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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
Photoactivity assessment of TiO2 thin films using Acid Orange 7 and 4-chlorophenol as model compounds. Part I: Key dependencies
Original language description
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
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JJ - Other materials
OECD FORD branch
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Project
<a href="/en/project/GAP108%2F12%2F2104" target="_blank" >GAP108/12/2104: Advanced semiconductor materials for photoelectrochemical water splitting</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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