Toluene Oxidation by Photocatalytic Paint Under Different Indoor Environmental Conditions and Its Competitive Effect in the Presence of Another VOC

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F25%3A10258157" target="_blank" >RIV/61989100:27710/25:10258157 - isvavai.cz</a>

Výsledek na webu

<a href="https://onlinelibrary.wiley.com/doi/epdf/10.1002/tqem.70141" target="_blank" >https://onlinelibrary.wiley.com/doi/epdf/10.1002/tqem.70141</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/tqem.70141" target="_blank" >10.1002/tqem.70141</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Toluene Oxidation by Photocatalytic Paint Under Different Indoor Environmental Conditions and Its Competitive Effect in the Presence of Another VOC

Popis výsledku v původním jazyce

A photocatalytic paint based on carbon-doped titanium dioxide as a pigment replacement was tested for the oxidation of volatile organic compounds (VOCs) under visible-light illumination in indoor environments. The photocatalytic paint was characterized by X-ray photoelectron spectroscopy, scanning and transmission electron microscopy, and diffuse reflectance and transmittance spectral measurements. The effects of environmental conditions, including inlet concentration, relative humidity (RH), incident radiation flux, and residence time, on the degradation of toluene, an aromatic VOC, were investigated. At certain operating conditions, toluene degradation efficiency increased, from 38% to 61%, with the rise in the incident radiation flux from 6.86 to 42.34 W/m2, while it declined with increasing RH from 10% to 70%. A one-directional heterogeneous model predicted these trends, highlighting the opposing effects of incident radiation flux and humidity on toluene oxidation kinetics. In binary mixtures of toluene and acetaldehyde, representing aromatic and aliphatic VOCs, respectively, the presence of acetaldehyde had a negligible effect on toluene conversion, whereas acetaldehyde degradation was significantly reduced—by 36% and 65%—when co-fed with 3.5 and 6.5 ppmv of toluene, respectively, indicating a strong competitive effect between pollutants. This study highlights the benefit of using photocatalytic paint for indoor air decontamination and provides new insights into its performance under more realistic environmental conditions, particularly in the presence of mixed VOCs. © 2025 Elsevier B.V., All rights reserved.

Název v anglickém jazyce

Toluene Oxidation by Photocatalytic Paint Under Different Indoor Environmental Conditions and Its Competitive Effect in the Presence of Another VOC

Popis výsledku anglicky

A photocatalytic paint based on carbon-doped titanium dioxide as a pigment replacement was tested for the oxidation of volatile organic compounds (VOCs) under visible-light illumination in indoor environments. The photocatalytic paint was characterized by X-ray photoelectron spectroscopy, scanning and transmission electron microscopy, and diffuse reflectance and transmittance spectral measurements. The effects of environmental conditions, including inlet concentration, relative humidity (RH), incident radiation flux, and residence time, on the degradation of toluene, an aromatic VOC, were investigated. At certain operating conditions, toluene degradation efficiency increased, from 38% to 61%, with the rise in the incident radiation flux from 6.86 to 42.34 W/m2, while it declined with increasing RH from 10% to 70%. A one-directional heterogeneous model predicted these trends, highlighting the opposing effects of incident radiation flux and humidity on toluene oxidation kinetics. In binary mixtures of toluene and acetaldehyde, representing aromatic and aliphatic VOCs, respectively, the presence of acetaldehyde had a negligible effect on toluene conversion, whereas acetaldehyde degradation was significantly reduced—by 36% and 65%—when co-fed with 3.5 and 6.5 ppmv of toluene, respectively, indicating a strong competitive effect between pollutants. This study highlights the benefit of using photocatalytic paint for indoor air decontamination and provides new insights into its performance under more realistic environmental conditions, particularly in the presence of mixed VOCs. © 2025 Elsevier B.V., All rights reserved.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

—

Návaznosti

O - Projekt operacniho programu

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Environmental Quality Management

ISSN

1088-1913

e-ISSN

1520-6483

Svazek periodika

35

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

"e70141"

Kód UT WoS článku

001572687300013

EID výsledku v databázi Scopus

2-s2.0-105011494193