Visible light-activated titaniumdioxide (TiO2), an environmental friendly material with very promisingphotocatalytic properties, has already being recognized as a potential and sustainablealternative for drinking water treatment. Recently, nanostructured NF-TiO2films synthesized by a novel modified sol-gel method had been proven effective totreat aqueous solutions of hepatotoxin microcystin-LR (MC-LR) under visiblelight. In this work, we investigate the effect of the addition of differentloadings of TiO2-Degussa P25 during synthesis of these films. Themodified films were characterized with XRD, ESEM, HR-TEM, AFM and evaluated forthe photocatalytic degradation of different microcystins isoforms (i.e., MC-LR,MC-RR, MC-LA and MC-YR) and cylindrospermopsin under visible and solar light,in both DI and natural water samples. Preliminary results suggest that theincorporation of Degussa P25 nanoparticles plays a significant role improvingthe adsorption capacity and the photocatalytic efficiency of NF-TiO2,with an optimum of 5g/L of TiO2-Degussa P25 loading in the sol underacidic conditions. The obtained results are discussed in terms of kinetics competitionbetween microcystins and corresponding adsorption mechanisms on the novelnanomaterials.

Novel NF-TiO<sub>2</sub>-P25 composite photocatalyst for the removal of microcystins and cylindrospermopsin under visible and solar light

241st National Meeting (2011)

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Novel NF-TiO2-P25 composite photocatalyst for the removal of microcystins and cylindrospermopsin under visible and solar light

Novel NF-TiO₂-P25 composite photocatalyst for the removal of microcystins and cylindrospermopsin under visible and solar light