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Abstract
We compared the activity enhancement effect of noble metal deposited on TiO2 in photocatalytic nitrogen oxides oxidation. Titanium dioxide was decorated with Ag, Au, Pt or Pd in the sol-gel process. Synthesized catalysts were characterized by X-ray diffraction (XRD), Brunauer–Emmett–Teller measurement (BET), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and energy dispersive X-ray analysis (EDX). All catalysts together with pure TiO2 obtained by sol-gel (SG) technique were tested for their photocatalytic activity towards nitrogen oxide oxidation (high concentrations of 50, 150 and 250 ppm). FTIR spectrometry was used to determine the gas phase composition and identify TiO2 surface species. The Ag0.1 sample turned out to be deactivated within 60 min of UV/Vis irradiation. Photocatalytic oxidation rate towards NO2 turned to be the highest over SG (photocatalyst without metal deposition). NO2 formation was also observed for Au0.1, Au0.5, Pt0.1, Pt0.5 and Pd0.1. The best NOx removal, i.e., conversion to final product HNO3 was obtained with the Au0.5 photocatalyst.
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Authors (7)
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Kinga Skalska
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Anna Malankowska
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Jacek Balcerzak
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Maria Gazda prof. dr hab. inż.
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Grzegorz Nowaczyk
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Stefan Jurga
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Adriana Zaleska-Medynska Prof. dr hab. inż.
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Full text
- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.3390/catal12080857
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
Catalysts
no. 12,
pages 857 - 866,
ISSN: 2073-4344 - Language:
- English
- Publication year:
- 2022
- Bibliographic description:
- Skalska K., Malankowska A., Balcerzak J., Gazda M., Nowaczyk G., Jurga S., Zaleska-Medynska A.: NOx Photooxidation over Different Noble Metals Modified TiO2// Catalysts -Vol. 12,iss. 8 (2022), s.857-866
- DOI:
- Digital Object Identifier (open in new tab) 10.3390/catal12080857
- Sources of funding:
-
- Free publication
- Verified by:
- Gdańsk University of Technology
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