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Article Dans Une Revue Journal of Materials Chemistry Année : 2011

Synthesis and photocatalytic activity of iodine-doped ZnO nanoflowers

Résumé

The paper reports on the preparation and photocatalytic activity of thin films of iodine-doped ZnO nanoflowers deposited on glass substrate using a simple growth process based on hydrothermal synthesis. Addition of iodic acid (5-20 vol%) in the reaction mixture allows the introduction of iodine ions in the form of I or IO3 in the ZnO lattice, as suggested by X-ray photoelectron spectroscopy. Doping ZnO nanostructured films with iodine did not impact their morphology, while it has a significant influence on their optical properties. Indeed, the nanostructured ZnO films, prepared in the presence of iodic acid, display a large increase of the visible luminescence, which reaches a maximum at a concentration of 10 vol%. Finally, the photocatalytic activity of the ZnO nanostructured films for the photodegradation of a model pollutant, rhodamine B, was evaluated under UV and visible light irradiation. While under UV light irradiation, both undoped and iodine-doped ZnO films show a similar behavior, the photocatalytic performance of iodine-doped under visible light irradiation is significantly enhanced in comparison to that of undoped ZnO.
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Dates et versions

hal-00712624 , version 1 (27-06-2012)

Identifiants

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F. Barka-Bouaifel, B. Sieber, N. Bezzi, J. Benner, P. Roussel, et al.. Synthesis and photocatalytic activity of iodine-doped ZnO nanoflowers. Journal of Materials Chemistry, 2011, 21, pp.10982 - 10989. ⟨10.1039/C1JM11351H⟩. ⟨hal-00712624⟩
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