Photocatalytic degradation of gaseous pollutants on nanostructured TiO2 films of various thickness and surface area

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43927964" target="_blank" >RIV/60461373:22310/23:43927964 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216275:25310/23:39920413 RIV/60461373:22350/23:43927964 RIV/00216305:26620/23:PU148510

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s43630-022-00359-0" target="_blank" >https://link.springer.com/article/10.1007/s43630-022-00359-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s43630-022-00359-0" target="_blank" >10.1007/s43630-022-00359-0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Photocatalytic degradation of gaseous pollutants on nanostructured TiO2 films of various thickness and surface area

Popis výsledku v původním jazyce

This work deals with the preparation of TiO2 nanoparticulate layers of various mass (0.05 mg/cm2 to 2 mg/cm2) from three commercial nanopowder materials, P90, P25 and CG 300, their characterisation (profilometry, BET and SEM) and evaluation of their photocatalytic activity in the gaseous phase in a flow-through photoreactor according to the ISO standard (ISO 22197-2). Hexane was chosen as a single model pollutant and a mixture of four compounds, namely acetaldehyde, acetone, heptane and toluene was used for the evaluation of the efficiency of simultaneous removal of several pollutants. A linear dependence between the layer mass and the layer thickness for all materials was found. Up to a layer mass 0.5 mg/cm2, the immobilisation P90 and P25 powder did not result in a decrease in BET surface area, whereas with an increase in layer mass to 1 mg/cm2, a decrease of the BET surface was observed, being more significant in the case of P90. The photocatalytic conversion of hexane was comparable for all immobilised powders up to a layer mass of 0.5 mg/cm2. For higher layer mass, the photocatalytic conversion of hexane on P25 and P90 differ; the latter achieved about 30% higher conversion. In the case of the simultaneous degradation of four compounds, acetaldehyde was degraded best, followed by acetone and toluene; the least degraded compound was heptane. The measurement of released CO2 revealed that 90% of degraded hexane was mineralised to CO2 and water while for a mixture of 4 VOCs, the level of mineralisation was 83%. Graphical abstract: [Figure not available: see fulltext.] © 2023, The Author(s).

Název v anglickém jazyce

Photocatalytic degradation of gaseous pollutants on nanostructured TiO2 films of various thickness and surface area

Popis výsledku anglicky

This work deals with the preparation of TiO2 nanoparticulate layers of various mass (0.05 mg/cm2 to 2 mg/cm2) from three commercial nanopowder materials, P90, P25 and CG 300, their characterisation (profilometry, BET and SEM) and evaluation of their photocatalytic activity in the gaseous phase in a flow-through photoreactor according to the ISO standard (ISO 22197-2). Hexane was chosen as a single model pollutant and a mixture of four compounds, namely acetaldehyde, acetone, heptane and toluene was used for the evaluation of the efficiency of simultaneous removal of several pollutants. A linear dependence between the layer mass and the layer thickness for all materials was found. Up to a layer mass 0.5 mg/cm2, the immobilisation P90 and P25 powder did not result in a decrease in BET surface area, whereas with an increase in layer mass to 1 mg/cm2, a decrease of the BET surface was observed, being more significant in the case of P90. The photocatalytic conversion of hexane was comparable for all immobilised powders up to a layer mass of 0.5 mg/cm2. For higher layer mass, the photocatalytic conversion of hexane on P25 and P90 differ; the latter achieved about 30% higher conversion. In the case of the simultaneous degradation of four compounds, acetaldehyde was degraded best, followed by acetone and toluene; the least degraded compound was heptane. The measurement of released CO2 revealed that 90% of degraded hexane was mineralised to CO2 and water while for a mixture of 4 VOCs, the level of mineralisation was 83%. Graphical abstract: [Figure not available: see fulltext.] © 2023, The Author(s).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

<a href="/cs/project/GA21-27243S" target="_blank" >GA21-27243S: Syntéza TiO2 nanotrubicových vrstev o velké ploše pro efektivní fotokatalytickou degradaci polutantů v plynné fázi a virů</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

PHOTOCHEMICAL &amp; PHOTOBIOLOGICAL SCIENCES

ISSN

1474-905X

e-ISSN

1474-9092

Svazek periodika

22

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

883-892

Kód UT WoS článku

000926878400001

EID výsledku v databázi Scopus

2-s2.0-85147532742