Srovnávací studie fotokatalytických vlastností tenkých mesoporézních vrstev TiO2 s řízenou mesoporozitou

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F08%3A00309564" target="_blank" >RIV/61388955:_____/08:00309564 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

A comparative study into the photocatalytic properties of thin mesoporous layers of TiO2 with controlled mesoporosity

Popis výsledku v původním jazyce

Mesoporous films of TiO2 were prepared by a sol-gel procedure using a Pluronic (R) block copolymer and the dip-coating technique. The film thickness was controlled by changing the film withdrawal rate and by repetitive coatings. The amount of dye molecules adsorbed onto the mesoporous film depends on the dye properties, with thionine and methylene blue being more strongly adsorbed than rhodamine B, methyl orange and methyl red. The photocatalytic efficiency of the degradation of these dyes strongly depends on their respective degradation mechanism. It was found that the optimum efficiency is achieved when the target molecule is adsorbed only to some extent thus enabling its decomposition directly by the attack of holes. On the other hand, secondary oxidizing species such as O-2(center dot-) and HO2 center dot but most likely even OH center dot play a crucial role in the oxidation mechanism, which is particularly evident in the case of methylene red.

Název v anglickém jazyce

A comparative study into the photocatalytic properties of thin mesoporous layers of TiO2 with controlled mesoporosity

Popis výsledku anglicky

Mesoporous films of TiO2 were prepared by a sol-gel procedure using a Pluronic (R) block copolymer and the dip-coating technique. The film thickness was controlled by changing the film withdrawal rate and by repetitive coatings. The amount of dye molecules adsorbed onto the mesoporous film depends on the dye properties, with thionine and methylene blue being more strongly adsorbed than rhodamine B, methyl orange and methyl red. The photocatalytic efficiency of the degradation of these dyes strongly depends on their respective degradation mechanism. It was found that the optimum efficiency is achieved when the target molecule is adsorbed only to some extent thus enabling its decomposition directly by the attack of holes. On the other hand, secondary oxidizing species such as O-2(center dot-) and HO2 center dot but most likely even OH center dot play a crucial role in the oxidation mechanism, which is particularly evident in the case of methylene red.

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/1M0577" target="_blank" >1M0577: Výzkumné centrum pro nanopovrchové inženýrství</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2008

Kód důvěrnosti údajů

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

Název periodika

Journal of Photochemistry and Photobiology A-Chemistry

ISSN

1010-6030

e-ISSN

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Svazek periodika

194

Číslo periodika v rámci svazku

2-3

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

8

Strana od-do

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Kód UT WoS článku

253874200011

EID výsledku v databázi Scopus

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