Photoactivity assessment of TiO2 thin films using Acid Orange 7 and 4-chlorophenol as model compounds. Part I: Key dependencies

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F12%3A43894717" target="_blank" >RIV/60461373:22310/12:43894717 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jphotochem.2012.09.009" target="_blank" >http://dx.doi.org/10.1016/j.jphotochem.2012.09.009</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jphotochem.2012.09.009" target="_blank" >10.1016/j.jphotochem.2012.09.009</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Photoactivity assessment of TiO2 thin films using Acid Orange 7 and 4-chlorophenol as model compounds. Part I: Key dependencies

Popis výsledku v původním jazyce

Azo dye Acid Orange 7 (AO7) and 4-chlorophenol (4-CP) are frequently used model compounds for photocatalytic activity assessment of TiO2 thin films. This paper explores the key factors, such as: method of analysis, initial concentration, mass transfer and reaction kinetics, in order to help identify the optimal conditions for photocatalytic activity evaluation. It has been experimentally proved that simple visible absorption spectrophotometry can be used reliably to determine the concentration changes of AO7 during its photocatalytic degradation, but is inappropriate for 4-CP and liquid chromatography should be used instead. At low concentrations (10?5-10?4 M) the first order rate constant for the photocatalytic destruction of AO7 decreases with increasing [AO7], whereas for 4-CP, it remains unchanged. This effect is not due to an approaching monolayer surface coverage of the AO7 on the titania photocatalyst but instead is due to UV screening of the titania film by the dye AO7. Thus, i

Název v anglickém jazyce

Photoactivity assessment of TiO2 thin films using Acid Orange 7 and 4-chlorophenol as model compounds. Part I: Key dependencies

Popis výsledku anglicky

Azo dye Acid Orange 7 (AO7) and 4-chlorophenol (4-CP) are frequently used model compounds for photocatalytic activity assessment of TiO2 thin films. This paper explores the key factors, such as: method of analysis, initial concentration, mass transfer and reaction kinetics, in order to help identify the optimal conditions for photocatalytic activity evaluation. It has been experimentally proved that simple visible absorption spectrophotometry can be used reliably to determine the concentration changes of AO7 during its photocatalytic degradation, but is inappropriate for 4-CP and liquid chromatography should be used instead. At low concentrations (10?5-10?4 M) the first order rate constant for the photocatalytic destruction of AO7 decreases with increasing [AO7], whereas for 4-CP, it remains unchanged. This effect is not due to an approaching monolayer surface coverage of the AO7 on the titania photocatalyst but instead is due to UV screening of the titania film by the dye AO7. Thus, i

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JJ - Ostatní materiály

OECD FORD obor

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Projekt

<a href="/cs/project/GAP108%2F12%2F2104" target="_blank" >GAP108/12/2104: Pokročilé polovodičové materiály pro fotoelektrochemický rozklad vody</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2012

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

250

Číslo periodika v rámci svazku

15 December

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

5

Strana od-do

66-71

Kód UT WoS článku

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EID výsledku v databázi Scopus

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