Fe(III) Photoinduced and Q-TiO2 Photocatalysed Degradation of Napthalene: Comparison of Kinetics and Proposal of Mechanism.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F02%3A54020118" target="_blank" >RIV/61388955:_____/02:54020118 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Fe(III) Photoinduced and Q-TiO2 Photocatalysed Degradation of Napthalene: Comparison of Kinetics and Proposal of Mechanism.

Popis výsledku v původním jazyce

Degradation of naphthalene was investigated in two systems producing hydroxyl radical: in homogeneous solution of Fe(III) Perchlorate and in heterogeneous colloidal solution of Q-TiO2. The Fe(III) photoinduced degradation of naphthalene approximately followed first order kinetics with rate constant strongly dependent on the content of most photoactive Fe(III) species, Fe(OH)(2+). In the case of the degradation photocatalysed by Q-TiO2, more complicated kinetics controlled by a charge-transfer surface complex with naphthalene degradation intermediates was observed. The primary degradation intermediates (2-formylcinnamaldehyde, 1,2-naphthoquinone, 1,4-naphthoquinone, 1-naphthol, 2-naphthol) were the same for both systems. The reaction mechanism of the degradation was proposed assuming the attack of hydroxyl radical followed by the addition of dioxygen, resulting in the direct opening of the aromatic ring.

Název v anglickém jazyce

Fe(III) Photoinduced and Q-TiO2 Photocatalysed Degradation of Napthalene: Comparison of Kinetics and Proposal of Mechanism.

Popis výsledku anglicky

Degradation of naphthalene was investigated in two systems producing hydroxyl radical: in homogeneous solution of Fe(III) Perchlorate and in heterogeneous colloidal solution of Q-TiO2. The Fe(III) photoinduced degradation of naphthalene approximately followed first order kinetics with rate constant strongly dependent on the content of most photoactive Fe(III) species, Fe(OH)(2+). In the case of the degradation photocatalysed by Q-TiO2, more complicated kinetics controlled by a charge-transfer surface complex with naphthalene degradation intermediates was observed. The primary degradation intermediates (2-formylcinnamaldehyde, 1,2-naphthoquinone, 1,4-naphthoquinone, 1-naphthol, 2-naphthol) were the same for both systems. The reaction mechanism of the degradation was proposed assuming the attack of hydroxyl radical followed by the addition of dioxygen, resulting in the direct opening of the aromatic ring.

Druh

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

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

—

Projekt

<a href="/cs/project/GA203%2F99%2F0763" target="_blank" >GA203/99/0763: Fotokatalytická dekontaminace pitné vody s využitím sluneční energie</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2002

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

—

Svazek periodika

151

Číslo periodika v rámci svazku

N/A

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

13

Strana od-do

181-193

Kód UT WoS článku

—

EID výsledku v databázi Scopus

—