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Methodology for Simultaneous Analysis of Photocatalytic deNO(x) Products
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SYSNO ASEP 0558893 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Methodology for Simultaneous Analysis of Photocatalytic deNO(x) Products Author(s) Suchánek, Jan (UFCH-W) RID, ORCID
Vaněčková, Eva (UFCH-W) SAI, ORCID
Dostál, Michal (UFCH-W) RID, ORCID, SAI
Mikysková, Eliška (UFCH-W)
Brabec, Libor (UFCH-W) RID, ORCID
Žouželka, Radek (UFCH-W) RID
Rathouský, Jiří (UFCH-W) RID, ORCIDArticle number 661 Source Title Catalysts. - : MDPI
Roč. 12, č. 6 (2022)Number of pages 9 s. Language eng - English Country CH - Switzerland Keywords photocatalysis ; air purification ; NOx ; hono ; no2 ; mass balance Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry R&D Projects GA19-12109S GA ČR - Czech Science Foundation (CSF) EF16_013/0001821 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure NanoEnviCz II - 90124 - Ústav fyzikální chemie J. Heyrovského AV ČR, v. v. i. Method of publishing Open access Institutional support UFCH-W - RVO:61388955 UT WOS 000816439800001 EID SCOPUS 85132023771 DOI 10.3390/catal12060661 Annotation The ISO standard 22197-1:2016 used for the evaluation of the photocatalytic nitric oxide removal has a main drawback, which allows only the decrease of nitric oxide to be determined specifically. The remaining amount, expressed as ´´NO2´´, is considered as a sum of HNO3, HONO NO2, and other nitrogen-containing species, which can be potentially formed during the photocatalytic reaction. Therefore, we developed a new methodology combining our custom-made analyzers, which can accurately determine the true NO2 and HONO species, with the conventional NO one. Their function was validated via a photocatalytic experiment in which 100 ppbv of either NO or NO2 dispersed in air passed over (3 L min(-1)) an Aeroxide (c) TiO2 P25 surface. The gas-phase analysis was complemented with the spectrophotometric determination of nitrates (NO3-) and/or nitrites (NO2-) deposited on the P25 layer. Importantly, an almost perfect mass balance (94%) of the photocatalytic NOx abatement was achieved. The use of custom-made analyzers enables to obtain (i) no interference, (ii) high sensitivity, (iii) good linearity in the relevant concentration range, (iv) rapid response, and (v) long-term stability. Therefore, our approach enables to reveal the reaction complexity and is highly recommended for the photocatalytic NOx testing. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2023 Electronic address http://hdl.handle.net/11104/0332389
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