Photochemical and photocatalytic degradation of trans-resveratrol

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

Claudia Gomes Silva (Autor) FEUP; Judith Monteiro (Autor) Outra; Rita R N Marques (Autor) Outra; Adrian M T Silva (Autor) FEUP; Cristina Martinez (Autor) Outra; Moises Canle L (Autor) Outra; Joaquim Luis Faria (Autor) FEUP

Revista

Título: Photochemical & Photobiological Sciences

Vol. 12

Páginas: 638-644

ISSN: 1474-905X

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 27 Citações

ISI Web of Science

Scopus - 38 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-005-3MB

DOI: 10.1039/c2pp25239b

Abstract (EN): Photochemical and photocatalytic degradation of the emerging pollutant trans-resveratrol has been studied under different irradiation wavelengths and using different TiO2 catalysts. trans-Resveratrol was more easily degraded when irradiated using the whole spectral range (UV-Vis) rather than with UV and near-UV to visible irradiation. The main intermediate of trans-resveratrol phototransformation was identified as its isomer cis-resveratrol. Different TiO2 catalysts were used to carry out the photocatalytic degradation of trans-resveratrol. Catalysts properties such as crystallite dimensions, surface area and presence of hydroxy surface groups are shown to be crucial to the photocatalytic efficiency of the materials tested. From the point of view of trans-resveratrol abatement, the photocatalytic process was more efficient than the pure photochemical one resulting in higher degradation rates and higher organic content removal. Six photoproducts of trans-resveratrol phototransformation were identified mainly resulting from the attack of the hydroxyl radical to the organic molecule.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7