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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
de Souza, Michele Lemos [1, 2] ; dos Santos, Diego Pereira [3, 1] ; Corio, Paola [1]
Total Authors: 3
Affiliation:
[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
Total Affiliations: 3
Document type: Journal article
Source: RSC ADVANCES; v. 8, n. 50, p. 28753-28762, 2018.
Web of Science Citations: 5
Abstract

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)

FAPESP's process: 08/03636-5 - Applications of metallic nanocomposites in enhanced photochemical processes: plasmon effects in photocatalysis and photoelectrochemistry
Grantee:Michele Lemos de Souza
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 16/21070-5 - Vibrational spectroscopy with spatial resolution
Grantee:Mauro Carlos Costa Ribeiro
Support Opportunities: Research Projects - Thematic Grants