Photocatalytic Abatement of Ozone, VOC and NOx Pollutants in the Air Stream

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26763842%3A_____%2F23%3AN0000002" target="_blank" >RIV/26763842:_____/23:N0000002 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S1010603022004580" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1010603022004580</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jphotochem.2022.114235" target="_blank" >10.1016/j.jphotochem.2022.114235</a>

Result language

angličtina

Original language name

Photocatalytic Abatement of Ozone, VOC and NOx Pollutants in the Air Stream

Original language description

Up to now, the research has been mostly devoted to the photocatalytic removal of individual pollutants. As in real situations, the pollutants are always presented in a mixture, it is crucial to know whether there is some sort of interference, which can influence the efficiency of the whole photocatalytic degradation process. Here, we investigated the ability of two commercial coatings (binder-containing FN NANO®2 and binder-free AEROXIDE® TiO2 P25) to abate ozone, nitric oxide, and acetaldehyde separately and in their mixtures. Both photocatalysts effectively removed the pollutants present separately in the air stream, achieving conversions of 30–60 % (at an inlet concentration of 0.1 ppmv), even at the UV-A irradiation intensity as low as 0.05 mW cm−2. Furthermore, the use of binder-containing coating provided stable ozone conversions (30–40 %) in the full range of relative humidity, which is extraordinary in comparison with published data. The kinetic analysis indicates that the degradation mechanisms of nitric oxide, acetaldehyde, and ozone considerably differed. While for nitric oxide the reaction in the adsorbed state played a crucial role, for acetaldehyde and ozone that was marginal. Importantly, owing to the differences in degradation mechanisms, no mutual interference occurred when pollutant mixtures were treated. This finding is of major importance for the application of photocatalysis as environmental technology.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10403 - Physical chemistry

Project

<a href="/en/project/FV40209" target="_blank" >FV40209: Utilization of Optimized Photocatalytic Nanocompostes for Depollution of Air from Harmful Contaminants</a><br>

Continuities

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

Publication year

2023

Confidentiality

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

Name of the periodical

Photocatalytic abatement of air pollutants: Focus on their interference in mixtures

ISSN

1010-6030

e-ISSN

1873-2666

Volume of the periodical

434

Issue of the periodical within the volume

JAN 2023

Country of publishing house

CH - SWITZERLAND

Number of pages

6

Pages from-to

114235

UT code for WoS article

000870209300004

EID of the result in the Scopus database

2-s2.0-85137395900