films as Efficient Photocatalysts for the degradation of dye pollutants
skos:prefLabel
Electrodeposited Mesoporous ZnO Thin Films as Efficient Photocatalysts for the degradation of dye pollutants Electrodeposited Mesoporous ZnO Thin Films as Efficient Photocatalysts for the degradation of dye pollutants Tenké mesoporézní filmy ZnO připravené elektrodepozicí jako účinné fotokatalyzátory pro degradaci polutantů barviv
skos:notation
RIV/61388955:_____/07:00087868!RIV08-AV0-61388955
n3:strany
7639;7644
n3:aktivita
n16:Z
n3:aktivity
Z(AV0Z40400503)
n3:cisloPeriodika
21
n3:dodaniDat
n4:2008
n3:domaciTvurceVysledku
n6:5120500
n3:druhVysledku
n8:J
n3:duvernostUdaju
n15:S
n3:entitaPredkladatele
n10:predkladatel
n3:idSjednocenehoVysledku
419723
n3:idVysledku
RIV/61388955:_____/07:00087868
n3:jazykVysledku
n7:eng
n3:klicovaSlova
ZnO films; photocatalysis; pollutants
n3:klicoveSlovo
n11:photocatalysis n11:pollutants n11:ZnO%20films
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[BE1F25FAB6B7]
n3:nazevZdroje
Journal of Physical Chemistry C
n3:obor
n13:CF
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
2
n3:rokUplatneniVysledku
n4:2007
n3:svazekPeriodika
111
n3:tvurceVysledku
Rathouský, Jiří Pauporté, T.
n3:zamer
n12:AV0Z40400503
s:issn
1932-7447
s:numberOfPages
6