Mono- and bi-metallic plasmonic photocatalysts for degradation of organic compounds under UV and visible light irradiation - Publikacja - MOST Wiedzy

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Mono- and bi-metallic plasmonic photocatalysts for degradation of organic compounds under UV and visible light irradiation

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Titania powders were surface modified with gold and/or silver nanoparticles (NPs) by photodeposition method. Gold modified titania exhibited much higher photocatalytic activity during methanol dehydrogenation under UV irradiation than titania modified with monometallic silver and bimetallic Au–Ag NPs. Bimetallic photocatalysts exhibited either enhanced or reduced visible light activity, depending on properties of noble metal NPs, sequence of their deposition on titania, and properties of host titania. Though numerical simulation (3D-FDTD) showed strong plasmonic field enhancement at the interface between titania and bimetallic core(Au)–shell(Ag) NP, it is thought that co-deposition caused an enhancement of charge carriers recombination (by electron sinking in nearby second metal) inhibiting photoactivity under visible light irradiation. The highest level of photoactivity showed large rutile NPs with successively deposited metals, mainly in the form of individual monometallic NPs, due to size/shape polydispersity of deposited NPs, and thus with ability of light absorption in a broad wavelength range.

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Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
CATALYSIS TODAY nr 230, strony 131 - 137,
ISSN: 0920-5861
Język:
angielski
Rok wydania:
2014
Opis bibliograficzny:
Kowalska E., Janczarek M., Rosa ., Juodkazis S., Ohtani B.: Mono- and bi-metallic plasmonic photocatalysts for degradation of organic compounds under UV and visible light irradiation// CATALYSIS TODAY. -Vol. 230, (2014), s.131-137
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.cattod.2013.11.021
Weryfikacja:
Politechnika Gdańska

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