Abstract
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.
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This paper is published as part of the themed issue of contributions from the 7th European Meeting on Solar Chemistry and Photocatalysis: Environmental Applications held in Porto, Portugal, June 2012.
Electronic supplementary information (ESI) available. See DOI: 10.1039/c2pp25239b
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Silva, C.G., Monteiro, J., Marques, R.R.N. et al. Photochemical and photocatalytic degradation of trans-resveratrol. Photochem Photobiol Sci 12, 638–644 (2013). https://doi.org/10.1039/c2pp25239b
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DOI: https://doi.org/10.1039/c2pp25239b