Photochemical and photocatalytic degradation of trans-resveratrol

Photochemical and photocatalytic degradation of the emerging pollutant trans -resveratrol has been studied under different irradiation wavelengths and using different TiO 2 catalysts. trans -Resveratrol was more easily degraded when irradiated using the whole spectral range (UV-Vis) rather than with...

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Published in:Photochemical & photobiological sciences 2013-04, Vol.12 (4), p.638-644
Main Authors: Silva, Cláudia Gomes, Monteiro, Judith, Marques, Rita R. N., Silva, Adrián M. T., Martínez, Cristina, Canle L., Moisés, Faria, Joaquim Luís
Format: Article
Language:English
Subjects:
Biochemistry
Biomaterials
Catalysis
Chemistry
Isomerism
Kinetics
Light
Photolysis
Physical Chemistry
Plant Sciences
Spectroscopy, Fourier Transform Infrared
Stilbenes - chemistry
Titanium - chemistry
Ultraviolet Rays
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Summary:Photochemical and photocatalytic degradation of the emerging pollutant trans -resveratrol has been studied under different irradiation wavelengths and using different TiO 2 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 TiO 2 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.
ISSN:1474-905X
1474-9092
DOI:10.1039/c2pp25239b