Composite TiO2-SiO2-REOs photocatalysts for water treatment: Degradation kinetics of monuron and its intermediates

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43926657" target="_blank" >RIV/60461373:22310/23:43926657 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1010603023004902?via%3Dihub#s0065" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1010603023004902?via%3Dihub#s0065</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jphotochem.2023.115025" target="_blank" >10.1016/j.jphotochem.2023.115025</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Composite TiO2-SiO2-REOs photocatalysts for water treatment: Degradation kinetics of monuron and its intermediates

Popis výsledku v původním jazyce

Modifying a hydrophilic TiO2 photocatalyst by hydrophobic rare-earth oxides (REOs) maypromote affinity to hydrophobic non-polar species, thus improving photocatalytic activity. Thepresent work was focused on the kinetics of photocatalytic degradation of the polar AcidOrange 7 (AO7) and of the non-polar herbicide monuron (3-(4-chlorophenyl)-1, 1-dimethylurea) and its degradation intermediates in the presence of composite TiO2 filmscontaining SiO2 binder and different REOs (CeO2, La2O3, Er2O3, Yb2O3). The addition ofREOs particles into the TiO2/SiO2 composite matrix resulted in an increase in the initialdegradation rate of monuron from 2.1 nmol min−1 cm−2 to 2.7 - 3.0 nmol min−1 cm−2.Furthermore, the ratios between the initial degradation rates of monuron to those of AO7 weresignificantly higher for composite films containing REOs showing a positive effect on theremoval of the non-polar monuron molecules for all REOs. A comparison between the kineticswith the various types of photocatalysts reveals that the positive impact of SiO2 and that ofSiO2/REOs on the kinetics was not limited to the conversion of monuron, but to the overallmineralization. The main novelty represents the fact although the rate of TOC decrease variedamong photocatalysts, the kinetics of intermediates is not significantly influenced

Název v anglickém jazyce

Composite TiO2-SiO2-REOs photocatalysts for water treatment: Degradation kinetics of monuron and its intermediates

Popis výsledku anglicky

Modifying a hydrophilic TiO2 photocatalyst by hydrophobic rare-earth oxides (REOs) maypromote affinity to hydrophobic non-polar species, thus improving photocatalytic activity. Thepresent work was focused on the kinetics of photocatalytic degradation of the polar AcidOrange 7 (AO7) and of the non-polar herbicide monuron (3-(4-chlorophenyl)-1, 1-dimethylurea) and its degradation intermediates in the presence of composite TiO2 filmscontaining SiO2 binder and different REOs (CeO2, La2O3, Er2O3, Yb2O3). The addition ofREOs particles into the TiO2/SiO2 composite matrix resulted in an increase in the initialdegradation rate of monuron from 2.1 nmol min−1 cm−2 to 2.7 - 3.0 nmol min−1 cm−2.Furthermore, the ratios between the initial degradation rates of monuron to those of AO7 weresignificantly higher for composite films containing REOs showing a positive effect on theremoval of the non-polar monuron molecules for all REOs. A comparison between the kineticswith the various types of photocatalysts reveals that the positive impact of SiO2 and that ofSiO2/REOs on the kinetics was not limited to the conversion of monuron, but to the overallmineralization. The main novelty represents the fact although the rate of TOC decrease variedamong photocatalysts, the kinetics of intermediates is not significantly influenced

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

<a href="/cs/project/LTAIZ19011" target="_blank" >LTAIZ19011: Nano částicové fotokatalyzátory zabudované do hydrofobní matrice pro čištění neprůhledných odpadních vod obsahujících nepolární, biologicky neodbouratelné látky</a><br>

Návaznosti

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

Rok uplatnění

2023

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

1873-2666

Svazek periodika

445

Číslo periodika v rámci svazku

115025

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

9

Strana od-do

1-9

Kód UT WoS článku

001116838100001

EID výsledku v databázi Scopus

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