Silver nanoparticle coatings with adjustable extinction spectra produced with liquid flame spray, and their role in photocatalytic enhancement of TiO2
Silver nanoparticles deposits were produced with liquid flame spray (LFS) on glass and TiO2 substrates to study their optical response and photocatalytic enhancement. The correlation between extinction spectrum of the nanoparticle coating and the LFS process parameters was studied. The spectra consi...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Materials & Design |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127524001722 |
| _version_ | 1797256455468875776 |
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| author | Miika Sorvali Tuomas Tinus Jerin Thamby Mari Honkanen Harri Ali-Löytty Alireza Charmforoushan Mika Valden Jarkko J. Saarinen Jyrki M. Mäkelä |
| author_facet | Miika Sorvali Tuomas Tinus Jerin Thamby Mari Honkanen Harri Ali-Löytty Alireza Charmforoushan Mika Valden Jarkko J. Saarinen Jyrki M. Mäkelä |
| author_sort | Miika Sorvali |
| collection | DOAJ |
| description | Silver nanoparticles deposits were produced with liquid flame spray (LFS) on glass and TiO2 substrates to study their optical response and photocatalytic enhancement. The correlation between extinction spectrum of the nanoparticle coating and the LFS process parameters was studied. The spectra consisted of two partly overlapping peaks: one centered in the UV region and the other in the visible light region. The visible light peak redshifted as either the silver mass concentration in the precursor solution or the precursor solution feed rate was increased, which also correlated with growing primary particle size. However, simultaneous correlation with photocatalytic activity of the decorated TiO2 surfaces was not observed, which was attributed to particle sintering on the surface. Instead, the photocatalytic activity was seen to change as the surface coverage of silver nanoparticles was varied. When the surface coverage was raised from ∼10 % to roughly 30 %, the activity, and then decreased as the loading was further raised. The increase was assumed to originate from plasmonic activation, and the decrease was attributed to the excessive amount of silver either blocking reactive area of the TiO2 or absorbing/scattering too much of the incoming light, which hindered the photocatalytic activity. |
| first_indexed | 2024-03-07T19:44:02Z |
| format | Article |
| id | doaj.art-fcb9b328d62c44ecb07a3a5f78e74b72 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-24T22:22:01Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-fcb9b328d62c44ecb07a3a5f78e74b722024-03-20T06:08:24ZengElsevierMaterials & Design0264-12752024-03-01239112800Silver nanoparticle coatings with adjustable extinction spectra produced with liquid flame spray, and their role in photocatalytic enhancement of TiO2Miika Sorvali0Tuomas Tinus1Jerin Thamby2Mari Honkanen3Harri Ali-Löytty4Alireza Charmforoushan5Mika Valden6Jarkko J. Saarinen7Jyrki M. Mäkelä8Aerosol Physics Laboratory, Physics Unit, Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 692, FI-33014 Tampere, FinlandSurface Science Group, Physics Unit, Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 692, FI-33014 Tampere, FinlandDepartment of Chemistry, University of Eastern Finland, Joensuu FI-80101, FinlandTampere Microscopy Center, Tampere University, FI-33014 Tampere, FinlandSurface Science Group, Physics Unit, Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 692, FI-33014 Tampere, Finland; Liquid Sun Ltd., Tekniikankatu 1, FI-33720 Tampere, FinlandAerosol Physics Laboratory, Physics Unit, Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 692, FI-33014 Tampere, FinlandSurface Science Group, Physics Unit, Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 692, FI-33014 Tampere, FinlandDepartment of Chemistry, University of Eastern Finland, Joensuu FI-80101, FinlandAerosol Physics Laboratory, Physics Unit, Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 692, FI-33014 Tampere, Finland; Corresponding author.Silver nanoparticles deposits were produced with liquid flame spray (LFS) on glass and TiO2 substrates to study their optical response and photocatalytic enhancement. The correlation between extinction spectrum of the nanoparticle coating and the LFS process parameters was studied. The spectra consisted of two partly overlapping peaks: one centered in the UV region and the other in the visible light region. The visible light peak redshifted as either the silver mass concentration in the precursor solution or the precursor solution feed rate was increased, which also correlated with growing primary particle size. However, simultaneous correlation with photocatalytic activity of the decorated TiO2 surfaces was not observed, which was attributed to particle sintering on the surface. Instead, the photocatalytic activity was seen to change as the surface coverage of silver nanoparticles was varied. When the surface coverage was raised from ∼10 % to roughly 30 %, the activity, and then decreased as the loading was further raised. The increase was assumed to originate from plasmonic activation, and the decrease was attributed to the excessive amount of silver either blocking reactive area of the TiO2 or absorbing/scattering too much of the incoming light, which hindered the photocatalytic activity.http://www.sciencedirect.com/science/article/pii/S0264127524001722 |
| spellingShingle | Miika Sorvali Tuomas Tinus Jerin Thamby Mari Honkanen Harri Ali-Löytty Alireza Charmforoushan Mika Valden Jarkko J. Saarinen Jyrki M. Mäkelä Silver nanoparticle coatings with adjustable extinction spectra produced with liquid flame spray, and their role in photocatalytic enhancement of TiO2 Materials & Design |
| title | Silver nanoparticle coatings with adjustable extinction spectra produced with liquid flame spray, and their role in photocatalytic enhancement of TiO2 |
| title_full | Silver nanoparticle coatings with adjustable extinction spectra produced with liquid flame spray, and their role in photocatalytic enhancement of TiO2 |
| title_fullStr | Silver nanoparticle coatings with adjustable extinction spectra produced with liquid flame spray, and their role in photocatalytic enhancement of TiO2 |
| title_full_unstemmed | Silver nanoparticle coatings with adjustable extinction spectra produced with liquid flame spray, and their role in photocatalytic enhancement of TiO2 |
| title_short | Silver nanoparticle coatings with adjustable extinction spectra produced with liquid flame spray, and their role in photocatalytic enhancement of TiO2 |
| title_sort | silver nanoparticle coatings with adjustable extinction spectra produced with liquid flame spray and their role in photocatalytic enhancement of tio2 |
| url | http://www.sciencedirect.com/science/article/pii/S0264127524001722 |
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