Development of plasmonic photocatalysts for inactivation of microorganisms and decomposition of organic compounds

Ewa Kowalska

doi:10.1117/12.2542203

31 December 2019 Development of plasmonic photocatalysts for inactivation of microorganisms and decomposition of organic compounds

Ewa Kowalska

Author Affiliations +

Proceedings Volume 11201, SPIE Micro + Nano Materials, Devices, and Applications 2019; 112010O (2019) https://doi.org/10.1117/12.2542203
Event: ANZCOP, 2019, Melbourne, Australia

Abstract

Plasmonic photocatalysts, composed of titania and nanoparticles (NPs) of noble metals (NMs), were prepared, characterized and tested for decomposition of organic compounds and microorganisms under irradiation with UV and/or vis and in the dark conditions. It was found that modification of titania with NMNPs: (i) enhanced titania activity under UV irradiation (inhibition of charge carriers’ recombination), and (ii) activated titania under vis irradiation (localized surface plasmon absorption). Moreover, the properties of both support (morphology, phase composition, crystallite and particle sizes) and deposited NM (e.g., oxidation state, crystallite size, nanostructure) were crucial for broad response against chemical and microbiological pollutants. Various strategies have been proposed for activity and stability enhancements, e.g., an interface increase between NM and titania and fast “hot” electron transfer via shallow electron traps, which will be discussed in detail during this presentation.

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Ewa Kowalska "Development of plasmonic photocatalysts for inactivation of microorganisms and decomposition of organic compounds", Proc. SPIE 11201, SPIE Micro + Nano Materials, Devices, and Applications 2019, 112010O (31 December 2019); https://doi.org/10.1117/12.2542203

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