Řád reakce u fotokatalytické degradace různých organických sloučenin

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F07%3A00018696" target="_blank" >RIV/60461373:22310/07:00018696 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388955:_____/06:00353153

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Reaction order of photocatalytic degradation of various organic compounds

Popis výsledku v původním jazyce

The kinetics of photocatalytic degradation of four different model organic compounds, formic acid (FA), oxalic acid (OA), 4-chlorophenol (4-CP) and herbicide monuron, on irradiated titanium dioxide was compared. Both OA and FA were adsorbed on TiO2 surface so that their mineralization was induced by direct charge transfer. It proceed in one step, without intermediates, following approximately zero order kintics. Both 4-CP and monuron were practically not adsorbed under the used conditions. There their degradation had to be mediated through primary photogenerated hydroxyl radicals and proceeded with lower efficiency than that of the adsorbed compounds (FA and OA). While the mineralization of both 4-CP and monuron followed zero order kinetics, their degradation was close to first order. The different reaction orders can be consistently explained based on general mechanistic assumptions imploying a photostationary state approach.

Název v anglickém jazyce

Reaction order of photocatalytic degradation of various organic compounds

Popis výsledku anglicky

The kinetics of photocatalytic degradation of four different model organic compounds, formic acid (FA), oxalic acid (OA), 4-chlorophenol (4-CP) and herbicide monuron, on irradiated titanium dioxide was compared. Both OA and FA were adsorbed on TiO2 surface so that their mineralization was induced by direct charge transfer. It proceed in one step, without intermediates, following approximately zero order kintics. Both 4-CP and monuron were practically not adsorbed under the used conditions. There their degradation had to be mediated through primary photogenerated hydroxyl radicals and proceeded with lower efficiency than that of the adsorbed compounds (FA and OA). While the mineralization of both 4-CP and monuron followed zero order kinetics, their degradation was close to first order. The different reaction orders can be consistently explained based on general mechanistic assumptions imploying a photostationary state approach.

Druh

D - Stať ve sborníku

CEP obor

DJ - Znečištění a kontrola vody

OECD FORD obor

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Projekt

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

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2006

Kód důvěrnosti údajů

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

Název statě ve sborníku

New trends in application of photo and electro catalysis, Czech-Austrien workshop

ISBN

978-80-7080-022-5

ISSN

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e-ISSN

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Počet stran výsledku

2

Strana od-do

17-18

Název nakladatele

VŠCHT Praha

Místo vydání

Praha

Místo konání akce

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Datum konání akce

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Typ akce podle státní příslušnosti

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Kód UT WoS článku

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