TiO2 Films Modified with Au Nanoclusters as Self-Cleaning Surfaces under Visible Light
In this study, we applied cluster beam deposition (CBD) as a new approach for fabricating efficient plasmon-based photocatalytic materials. Au nanoclusters (AuNCs) produced in the gas phase were deposited on TiO2 P25-coated silicon wafers with coverage ranging from 2 to 8 atomic monolayer (ML) equiv...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-01-01
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| Series: | Nanomaterials |
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| Online Access: | http://www.mdpi.com/2079-4991/8/1/30 |
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| author | Ting-Wei Liao Sammy W. Verbruggen Nathalie Claes Anupam Yadav Didier Grandjean Sara Bals Peter Lievens |
| author_facet | Ting-Wei Liao Sammy W. Verbruggen Nathalie Claes Anupam Yadav Didier Grandjean Sara Bals Peter Lievens |
| author_sort | Ting-Wei Liao |
| collection | DOAJ |
| description | In this study, we applied cluster beam deposition (CBD) as a new approach for fabricating efficient plasmon-based photocatalytic materials. Au nanoclusters (AuNCs) produced in the gas phase were deposited on TiO2 P25-coated silicon wafers with coverage ranging from 2 to 8 atomic monolayer (ML) equivalents. Scanning Electron Microscopy (SEM) images of the AuNCs modified TiO2 P25 films show that the surface is uniformly covered by the AuNCs that remain isolated at low coverage (2 ML, 4 ML) and aggregate at higher coverage (8 ML). A clear relationship between AuNCs coverage and photocatalytic activity towards stearic acid photo-oxidation was measured, both under ultraviolet and green light illumination. TiO2 P25 covered with 4 ML AuNCs showed the best stearic acid photo-oxidation performance under green light illumination (Formal Quantum Efficiency 1.6 × 10−6 over a period of 93 h). These results demonstrate the large potential of gas-phase AuNCs beam deposition technology for the fabrication of visible light active plasmonic photocatalysts. |
| first_indexed | 2024-12-13T22:16:06Z |
| format | Article |
| id | doaj.art-05b578ddeb3d4e34a0dfb86967c41652 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-12-13T22:16:06Z |
| publishDate | 2018-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-05b578ddeb3d4e34a0dfb86967c416522022-12-21T23:29:31ZengMDPI AGNanomaterials2079-49912018-01-01813010.3390/nano8010030nano8010030TiO2 Films Modified with Au Nanoclusters as Self-Cleaning Surfaces under Visible LightTing-Wei Liao0Sammy W. Verbruggen1Nathalie Claes2Anupam Yadav3Didier Grandjean4Sara Bals5Peter Lievens6Laboratory of Solid-State Physics and Magnetism, KU Leuven, Celestijnenlaan 200D, Box 2414, BE-3001 Leuven, BelgiumSustainable Energy, Air & Water Technology (DuEL), University of Antwerp, Groenenborgerlaan 171, BE-2020 Antwerp, BelgiumElectron Microscopy for Materials Research (EMAT), University of Antwerp, Groenenborgerlaan 171, BE-2020 Antwerp, BelgiumLaboratory of Solid-State Physics and Magnetism, KU Leuven, Celestijnenlaan 200D, Box 2414, BE-3001 Leuven, BelgiumLaboratory of Solid-State Physics and Magnetism, KU Leuven, Celestijnenlaan 200D, Box 2414, BE-3001 Leuven, BelgiumElectron Microscopy for Materials Research (EMAT), University of Antwerp, Groenenborgerlaan 171, BE-2020 Antwerp, BelgiumLaboratory of Solid-State Physics and Magnetism, KU Leuven, Celestijnenlaan 200D, Box 2414, BE-3001 Leuven, BelgiumIn this study, we applied cluster beam deposition (CBD) as a new approach for fabricating efficient plasmon-based photocatalytic materials. Au nanoclusters (AuNCs) produced in the gas phase were deposited on TiO2 P25-coated silicon wafers with coverage ranging from 2 to 8 atomic monolayer (ML) equivalents. Scanning Electron Microscopy (SEM) images of the AuNCs modified TiO2 P25 films show that the surface is uniformly covered by the AuNCs that remain isolated at low coverage (2 ML, 4 ML) and aggregate at higher coverage (8 ML). A clear relationship between AuNCs coverage and photocatalytic activity towards stearic acid photo-oxidation was measured, both under ultraviolet and green light illumination. TiO2 P25 covered with 4 ML AuNCs showed the best stearic acid photo-oxidation performance under green light illumination (Formal Quantum Efficiency 1.6 × 10−6 over a period of 93 h). These results demonstrate the large potential of gas-phase AuNCs beam deposition technology for the fabrication of visible light active plasmonic photocatalysts.http://www.mdpi.com/2079-4991/8/1/30photocatalysisgold nanoclustersplasmonicscluster beam depositionstearic acidself-cleaning surfaces |
| spellingShingle | Ting-Wei Liao Sammy W. Verbruggen Nathalie Claes Anupam Yadav Didier Grandjean Sara Bals Peter Lievens TiO2 Films Modified with Au Nanoclusters as Self-Cleaning Surfaces under Visible Light Nanomaterials photocatalysis gold nanoclusters plasmonics cluster beam deposition stearic acid self-cleaning surfaces |
| title | TiO2 Films Modified with Au Nanoclusters as Self-Cleaning Surfaces under Visible Light |
| title_full | TiO2 Films Modified with Au Nanoclusters as Self-Cleaning Surfaces under Visible Light |
| title_fullStr | TiO2 Films Modified with Au Nanoclusters as Self-Cleaning Surfaces under Visible Light |
| title_full_unstemmed | TiO2 Films Modified with Au Nanoclusters as Self-Cleaning Surfaces under Visible Light |
| title_short | TiO2 Films Modified with Au Nanoclusters as Self-Cleaning Surfaces under Visible Light |
| title_sort | tio2 films modified with au nanoclusters as self cleaning surfaces under visible light |
| topic | photocatalysis gold nanoclusters plasmonics cluster beam deposition stearic acid self-cleaning surfaces |
| url | http://www.mdpi.com/2079-4991/8/1/30 |
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