title: Photocatalytic activity of Cr-doped TiO2 nanoparticles deposited on porous multicrystalline silicon films.
abstract: This work deals with the deposition of Cr-doped TiO2 thin films on porous silicon (PS) prepared from electrochemical anodization of multicrystalline (mc-Si) Si wafers. The effect of Cr doping on the properties of the TiO2-Cr/PS/Si samples has been investigated by means of X-ray diffraction (XRD), atomic force microcopy (AFM), photoluminescence, lifetime, and laser beam-induced current (LBIC) measurements. The photocatalytic activity is carried out on TiO2-Cr/PS/Si samples. It was found that the TiO2-Cr/PS/mc-Si type structure degrades an organic pollutant (amido black) under ultraviolet (UV) light. A noticeable degradation of the pollutant is obtained for a Cr doping of 2 at. %. This result is discussed in light of LBIC and photoluminescence measurements.
authors.affiliation: Institut National de la Recherche Scientifique, INRS-Énergie, Matériaux et Télécommunications, 1650, Blvd. Lionel-Boulet, Varennes, QC J3X-1S2, Canada ; Laboratoire de Photovoltaïque, Centre de Recherches et des Technologies de l'Energie, Technopole de Borj-Cédria, BP 95, 2050 Hammam-Lif, Tunisia.
authors.forename: Anouar
authors.initials: A
authors.lastname: Hajjaji
authors.affiliation: Laboratoire de Photovoltaïque, Centre de Recherches et des Technologies de l'Energie, Technopole de Borj-Cédria, BP 95, 2050 Hammam-Lif, Tunisia.
authors.forename: Khaled
authors.initials: K
authors.lastname: Trabelsi
authors.affiliation: Laboratoire de Traitement et de Recyclage des Eaux, Centre de Recherches et des Technologies des Eaux, Technopôle de Borj Cedria, BP 273, 8020 Hammam-Lif, Tunisia.
authors.forename: Atef
authors.initials: A
authors.lastname: Atyaoui
authors.affiliation: Department of Applied Physics, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates.
authors.forename: Mounir
authors.initials: M
authors.lastname: Gaidi
authors.affiliation: Laboratoire de Traitement et de Recyclage des Eaux, Centre de Recherches et des Technologies des Eaux, Technopôle de Borj Cedria, BP 273, 8020 Hammam-Lif, Tunisia.
authors.forename: Latifa
authors.initials: L
authors.lastname: Bousselmi
authors.affiliation: Laboratoire de Photovoltaïque, Centre de Recherches et des Technologies de l'Energie, Technopole de Borj-Cédria, BP 95, 2050 Hammam-Lif, Tunisia.
authors.forename: Brahim
authors.initials: B
authors.lastname: Bessais
authors.affiliation: Institut National de la Recherche Scientifique, INRS-Énergie, Matériaux et Télécommunications, 1650, Blvd. Lionel-Boulet, Varennes, QC J3X-1S2, Canada.
authors.forename: My Ali
authors.initials: MA
authors.lastname: El Khakani
keywords: Amido black; Cr-TiO2; Multicrystalline silicon; Photocatalysis; Porous silicon