| Download | - View accepted manuscript: Au nanoparticles in nanocrystalline TiO2-NiO films for SPR-based, selective H2S gas sensing (PDF, 1.8 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1021/cm100297q |
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| Author | Search for: Gaspera, Enrico Della; Search for: Guglielmi, Massimo; Search for: Agnoli, Stefano; Search for: Granozzi, Gaetano; Search for: Post, Michael L.1; Search for: Bello, Valentina; Search for: Mattei, Giovanni; Search for: Martucci, Alessandro |
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| Affiliation | - National Research Council of Canada. NRC Institute for Chemical Process and Environmental Technology
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| Format | Text, Article |
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| Abstract | Thin films composed of Au nanoparticles dispersed inside a TiO₂-NiO mixed oxide matrix are prepared by the sol-gel method, resulting in nanostructured composites with a morphology and crystallinity that depend on synthesis parameters and thermal treatment. Their functional activity as hydrogen sulfide optical sensors is due to Au-localized surface plasmon resonance (SPR) which is reversible. The detection sensitivity is shown to be down to a few parts per million of H₂S, and almost no interference in response is observed during simultaneous exposure to CO or H₂, resulting in a highly sensitive and selective sensor for hydrogen sulfide detection. For mechanistic studies, experimental evidence using reaction product analysis and thin film surface characterization suggests a direct catalytic oxidation of H₂S over the Au-TiO₂-NiO nanocomposite film. |
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| Publication date | 2010 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NRC number | NRCC 51856 |
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| NPARC number | 15142166 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | abbd5858-d810-46b0-bc84-4c5011f687dd |
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| Record created | 2010-05-05 |
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| Record modified | 2020-04-17 |
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