Abstract
We studied the removal of nitrogen oxides pollutants via TiO2 Degussa P25 powder by photocatalysis. Parameters such as mass of catalyst, geometric irradiated surface, catalyst morphology, and thermal treatment were tested to explain the photocatalytic concentration decrease of nitrogen oxides. According to our working conditions, the conversion rates increased until an optimal value of the TiO2 weight, 35% of NO concentration and around 20% of NOx, was decomposed by the photocatalysis. The NOx removal increased proportionally with the irradiated geometric surface. The structural transformation of anatase to rutile performed by thermal treatment involved the decrease of the photocatalytic activity.
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Acknowledgements
Thanks are due to Dr. Didier Robert (Laboratoire de Chimie et Applications “Procédés Propres et Environnement”, Université de Metz, France) for the scientific discussions and delivery of the TiO2 Degussa P25 powder. The authors are very gratefull to Dr. Cathy Meunier (CREST-UFC Montbéliard, France) for carrying out the XRD powders analysis. The financial support for the FL Toma PhD Thesis provided by the “Communauté d’Agglomération du Pays de Montbéliard” (France) is acknowledged.
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Toma, F.L., Bertrand, G., Klein, D. et al. Photocatalytic removal of nitrogen oxides via titanium dioxide. Environ Chem Lett 2, 117–121 (2004). https://doi.org/10.1007/s10311-004-0087-2
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DOI: https://doi.org/10.1007/s10311-004-0087-2