Photocatalytic activity of Cr-doped TiO(2) nanoparticles deposited on porous multicrystalline silicon films

This work deals with the deposition of Cr-doped TiO(2) 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 TiO(2)-Cr/PS/Si samples has been investigated by means of X-ray diffraction (XRD)...

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Detalles Bibliográficos
Autores principales: Hajjaji, Anouar, Trabelsi, Khaled, Atyaoui, Atef, Gaidi, Mounir, Bousselmi, Latifa, Bessais, Brahim, El Khakani, My Ali
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer 2014
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4194057/
https://www.ncbi.nlm.nih.gov/pubmed/25313302
http://dx.doi.org/10.1186/1556-276X-9-543
Descripción
Sumario:This work deals with the deposition of Cr-doped TiO(2) 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 TiO(2)-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 TiO(2)-Cr/PS/Si samples. It was found that the TiO(2)-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.

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