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

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dc.contributor.authorBaudys, Michalcs
dc.contributor.authorBerthet, Eleonorecs
dc.contributor.authorMacák, Jancs
dc.contributor.authorLhotka, Miloslavcs
dc.contributor.authorKrýsa, Josefcs
dc.coverage.issue4cs
dc.coverage.volume22cs
dc.date.issued2023-04-01cs
dc.description.abstractThis work deals with the preparation of TiO2 nanoparticulate layers of various mass (0.05 mg/cm(2) to 2 mg/cm(2)) 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/cm(2), 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/cm(2), 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/cm(2). 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%.en
dc.formattextcs
dc.format.extent883-892cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationPhotochemical and Photobiological Sciences. 2023, vol. 22, issue 4, p. 883-892.en
dc.identifier.doi10.1007/s43630-022-00359-0cs
dc.identifier.issn1474-9092cs
dc.identifier.orcid0000-0001-7091-3022cs
dc.identifier.other184010cs
dc.identifier.scopus55655855500cs
dc.identifier.urihttp://hdl.handle.net/11012/213687
dc.language.isoencs
dc.publisherSpringer Naturecs
dc.relation.ispartofPhotochemical and Photobiological Sciencescs
dc.relation.urihttps://link.springer.com/article/10.1007/s43630-022-00359-0cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1474-9092/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectTiO2en
dc.subjectNanoparticulate filmsen
dc.subjectP90en
dc.subjectP25en
dc.subjectPhotocatalysisen
dc.subjectISO 22197-2en
dc.subjectGaseous pollutantsen
dc.titlePhotocatalytic degradation of gaseous pollutants on nanostructured TiO2 films of various thickness and surface areaen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-184010en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:51:19en
sync.item.modts2025.01.17 16:41:09en
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilé nízkodimenzionální nanomateriálycs
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