The Role of TiO2 Photocatalyst in Degradation of Halogenated Phenols: Experimental, DFT and Antibacterial Study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F23%3A00569770" target="_blank" >RIV/61388955:_____/23:00569770 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989592:15310/23:73621285

Výsledek na webu

<a href="https://hdl.handle.net/11104/0341105" target="_blank" >https://hdl.handle.net/11104/0341105</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apcata.2023.119134" target="_blank" >10.1016/j.apcata.2023.119134</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Role of TiO2 Photocatalyst in Degradation of Halogenated Phenols: Experimental, DFT and Antibacterial Study

Popis výsledku v původním jazyce

Degradation of industrial pollutants 4-chlorophenol and 4-bromophenol by heterogeneous photocatalysis using different size and allotropes of TiO2 was investigated. The physico-chemical properties of a wide range of TiO2 nanoparticles were correlated with their photocatalytic activity. The increase in anatase particle size led to an enhancement of the halophenols degradation rate, oppositely to rutile. Based on DFT modelling and experimental data, alternative degradation pathways were proposed, leading either to hydroxylation of halophenol aromatic ring (large nanoparticles), or to direct decarboxylation (small nanoparticles). The participation of hydroxyl radicals was assessed with radical scavenger. The antibacterial activity of nanoparticles and chemical substances was investigated. Changes in toxicity during photocatalytic process were evaluated for selected photocatalysts. The results demonstrate that not only crystalline form and/or constitution of the photocatalyst, but also other properties as well as the treatment duration are important parameters in its performance and should be considered in development of photocatalytic applications.

Název v anglickém jazyce

The Role of TiO2 Photocatalyst in Degradation of Halogenated Phenols: Experimental, DFT and Antibacterial Study

Popis výsledku anglicky

Degradation of industrial pollutants 4-chlorophenol and 4-bromophenol by heterogeneous photocatalysis using different size and allotropes of TiO2 was investigated. The physico-chemical properties of a wide range of TiO2 nanoparticles were correlated with their photocatalytic activity. The increase in anatase particle size led to an enhancement of the halophenols degradation rate, oppositely to rutile. Based on DFT modelling and experimental data, alternative degradation pathways were proposed, leading either to hydroxylation of halophenol aromatic ring (large nanoparticles), or to direct decarboxylation (small nanoparticles). The participation of hydroxyl radicals was assessed with radical scavenger. The antibacterial activity of nanoparticles and chemical substances was investigated. Changes in toxicity during photocatalytic process were evaluated for selected photocatalysts. The results demonstrate that not only crystalline form and/or constitution of the photocatalyst, but also other properties as well as the treatment duration are important parameters in its performance and should be considered in development of photocatalytic applications.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Applied Catalysis A - General

ISSN

0926-860X

e-ISSN

1873-3875

Svazek periodika

656

Číslo periodika v rámci svazku

APR 2023

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

119134

Kód UT WoS článku

000994625700001

EID výsledku v databázi Scopus

2-s2.0-85149828026