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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Localized surface plasmon resonance enhanced photocatalysis: an experimental and theoretical mechanistic investigation

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Autor(es):
de Souza, Michele Lemos [1, 2] ; dos Santos, Diego Pereira [3, 1] ; Corio, Paola [1]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Inst Chem, Sao Paulo, SP - Brazil
[2] Fluminense Fed Univ UFF, Dept Chem, Campus Volta Redonda, Volta Redonda, RJ - Brazil
[3] Univ Campinas UNICAMP, Inst Chem, Campinas, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: RSC ADVANCES; v. 8, n. 50, p. 28753-28762, 2018.
Citações Web of Science: 3
Resumo

Titanium dioxide (TiO2) is an advantageous material in catalytic photodegradation due to its low cost, high stability, and considerably higher efficiency when compared to other semiconductors. However, the need for artificial radiation sources in the UV range is a limitation to its use in wastewater remediation. In this context, Localized Surface Plasmon Resonance (LSPR) has been shown to enhance the photoexcitation of charge carriers in the semiconductor. In the present work, the investigation of catalytic photodegradation of phenol solution under distinct excitation by UV-visible or just visible radiation, employing three TiO2 based plasmonic catalysts, was conducted. Spherical silver nanoparticles which present LSPR along the TiO2 bandgap energy and electrically insulated silver nanoparticles were employed. Gold nanoparticles, which present low energy LSPR, were also employed in order to compare the excitation efficiency. Discrete dipole approximation simulations were carried out in order to verify the electric field enhancement and penetration at the semiconductor surface of each plasmonic catalyst. The results presented here may help to shed some light with respect to the contribution of plasmonic photocatalysts and the charge transfer mechanism in catalysts containing plasmonic structures. (AU)

Processo FAPESP: 16/21070-5 - Espectroscopia vibracional com resolução espacial
Beneficiário:Mauro Carlos Costa Ribeiro
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 08/03636-5 - Nanocompósitos metálicos para aplicações em processos fotoquímicos intensificados: efeitos de plasmon em fotocatálise e fotoeletroquímica
Beneficiário:Michele Lemos de Souza
Linha de fomento: Bolsas no Brasil - Doutorado Direto