NO<sub>x</sub> Photooxidation over Different Noble Metals Modified TiO<sub>2</sub>
We compared the activity enhancement effect of noble metal deposited on TiO<sub>2</sub> 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–...
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MDPI AG
2022-08-01
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| Online Access: | https://www.mdpi.com/2073-4344/12/8/857 |
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| author | Kinga Skalska Anna Malankowska Jacek Balcerzak Maria Gazda Grzegorz Nowaczyk Stefan Jurga Adriana Zaleska-Medynska |
| author_facet | Kinga Skalska Anna Malankowska Jacek Balcerzak Maria Gazda Grzegorz Nowaczyk Stefan Jurga Adriana Zaleska-Medynska |
| author_sort | Kinga Skalska |
| collection | DOAJ |
| description | We compared the activity enhancement effect of noble metal deposited on TiO<sub>2</sub> 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 TiO<sub>2</sub> 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 TiO<sub>2</sub> surface species. The Ag0.1 sample turned out to be deactivated within 60 min of UV/Vis irradiation. Photocatalytic oxidation rate towards NO<sub>2</sub> turned to be the highest over SG (photocatalyst without metal deposition). NO<sub>2</sub> formation was also observed for Au0.1, Au0.5, Pt0.1, Pt0.5 and Pd0.1. The best NO<sub>x</sub> removal, i.e., conversion to final product HNO<sub>3</sub> was obtained with the Au0.5 photocatalyst. |
| first_indexed | 2024-03-09T04:36:32Z |
| format | Article |
| id | doaj.art-1472ba7059a740ccb37dc62a251efdd8 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-09T04:36:32Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-1472ba7059a740ccb37dc62a251efdd82023-12-03T13:26:07ZengMDPI AGCatalysts2073-43442022-08-0112885710.3390/catal12080857NO<sub>x</sub> Photooxidation over Different Noble Metals Modified TiO<sub>2</sub>Kinga Skalska0Anna Malankowska1Jacek Balcerzak2Maria Gazda3Grzegorz Nowaczyk4Stefan Jurga5Adriana Zaleska-Medynska6Department of Separation Science, LUT University, Sammonkatu 12, 50130 Mikkeli, FinlandDepartment of Environmental Technology, Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308 Gdansk, PolandDepartment of Molecular Engineering, Faculty of Process and Environmental Engineering, Lodz University of Technology, Wolczanska 213, 90-924 Lodz, PolandDepartment of Solid State Physics, Faculty of Applied Physics and Mathematics, Gdansk University of Technology, 80-952 Gdansk, PolandNanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznan, PolandNanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznan, PolandDepartment of Environmental Technology, Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308 Gdansk, PolandWe compared the activity enhancement effect of noble metal deposited on TiO<sub>2</sub> 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 TiO<sub>2</sub> 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 TiO<sub>2</sub> surface species. The Ag0.1 sample turned out to be deactivated within 60 min of UV/Vis irradiation. Photocatalytic oxidation rate towards NO<sub>2</sub> turned to be the highest over SG (photocatalyst without metal deposition). NO<sub>2</sub> formation was also observed for Au0.1, Au0.5, Pt0.1, Pt0.5 and Pd0.1. The best NO<sub>x</sub> removal, i.e., conversion to final product HNO<sub>3</sub> was obtained with the Au0.5 photocatalyst.https://www.mdpi.com/2073-4344/12/8/857NO<sub>x</sub> emission abatementTiO<sub>2</sub>surface decorationnoble metalsnitrogen oxidephotocatalysis |
| spellingShingle | Kinga Skalska Anna Malankowska Jacek Balcerzak Maria Gazda Grzegorz Nowaczyk Stefan Jurga Adriana Zaleska-Medynska NO<sub>x</sub> Photooxidation over Different Noble Metals Modified TiO<sub>2</sub> Catalysts NO<sub>x</sub> emission abatement TiO<sub>2</sub> surface decoration noble metals nitrogen oxide photocatalysis |
| title | NO<sub>x</sub> Photooxidation over Different Noble Metals Modified TiO<sub>2</sub> |
| title_full | NO<sub>x</sub> Photooxidation over Different Noble Metals Modified TiO<sub>2</sub> |
| title_fullStr | NO<sub>x</sub> Photooxidation over Different Noble Metals Modified TiO<sub>2</sub> |
| title_full_unstemmed | NO<sub>x</sub> Photooxidation over Different Noble Metals Modified TiO<sub>2</sub> |
| title_short | NO<sub>x</sub> Photooxidation over Different Noble Metals Modified TiO<sub>2</sub> |
| title_sort | no sub x sub photooxidation over different noble metals modified tio sub 2 sub |
| topic | NO<sub>x</sub> emission abatement TiO<sub>2</sub> surface decoration noble metals nitrogen oxide photocatalysis |
| url | https://www.mdpi.com/2073-4344/12/8/857 |
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