Optical, structural and photocatalysis properties of Cu-doped TiO2 thin films

F. Bensouici, M. Bououdina, A. A. Dakhel, R. Tala-Ighil, M. Tounane, A. Iratni, T. Souier, S. Liu, W. Cai

Research output: Contribution to journalArticle

70 Citations (Scopus)

Abstract

Pure and Cu+2 doped TiO2 thin films have been successfully deposited onto glass substrate by sol–gel dip-coating. The films were annealed at 450 °C for 1 h and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM-EDX), atomic force microscopy (AFM), UV–vis spectrophotometer and photocatalytic degradation of methylene blue. XRD confirmed the presence of two phases at higher Cu concentration; TiO2 anatase and CuO. AFM analysis showed that the surface roughness increases within increasing Cu content as well as the presence of large aggregates at higher Cu content. SEM observations confirmed the granular structure of the films, and EDX analysis revealed a low solubility limit (effective doping) of Cu into TiO2 lattice. It was found that the optical band gap energy decreases with increasing Cu content. At constant irradiation time, the photo-degradation of methylene blue rate decreased with increasing concentration of Cu+2.

Original languageEnglish
Pages (from-to)110-116
Number of pages7
JournalApplied Surface Science
Volume395
DOIs
Publication statusPublished - Feb 15 2017

    Fingerprint

Keywords

  • Anatase TiO
  • Cu doped TiO thin films
  • Optical properties
  • Photocatalytic activity
  • Structural properties

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this

Bensouici, F., Bououdina, M., Dakhel, A. A., Tala-Ighil, R., Tounane, M., Iratni, A., Souier, T., Liu, S., & Cai, W. (2017). Optical, structural and photocatalysis properties of Cu-doped TiO2 thin films. Applied Surface Science, 395, 110-116. https://doi.org/10.1016/j.apsusc.2016.07.034